Nutrien (NTR) 40-F26 Feb 212020 FY Annual report (Canada)Financial data

Company Profile

Document and Entity Information

Document and Entity Information	12 Months Ended
Document and Entity Information	Dec. 31, 2020shares
Document - Document and Entity Information [Abstract]
Document Type	40-F
Amendment Flag	false
Document Period End Date	Dec. 31, 2020
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Trading Symbol	NTR
Entity Registrant Name	NUTRIEN LTD.
Entity Central Index Key	0001725964
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding	569,260,406
Entity Interactive Date Current	Yes

Consolidated Statements of Earn

Consolidated Statements of Earnings - USD ($) $ in Millions		12 Months Ended
Consolidated Statements of Earnings - USD ($) $ in Millions		Dec. 31, 2020	Dec. 31, 2019
Profit or loss [abstract]
SALES (Note 3)		$ 20,908	$ 20,084
Freight, transportation and distribution (Note 4)		855	768
Cost of goods sold (Note 4)		14,814	13,814
GROSS MARGIN		5,239	5,502
Selling expenses (Note 4)		2,813	2,505
General and administrative expenses (Note 4)		429	404
Provincial mining and other taxes (Note 4)		204	292
Share-based compensation (Note 5)		69	104
Impairment of assets (Note 13, 14)		824	120
Other income (expenses) (Note 6)		(2)	215
EARNINGS BEFORE FINANCE COSTS AND INCOME TAXES		902	1,862
Finance costs (Note 7)		520	554
EARNINGS BEFORE INCOME TAXES		382	1,308
Income tax (recovery) expense (Note 8)		(77)	316
NET EARNINGS	[1]	$ 459	$ 992
NET EARNINGS PER SHARE ("EPS") (Note 9)
Basic		$ 0.81	$ 1.7
Diluted		$ 0.81	$ 1.7
Weighted average shares outstanding for basic EPS (Note 9)		569,657,000	582,269,000
Weighted average shares outstanding for diluted EPS (Note 9)		569,686,000	583,102,000

[1]	All equity transactions were attributable to common shareholders.

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019
Statement of comprehensive income [abstract]
NET EARNINGS	[1]	$ 459	$ 992
Items that will not be reclassified to net earnings:
Net actuarial gain on defined benefit plans		75	7
Net fair value loss on investments		(7)	(25)
Items that have been or may be subsequently reclassified to net earnings:
Gain on currency translation of foreign operations		142	47
Other		(16)	7
OTHER COMPREHENSIVE INCOME	[1]	194	36
COMPREHENSIVE INCOME		$ 653	$ 1,028

[1]	All equity transactions were attributable to common shareholders.

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019
OPERATING ACTIVITIES
Net earnings	[1]	$ 459	$ 992
Depreciation and amortization		1,989	1,799
Share-based compensation (Note 5)		69	104
Impairment of assets (Notes 13,14)		824	120
Net gain on disposal of investment in MOPCO (Note 15)		(250)	0
(Recovery of) provision for deferred income tax		(9)	177
Other long-term assets, liabilities and miscellaneous (Note 16)		(333)	(17)
Cash from operations before working capital changes		2,749	3,175
Receivables		145	(64)
Inventories		85	190
Prepaid expenses and other current assets		(10)	(238)
Payables and accrued charges		354	602
CASH PROVIDED BY OPERATING ACTIVITIES		3,323	3,665
INVESTING ACTIVITIES
Additions to property, plant and equipment (Note 13)		(1,423)	(1,728)
Additions to intangible assets (Note 14)		(126)	(163)
Business acquisitions, net of cash acquired (Note 25)		(233)	(911)
Proceeds from disposal of investment in MOPCO (Note 15)		540	0
Proceeds from disposal of discontinued operations, net of tax		0	55
Purchase of investments		(102)	(198)
Other		140	147
CASH USED IN INVESTING ACTIVITIES		(1,204)	(2,798)
FINANCING ACTIVITIES
Transaction costs on long-term debt		(15)	(29)
(Repayment of) proceeds from short-term debt, net (Note 17)		(892)	216
Proceeds from long-term debt (Note 18)		1,541	1,510
Repayment of long-term debt (Note 18)		(509)	(1,010)
Repayment of principal portion of lease liabilities (Note 18, 19)		(274)	(234)
Dividends paid (Note 23)		(1,030)	(1,022)
Repurchase of common shares (Note 23)		(160)	(1,930)
Issuance of common shares (Note 23)		0	20
CASH USED IN FINANCING ACTIVITIES		(1,339)	(2,479)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS		3	(31)
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS		783	(1,643)
CASH AND CASH EQUIVALENTS - BEGINNING OF YEAR		671	2,314
CASH AND CASH EQUIVALENTS - END OF YEAR		1,454	671
Cash and cash equivalents comprised of:
Cash		1,375	532
Short-term investments		79	139
CASH AND CASH EQUIVALENTS - END OF YEAR		1,454	671
SUPPLEMENTAL CASH FLOWS DISCLOSURES
Interest paid		498	505
Income taxes paid		156	29
Total cash outflow for leases		$ 345	$ 345

[1]	All equity transactions were attributable to common shareholders.

Consolidated Statements of Chan

Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Millions	Total		Number of Common Shares [Member]	Share Capital [Member]	Contributed Surplus [Member]	Accumulated Other Comprehensive (Loss) Income ("AOCI") [Member]	Accumulated Other Comprehensive (Loss) Income ("AOCI") [Member]Net Fair Value Gain (Loss) on Investments [Member]	Accumulated Other Comprehensive (Loss) Income ("AOCI") [Member]Net Actuarial Gain on Defined Benefit Plans [Member]	[2]	Accumulated Other Comprehensive (Loss) Income ("AOCI") [Member]Loss on Currency Translation of Foreign Operations [Member]	Accumulated Other Comprehensive (Loss) Income ("AOCI") [Member]Other [Member]	Retained Earnings [Member]
Number of shares outstanding	608,535,477
Beginning balance at Dec. 31, 2018	$ 24,425	[1]		$ 16,740	$ 231	$ (291)	$ (7)	$ 0		$ (251)	$ (33)	$ 7,745
Net earnings	992	[1]	$ 0	0	0	0	0	0		0	0	992
Other comprehensive (loss) income	$ 36	[1]	$ 0	0	0	36	(25)	7		47	7	0	[1]
Shares repurchased (Note 23)	36,067,323		(36,067,323)
Shares repurchased (Note 23)	$ (1,878)	[1]		(992)	0	0	0	0		0	0	(886)
Dividends declared	(754)	[1]	$ 0	0	0	0	0	0		0	0	(754)
Effect of share-based compensation including issuance of common shares			474,655
Effect of share-based compensation including issuance of common shares	40	[1]		23	17	0	0	0		0	0	0
Transfer of net actuarial gain on defined benefit plans	0	[1]	$ 0	0	0	(7)	0	(7)		0	0	7
Transfer of net loss on sale of investment	0	[1]	0	0	0	3	3	0		0		(3)
Transfer of net loss on cash flow hedges	8	[1]	0	0	0	8	0	0		0	8	0
Ending balance at Dec. 31, 2019	$ 22,869	[1]		$ 15,771	248	(251)	(29)	0		(204)	(18)	7,101
Number of shares outstanding	572,942,809			572,942,809
Net earnings	$ 459	[1]	0	$ 0	0	0	0	0		0	0	459
Other comprehensive (loss) income	$ 194	[1]	$ 0	0	0	194	(7)	75		142	(16)	0
Shares repurchased (Note 23)	3,832,580		(3,832,580)
Shares repurchased (Note 23)	$ (160)	[1]		(105)	(55)	0	0	0		0	0	0
Dividends declared	(1,029)	[1]	$ 0	$ 0	0	0	0	0		0	0	(1,029)
Effect of share-based compensation including issuance of common shares			150,177	150,177
Effect of share-based compensation including issuance of common shares	19	[1]		$ 7	12	0	0	0		0	0	0
Transfer of net actuarial gain on defined benefit plans	0	[1]	$ 0	0	0	(75)	0	(75)		0	0	75
Transfer of net loss on cash flow hedges	13	[1]	$ 0	0	0	13	0	0		0	13	0
Ending balance at Dec. 31, 2020	$ 22,365	[1]		$ 15,673	$ 205	$ (119)	$ (36)	$ 0		$ (62)	$ (21)	$ 6,606
Number of shares outstanding	569,260,406			569,260,406

[1]	All equity transactions were attributable to common shareholders.
[2]	Any amounts incurred during a period we closed out to retain earnings at each period-end. Therefore, no balance exists at the beginning or end of period.

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Millions		Dec. 31, 2020	Dec. 31, 2019
Current assets
Cash and cash equivalents		$ 1,454	$ 671
Receivables (Note 11)		3,581	3,542
Inventories (Note 12)		4,930	4,975
Prepaid expenses and other current assets		1,505	1,477
Current assets		11,470	10,665
Non-current assets
Property, plant and equipment (Note 13)		19,660	20,335
Goodwill (Note 14)		12,198	11,986
Other intangible assets (Note 14)		2,388	2,428
Investments (Note 15)		562	821
Other assets (Note 16)		914	564
TOTAL ASSETS		47,192	46,799
Current liabilities
Short-term debt (Note 17)		159	976
Current portion of long-term debt (Note 18)		14	502
Current portion of lease liabilities (Note 19)		249	214
Payables and accrued charges (Note 20)		8,058	7,437
Current liabilities		8,480	9,129
Non-current liabilities
Long-term debt (Note 18)		10,047	8,553
Lease liabilities (Note 19)		891	859
Deferred income tax liabilities (Note 8)		3,149	3,145
Pension and other post-retirement benefit liabilities (Note 21)		454	433
Asset retirement obligations and accrued environmental costs (Note 22)		1,597	1,650
Other non-current liabilities		209	161
TOTAL LIABILITIES		24,827	23,930
SHAREHOLDERS' EQUITY
Share capital (Note 23)		15,673	15,771
Contributed surplus		205	248
Accumulated other comprehensive loss		(119)	(251)
Retained earnings		6,606	7,101
TOTAL SHAREHOLDERS' EQUITY	[1]	22,365	22,869
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY		$ 47,192	$ 46,799

[1]	All equity transactions were attributable to common shareholders.

Description of Business

Description of Business	12 Months Ended
Description of Business	Dec. 31, 2020
Text block [abstract]
Description of Business	NOTE 1 DESCRIPTION OF BUSINESS Nutrien Ltd. (collectively with its subsidiaries, “Nutrien”, “we”, “us”, “our” or “the Company”) is the world’s largest provider of crop inputs and services. Nutrien plays a critical role in helping growers around the globe increase food production in a sustainable manner. The Company is a corporation organized under the laws of Canada with its registered head office located at Suite 500, 122 – 1st Avenue South, Saskatoon, Saskatchewan, Canada. As at December 31, 2020 , the Company had assets as follows: Segment Description Nutrien Ag Solutions (“Retail”) various retail facilities across the US, Canada, Australia and South America private label and proprietary crop protection products and nutritionals an innovative integrated digital platform for growers and crop consultants Potash six operations in the province of Saskatchewan Nitrogen eight production facilities in North America: four in Alberta and one each in Georgia, Louisiana, Ohio and Texas one large-scale operation in Trinidad six upgrade facilities in North America: three in Alberta and one each in Georgia, Missouri, and Washington 50 percent investment in Profertil S.A. (“Profertil”), a nitrogen producer based in Argentina Phosphate two mines and processing plants: one in Florida and one in North Carolina phosphate feed plants in Illinois, Missouri and Nebraska an industrial phosphoric acid plant in Ohio Corporate and Others investment in Canpotex Limited (“Canpotex”), a Canadian potash export, sales and marketing company owned in equal shares by Nutrien and another potash producer 22 percent investment in Sinofert Holdings Limited (“Sinofert”), a fertilizer supplier and distributor in China

Basis of Presentation

Basis of Presentation	12 Months Ended
Basis of Presentation	Dec. 31, 2020
Text block [abstract]
Basis of Presentation	NOTE 2 BASIS OF PRESENTATION These consolidated financial statements have been prepared in accordance with International Financial Reporting Standards (“IFRS”) as issued by the International Accounting Standards Board (“IASB”). We have consistently applied the same accounting policies throughout all periods presented, as if these policies had always been in effect, with the exception of the accounting standards adopted effective January 1, 2020, as disclosed in Note 30 . Certain immaterial 2019 figures have been reclassified in the consolidated statements of earnings, segment information, nature of expenses and other (income) expenses. These consolidated financial statements were authorized for issue by the Board of Directors on February 18, 2021 . Sensitivity analyses included throughout the notes should be used with caution as the changes are hypothetical and not reflective of future performance. The sensitivities have been calculated independently of changes in other key variables. Changes in one factor may result in changes in another, which could increase or reduce certain sensitivities. These consolidated financial statements were prepared under the historical cost basis, except for items that IFRS requires to be measured at fair value. Details of our accounting policies are primarily disclosed in Note 30 . On March 11, 2020, the World Health Organization declared the spread of the novel strain of coronavirus (“COVID-19”) a global pandemic. We have assessed our accounting estimates and other matters that require the use of forecasted financial information for the impact of the COVID-19 pandemic. The assessment included estimates of the unknown future impacts of the pandemic using information that is reasonably available at this time. Accounting estimates and other matters assessed include the allowance for expected credit losses of receivables from customers, valuation of inventory, goodwill and other long-lived assets, financial assets, tax assets, pension obligations and assets, and revenue recognition. Based on the current assessment, there was not a material impact to these consolidated financial statements. As a result of the pandemic, we incurred directly attributable and incremental COVID-19 related expenses in other (income) expenses ( Note 6 ). As additional information becomes available, the future assessment of these estimates, including expectations about the severity, duration and scope of the pandemic, could differ materially in future reporting periods.

Segment Information

Segment Information	12 Months Ended
Segment Information	Dec. 31, 2020
Text block [abstract]
Segment Information	NOTE 3 SEGMENT INFORMATION The Company has four reportable operating segments: Nutrien Ag Solutions (“Retail”), Potash, Nitrogen and Phosphate. The Retail segment distributes crop nutrients, crop protection products, seed and merchandise, and it provides services directly to growers through a network of farm centers in North America, South America and Australia. The Potash, Nitrogen and Phosphate segments are differentiated by the chemical nutrient contained in the products that each produce. The Executive Leadership Team (“ELT”), comprised of officers at the Executive Vice President level and above, is the Chief Operating Decision Maker (“CODM”). In 2020, the CODM changed the measure used to evaluate the performance of our operating segments from net earnings (loss) before finance costs, income taxes, and depreciation and amortization (“EBITDA”) to adjusted EBITDA. The CODM considers adjusted EBITDA to be a more meaningful measure because it is not impacted by long-term investment and financing decisions, but rather focuses on the performance of our day-to-day operations. In addition, it provides a better indication of the segment’s performance compared to EBITDA as it excludes the impact of impairments and other costs that are centrally managed by our corporate function. Due to the change in the measurement of the segments, we have presented adjusted EBITDA for the comparative period. We determine the composition of the reportable segments based on factors including risks and returns, internal organization, and internal reports reviewed by the CODM. We allocate certain expenses across segments based on reasonable considerations such as production capacities or historical trends. Financial information on each of these segments is summarized in the following tables: Corporate 2020 Retail Potash Nitrogen Phosphate and Others Eliminations Consolidated Sales – third party 14,748 2,265 2,572 1,241 82 - 20,908 – intersegment 37 248 628 202 - (1,115) - Sales – total 14,785 2,513 3,200 1,443 82 (1,115) 20,908 Freight, transportation and distribution - 367 460 241 - (213) 855 Net sales 14,785 2,146 2,740 1,202 82 (902) 20,053 Cost of goods sold 11,049 1,183 2,265 1,166 74 (923) 14,814 Gross margin 3,736 963 475 36 8 21 5,239 Selling expenses 2,795 9 27 6 (24) - 2,813 General and administrative expenses 135 7 8 10 269 - 429 Provincial mining and other taxes - 201 1 - 2 - 204 Share-based compensation expense - - - - 69 - 69 Impairment of assets (Note 13) - 23 27 769 5 - 824 Other expenses (income) 44 8 (288) 6 228 - (2) Earnings (loss) before finance costs and income taxes 762 715 700 (755) (541) 21 902 Depreciation and amortization 668 452 599 218 52 - 1,989 EBITDA 1,430 1,167 1,299 (537) (489) 21 2,891 Acquisition and integration related costs - - 4 - 56 - 60 Share-based compensation expense - - - - 69 - 69 Impairment of assets (Note 13) - 23 27 769 5 - 824 COVID-19 related expenses - - - - 48 - 48 Foreign exchange loss, net of related derivatives - - - - 19 - 19 Loss on disposal of business - - - - 6 - 6 Net gain on disposal of investment in MOPCO (Note 15) - - (250) - - - (250) Adjusted EBITDA 1,430 1,190 1,080 232 (286) 21 3,667 Assets 20,526 12,032 10,612 1,462 2,983 (423) 47,192 Corporate 2019 Retail Potash Nitrogen Phosphate and Others Eliminations Consolidated Sales – third party 13,244 2,702 2,608 1,397 133 - 20,084 – intersegment 38 207 612 203 - (1,060) - Sales – total 13,282 2,909 3,220 1,600 133 (1,060) 20,084 Freight, transportation and distribution - 305 372 232 - (141) 768 Net sales 13,282 2,604 2,848 1,368 133 (919) 19,316 Cost of goods sold 9,981 1,103 2,148 1,373 133 (924) 13,814 Gross margin 3,301 1,501 700 (5) - 5 5,502 Selling expenses 2,484 9 25 5 (18) - 2,505 General and administrative expenses 112 6 15 7 264 - 404 Provincial mining and other taxes - 287 2 1 2 - 292 Share-based compensation expense - - - - 104 - 104 Impairment of assets (Note 13 and 14) - - - - 120 - 120 Other expenses (income) 69 (4) (46) 25 171 - 215 Earnings (loss) before finance costs and income taxes 636 1,203 704 (43) (643) 5 1,862 Depreciation and amortization 595 390 535 237 42 - 1,799 EBITDA 1,231 1,593 1,239 194 (601) 5 3,661 Merger and related costs - - - - 82 - 82 Acquisition and integration related costs - - - - 16 - 16 Share-based compensation expense - - - - 104 - 104 Impairment of assets (Note 13 and 14) - - - - 120 - 120 Foreign exchange loss, net of related derivatives - - - - 42 - 42 Adjusted EBITDA 1,231 1,593 1,239 194 (237) 5 4,025 Assets 19,990 11,696 10,991 2,198 2,129 (205) 46,799 Our Retail segment primarily generates revenue from sales of the following: Crop nutrients Dry and liquid macronutrient products including potash, nitrogen and phosphate, proprietary liquid micronutrient products and nutrient application services. Crop protection products Various third-party supplier and proprietary products designed to maintain crop quality and manage plant diseases, weeds, and other pests. Seed Various third-party supplier seed brands and proprietary seed product lines. Merchandise Fencing, feed supplements, livestock-related animal health products, storage and irrigation equipment, and other products. Nutrien Financial Financing solutions provided to Retail branches and customers in support of Nutrien’s agricultural product and service sales. Services and other revenues Product application, soil and leaf testing, crop scouting and precision agriculture services, water services and livestock marketing. Our Potash, Nitrogen and Phosphate segments generate revenue from sales of the following products: Products Sales prices impacted by Potash North American – primarily granular Offshore (international) – primarily granular and standard North American prices referenced at delivered prices (including transportation and distribution costs) International prices pursuant to term and spot contract prices (excluding transportation and distribution costs) Nitrogen Ammonia, urea, urea ammonium nitrate, industrial grade ammonium nitrate and ammonium sulfate Global energy costs and supply Phosphate Solid fertilizer, liquid fertilizer, industrial products and feed products Global prices and supplies of ammonia and sulfur Revenue reported under our Corporate and Others segment primarily relates to our non-core Canadian business, which was sold in 2020. Presented below is revenue from contracts with customers disaggregated by product line or geographic location for each reportable segment. 2020 2019 Retail sales by product line Crop nutrients 5,200 4,989 Crop protection products 5,602 4,983 Seed 1,790 1,712 Merchandise 943 598 Nutrien Financial 129 - Services and other 1,241 1,000 Nutrien Financial elimination 1 (120) - 14,785 13,282 Potash sales by geography Manufactured product North America 1,275 1,283 Offshore 2 1,238 1,625 Other potash and purchased products - 1 2,513 2,909 Nitrogen sales by product line Manufactured product Ammonia 779 884 Urea 1,040 1,019 Solutions, nitrates and sulfates 816 812 Other nitrogen and purchased products 565 505 3,200 3,220 Phosphate sales by product line Manufactured product Fertilizer 838 944 Industrial and feed 454 475 Other phosphate and purchased products 151 181 1,443 1,600 1 Represents elimination for the interest and service fees charged by Nutrien Financial to Retail branches. 2 Relates to Canpotex (Note 28). Financial information by geographic area is summarized in the following tables: Sales - Third Party Non-Current Assets 1 2020 2019 2020 2019 United States 12,373 12,561 15,268 15,685 Canada 2,565 2,504 17,435 17,503 Australia 3,231 1,961 1,305 1,172 Canpotex (Note 28) 1,238 1,625 - - Trinidad 101 113 644 691 Other 1,400 2 1,320 2 564 639 20,908 20,084 35,216 35,690 1 Excludes financial instruments (other than equity-accounted investees), deferred tax assets and post-employment benefit assets. 2 Other third-party sales primarily relate to Argentina of $372 (2019 – $404), Brazil of $284 (2019 – $109), Europe of $183 (2019 – $210), and Others of $561 (2019 – $597). Canpotex sales volumes by geographical area were as follows: Canpotex Sales by market (%) 2020 2019 Latin America 32 31 China 22 22 India 14 10 Other Asian markets 25 27 Other markets 7 10

Nature of Expenses

Nature of Expenses	12 Months Ended
Nature of Expenses	Dec. 31, 2020
Text block [abstract]
Nature of Expenses	NOTE 4 NATURE OF EXPENSES 2020 2019 Purchased and produced raw materials and product for resale 1 12,110 11,335 Depreciation and amortization 1,989 1,799 Employee costs 2 2,450 2,205 Freight 963 845 Impairment of assets (Note 13 and 14) 824 120 Provincial mining and other taxes 3 204 292 Offsite warehouse costs 60 51 Merger and related costs - 82 Acquisition and integration related costs 60 16 Contract services 617 567 Lease expense 4 60 66 Fleet fuel, repairs and maintenance 222 202 COVID-19 related expenses 48 - Net gain on disposal of investment in MOPCO (Note 15) (250) - Other 649 642 Total cost of goods sold and expenses 20,006 18,222 1 Significant expenses include: supplies, energy, fuel, purchases of raw material (natural gas – feedstock, sulfur, ammonia and reagents) and product for resale (crop nutrients and protection products, and seed). 2 Includes employee benefits and share-based compensation. 3 Includes Saskatchewan potash production tax, and Saskatchewan resource surcharge and other of $86 and $118 (2019 – $190 and $102), respectively, as required under Saskatchewan provincial legislation. 4 Includes lease expense relating to short-term leases, leases of low value and variable lease payments.

Share-Based Compensation

Share-Based Compensation	12 Months Ended
Share-Based Compensation	Dec. 31, 2020
Text block [abstract]
Share-Based Compensation	NOTE 5 SHARE-BASED COMPENSATION We have share-based compensation plans (including those assumed from Potash Corporation of Saskatchewan Inc. (“PotashCorp”) and Agrium Inc. (“Agrium”)) for eligible employees and directors as part of their remuneration package, including Stock Options, Performance Share Units (“PSUs”), Restricted Share Units (“RSUs”) and Deferred Share Units (“DSUs”). The following summarizes the Nutrien share-based compensation plans, under which we have awards available to be granted, and the assumed legacy plans of PotashCorp and Agrium, under which no awards will be granted: Plans Eligibility Granted Vesting Period Maximum Term Settlement Stock Options Officers and eligible employees Annually 25% per year over four years 10 years Shares PSUs Officers and eligible employees Annually On third anniversary of grant date based on total shareholder return over a three-year performance cycle, compared to average total shareholder return of a peer group of companies over the same period Not applicable Cash RSUs Eligible employees Annually On third anniversary of grant date and are not subject to performance conditions Not applicable Cash DSUs Non-executive directors At the discretion of the Board of Directors Fully vest upon grant Not applicable Cash 1 SARs/TSARs 2 Awards no longer granted; legacy awards only Awards no longer granted; legacy awards only 25% per year over four years 10 years Cash 1 Directors can redeem their DSUs for cash only when they leave the Board of Directors for an amount equal to the market value of the common shares at the time of redemption or as mandated by the Nutrien DSU Plan. 2 Under the assumed legacy Agrium stock appreciation rights (“SARs”) plan, holders of tandem stock appreciation rights (“TSARs”) have the ability to choose between (a) receiving in cash the price of our shares on the date of exercise in excess of the exercise price of the right or (b) receiving common shares by paying the exercise price of the right. Our past experience and future expectation is that substantially all TSAR holders will elect to choose the first option. The weighted average fair value of stock options granted was estimated as of the date of the grant using the Black-Scholes-Merton option-pricing model. The weighted average grant date fair value of stock options per unit granted in 2020 was $ 7.18 ( 2019 – $ 11.27 ). The weighted average assumptions by year of grant that impacted current year results are as follows: Year of Grant Assumptions Based On 2020 2019 Exercise price per option Quoted market closing price 1 42.23 53.54 Expected annual dividend yield (%) Annualized dividend rate 2 4.36 3.22 Expected volatility (%) Historical volatility 3 29 27 Risk-free interest rate (%) Zero-coupon government issues 4 1.51 2.55 Average expected life of options (years) Historical experience 8.5 7.5 1 Of common shares on the last trading day immediately preceding the date of the grant. 2 As of the date of the grant. 3 Of the Company’s share over a period commensurate with the expected life of the option. 4 Implied yield available on equivalent remaining term at the time of the grant. The following table summarizes the activity related to our stock option plans: Number of Shares Subject to Option Weighted Average Exercise Price 2020 2019 2020 2019 Outstanding – beginning of year 9,191,480 9,044,237 56.88 58.41 Granted 2,293,802 1,376,533 42.23 53.54 Exercised (123,403) (451,574) 42.24 42.73 Forfeited or cancelled (34,506) (502,016) 57.45 86.53 Expired (329,481) (275,700) 75.92 76.59 Outstanding – end of year 10,997,892 9,191,480 53.59 56.88 The aggregate grant-date fair value of all stock options granted in 2020 was $ 16 . The average share price in 2020 was $ 38.87 per share. The following table summarizes information about our stock options outstanding as at December 31, 2020 , with expiry dates ranging from May 2021 to February 2030 : Options Outstanding Options Exercisable Weighted Weighted Weighted Average Average Average Remaining Exercise Exercise Range of Exercise Prices Number Life in Years Price Number Price $37.84 to $41.60 1,647,297 5 38.71 1,647,297 38.71 $41.61 to $43.36 2,293,802 9 42.23 - 1 - $43.37 to $45.40 1,492,667 7 44.50 988,275 44.50 $45.41 to $52.75 2,239,358 5 48.74 2,098,294 48.91 $52.76 to $78.86 1,645,867 7 57.60 821,067 61.68 $78.87 to $130.78 1,678,901 2 94.31 1,678,901 94.31 10,997,892 6 53.59 7,233,834 57.97 1 Options granted in this range of exercise prices have not yet met the vesting period. Information for all employee and director share-based compensation plans is summarized below: Units Granted Units Outstanding Compensation Expense in 2020 as at December 31, 2020 2020 2019 Stock Options 2,293,802 10,997,892 14 19 PSUs 794,017 1,879,160 31 65 RSUs 486,194 1,304,858 22 18 DSUs 49,424 369,267 2 2 SARs/TSARs - 1,576,172 - - 69 104

Other (Income) Expenses

Other (Income) Expenses	12 Months Ended
Other (Income) Expenses	Dec. 31, 2020
Text block [abstract]
Other (Income) Expenses	NOTE 6 OTHER (INCOME) EXPENSES 2020 2019 Merger and related costs - 82 Acquisition and integration related costs 60 16 Foreign exchange loss, net of related derivatives 18 42 Earnings of equity-accounted investees (73) (66) Bad debt expense 6 24 COVID-19 related expenses 48 - Loss on disposal of business 6 - Net gain on disposal of investment in MOPCO (Note 15) (250) - Other expenses 183 117 (2) 215

Finance Costs

Finance Costs	12 Months Ended
Finance Costs	Dec. 31, 2020
Text block [abstract]
Finance Costs	NOTE 7 FINANCE COSTS 2020 2019 Interest expense Short-term debt 50 87 Long-term debt 392 387 Lease liabilities (Note 19) 34 34 COVID-19 related 19 - Unwinding of discount on asset retirement obligations (Note 22) 33 54 Interest on net defined benefit pension and other post-retirement plan obligations (Note 21) 13 15 Borrowing costs capitalized to property, plant and equipment (20) (18) Interest income (1) (5) 520 554 Borrowing costs capitalized to property, plant and equipment in 2020 were calculated by applying an average capitalization rate of 3.9 percent ( 2019 – 4.6 percent) to expenditures on qualifying assets.

Income Taxes

Income Taxes	12 Months Ended
Income Taxes	Dec. 31, 2020
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Income Taxes	NOTE 8 INCOME TAXES Income Taxes Included in Net Earnings We operate in a specialized industry and in several tax jurisdictions; as a result, our earnings are subject to various rates of taxation. The provision for income taxes differs from the amount that would have resulted from applying the Canadian statutory income tax rates to earnings (loss) before income taxes as follows: 2020 2019 Earnings (loss) before income taxes Canada 525 765 United States (506) 315 Australia 83 27 Trinidad (44) (28) Other 324 229 382 1,308 Canadian federal and provincial statutory income tax rate (%) 27 27 Income tax at statutory rates 103 353 Adjusted for the effect of: Recovery of prior year taxes due to US legislative changes (94) - Non-taxable income (59) (19) Change in recognition of tax losses and deductible temporary differences (20) - Impact of foreign tax rates (18) (45) Production-related deductions (12) (17) Impact of tax rate changes (3) 16 Non-deductible expenses 13 15 Foreign accrual property income 7 18 Other 6 (5) Income tax (recovery) expense included in net earnings (77) 316 Total income tax (recovery) expense, included in net earnings, was comprised of the following: 2020 2019 Current income tax Tax (recovery) expense for current year (38) 161 Adjustments in respect of prior years (30) (22) Total current income tax (recovery) expense (68) 139 Deferred income tax Origination and reversal of temporary differences 72 152 Adjustments in respect of prior years (58) 9 Change in recognition of tax losses and deductible temporary differences (20) - Impact of tax rate changes (3) 16 Total deferred income tax (recovery) expense (9) 177 Income tax (recovery) expense included in net earnings (77) 316 Deferred Income Taxes In respect of each type of temporary difference, unused tax loss and unused tax credit, the amounts of deferred tax assets and liabilities recognized in the consolidated balance sheets as at December 31 and the amount of the deferred tax (recovery) expense recognized in net earnings were: Deferred Income Tax (Recovery) Deferred Income Tax (Assets) Expense Recognized Liabilities in Net Earnings 2020 2019 2020 2019 Deferred income tax assets Asset retirement obligations and accrued environmental costs (376) (387) 20 25 Tax loss and other carryforwards (370) (270) (98) (9) Lease liabilities (201) (227) 26 55 Pension and other post-retirement benefit liabilities (161) (168) (12) (14) Long-term debt (102) (107) 3 3 Receivables (50) (51) 2 7 Inventories (37) (59) 20 (5) Payables and accrued charges - (25) 25 (5) Other assets (12) (22) 17 14 Deferred income tax liabilities Property, plant and equipment 3,637 3,647 (12) 147 Goodwill and other intangible assets 471 523 (67) (58) Payables and accrued charges 72 - 72 - Other liabilities 36 42 (5) 17 2,907 2,896 (9) 177 Reconciliation of net deferred income tax liabilities: 2020 2019 Balance – beginning of year 2,896 2,691 Business acquisitions (Note 25) - 29 Income tax (recovery) expense recognized in net earnings (9) 177 Income tax charge recognized in other comprehensive income ("OCI") 17 2 Other 3 (3) Balance – end of year 2,907 2,896 Amounts and expiry dates of unused tax losses and unused tax credits as at December 31, 2020 , were: Amount Expiry Date Unused federal operating losses 1,425 2021 – Indefinite Unused federal capital losses 583 Indefinite Unused investment tax credits 23 2021 – 2040 The unused tax losses and credits with no expiry dates can be carried forward indefinitely. As at December 31, 2020 , we had $ 735 of federal tax losses for which we did not recognize deferred tax assets. We have determined that it is probable that all recognized deferred tax assets will be realized through a combination of future reversals of temporary differences and taxable income. We did not recognize deferred tax liabilities related to temporary differences associated with investments in subsidiaries and equity-accounted investees amounting to $ 8,911 as at December 31, 2020 ( 2019 – $ 9,183 ). In 2020, previously unrecognized capital losses were utilized primarily as a result of the net gain on disposal of investment in MOPCO. In addition, as a result of the non-cash impairment of assets relating to our property, plant and equipment at White Springs, management revised its estimate of future taxable profits and derecognized deferred tax assets related to Florida tax losses and deductible temporary differences. In aggregate, the net decrease in unrecognized deferred tax assets was $20.

Net Earnings per Share

Net Earnings per Share	12 Months Ended
Net Earnings per Share	Dec. 31, 2020
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Net Earnings per Share	NOTE 9 NET EARNINGS PER SHARE 2020 2019 Weighted average number of common shares 569,657,000 582,269,000 Dilutive effect of stock options 29,000 777,000 Dilutive effect of share-settled PSUs - 56,000 Weighted average number of diluted common shares 569,686,000 583,102,000 Options excluded from the calculation of diluted net earnings per share due to the option exercise prices being greater than the average market price of common shares were as follows: 2020 2019 Number of options excluded 9,875,797 4,539,529 Performance option plan years fully excluded 2011 – 2017 2010 – 2015 Stock option plan years fully excluded 2015, 2017 – 2020 2015, 2019

Financial Instruments and Relat

Financial Instruments and Related Risk Management	12 Months Ended
Financial Instruments and Related Risk Management	Dec. 31, 2020
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Financial Instruments and Related Risk Management	NOTE 10 FINANCIAL INSTRUMENTS AND RELATED RISK MANAGEMENT Our ELT, along with the Board of Directors (including Board of Directors Committees), is responsible for monitoring our risk exposures and managing our policies to address these risks. Our strategic and risk management processes are integrated to ensure we understand the benefit from the relationship between strategy, risk and value creation. Outlined below are our risk management strategies we have developed to mitigate the financial market risks which we are exposed to. Credit Risk Risk Management Strategies Receivables from customers establish credit approval policies and procedures for new and existing customers extend credit to qualified customers through: review of credit agency reports, financial statements and/or credit references, as available review of existing customer accounts every 12 – 24 months based on the credit limit amounts evaluation of customer and country risk for international customers establish credit period: 15 and 30 days for wholesale fertilizer customers 30 days for industrial and feed customers 30 – 360 days for Retail, including Nutrien Financial, customers up to 180 days for select export sales customers, including Canpotex transact on a cash basis with certain customers who may not meet specified benchmark creditworthiness or cannot provide other evidence of ability to pay execute an agency arrangement with a financial institution with which we have only a limited recourse involvement sell receivables to financial institutions which substantially transfer the risks and rewards set eligibility requirements for Nutrien Financial to limit the risk of the receivables may require security over certain crop or livestock inventories set up provision using the lifetime expected credit loss method considering all possible default events over the expected life of a financial instrument. Receivables are grouped based on days past due and/or customer credit risk profile. Estimated losses on receivables are based on known troubled accounts and historical experience of losses incurred. Receivables are considered to be in default and are written off against the allowance when it is probable that all remaining contractual payments due will not be collected in accordance with the terms of the agreement Cash and cash equivalents and derivative assets require acceptable minimum counterparty credit ratings limit counterparty or credit exposure select counterparties with investment-grade quality Maximum exposure to credit risk as at December 31: 2020 2019 Cash and cash equivalents 1,454 671 Receivables 1 3,498 3,438 Other current assets – derivatives 45 5 4,997 4,114 1 Excluding income tax receivable. Risk Risk Management Strategies Liquidity establish an external borrowing policy to maintain sufficient liquid financial resources to fund our operations and meet our commitments and obligations in a cost-effective manner maintain an optimal capital structure maintain investment-grade credit ratings that provide ease of access to the debt capital and commercial paper markets maintain sufficient short-term credit availability uphold long-term relationships with a sufficient number of high-quality and diverse lenders Refer to Note 17 for our available credit facilities. The following maturity analysis of our financial liabilities and gross settled derivative contracts (for which the cash flows are settled simultaneously) is based on the expected undiscounted contractual cash flows from the date of the consolidated balance sheets to the contractual maturity date. Carrying Amount Contractual of Liability as at Cash Within 1 to 3 3 to 5 Over 5 2020 December 31 Flows 1 Year Years Years Years Short-term debt 1 159 159 159 - - - Payables and accrued charges 2 5,781 5,781 5,781 - - - Long-term debt, including current portion 1 10,061 15,795 434 2,378 2,498 10,485 Lease liabilities, including current portion 1 1,140 1,305 281 408 233 383 Derivatives 48 48 39 9 - - 17,189 23,088 6,694 2,795 2,731 10,868 1 Contractual cash flows include contractual interest payments related to debt obligations and lease liabilities. Interest rates on variable rate debt are based on prevailing rates as at December 31, 2020. 2 Excludes non-financial liabilities and includes trade payables of approximately $1.5 billion that are related to our prepaid inventory to secure product discounts. We consider these amounts to be part of our working capital. For these payables, we participated in arrangements where the vendors sold their right to receive payment to financial institutions without extending the original payment terms. These payables were paid in January and February 2021. Foreign Exchange Risk Risk Management Strategies Foreign currency denominated accounts execute foreign currency derivative contracts within certain prescribed limits for both forecast operating and capital expenditures to manage the earnings impact, including those related to our equity-accounted investees, that could occur from a reasonably possible strengthening or weakening of the US dollar The fair value of our net foreign exchange currency derivative assets (liabilities) at December 31, 2020 was $14 (2019 – $2). The following table presents the significant foreign currency derivatives that existed at December 31: 2020 2019 Average Average contract contract Sell/buy Notional Maturities rate Notional Maturities rate Derivatives not designated as hedges Forwards USD/CAD 1 514 2021 1.2796 337 2020 1.3096 CAD/USD 126 2021 1.2804 120 2020 1.3138 USD/AUD 2 28 2021 1.3661 78 2020 1.4593 AUD/USD 92 2021 1.3640 47 2020 1.4563 Options USD/CAD - buy USD puts 70 2021 1.3147 - - - USD/CAD - sell USD calls 55 2021 1.3665 - - - AUD/USD - buy USD calls 61 2021 1.3216 - - - Derivatives designated as hedges Forwards USD/CAD 254 2021 1.3190 - - - 1 Canadian dollar 2 Australian dollar Market Risks Type Risk Management Strategies Interest rate Short-term and long-term debt use a portfolio of fixed and floating rate instruments align current and long-term assets with demand and fixed-term debt monitor the effects of market changes in interest rates use interest rate swaps, if desired We do not believe we have material exposure to interest or price risk on our financial instruments as at December 31, 2020 and 2019. Price Natural gas derivative instruments diversify our forecast gas volume requirements, including a portion of annual requirements purchased at spot market prices, a portion at fixed prices (up to 10 years) and a portion indexed to the market price of ammonia acquire a reliable supply of natural gas feedstock and fuel on a location-adjusted, cost-competitive basis Price Investment at fair value ensure the security of principal amounts invested provide for an adequate degree of liquidity achieve a satisfactory return In 2020, we entered into cash flow hedges on our interest rate derivative contracts which matured in the same year and had a total notional amount of $680. Natural gas derivatives outstanding: 2020 2019 Average Fair Value Average Fair Value Contract of Assets Contract of Assets Notional 1 Maturities Price 2 (Liabilities) Notional 1 Maturities Price 2 (Liabilities) NYMEX swaps 14 2021 – 2022 3.89 (18) 16 2020 – 2022 4.26 (30) 1 In millions of Metric Million British Thermal Units (“MMBtu”). 2 US dollars per MMBtu. 2020 2019 Net Amounts Net Amounts Financial assets (liabilities) Gross Offset Presented Gross Offset Presented Derivative instrument liabilities Natural gas derivatives 1 (18) - (18) (30) - (30) Other long-term debt instruments 2 (150) 150 - (150) 150 - (168) 150 (18) (180) 150 (30) 1 Cash margin deposits of $9 (2019 – $17) were placed with counterparties related to legally enforceable master netting arrangements. 2 Back-to-back loan arrangements that are not subject to any financial test covenants but are subject to certain customary covenants and events of default. We were in compliance with these covenants as at December 31, 2020. Fair Value Financial instruments included in the consolidated balance sheets are measured either at fair value or amortized cost. The following tables explain the valuation methods used to determine the fair value of each financial instrument and its associated level in the fair value hierarchy. Financial Instruments at Fair Value Fair Value Method Cash and cash equivalents Carrying amount (approximation to fair value assumed due to short-term nature) Equity securities Closing bid price of the common shares as at the balance sheet date Debt securities Closing bid price of the debt or other instruments with similar terms and credit risk (Level 2) as at the balance sheet date Foreign currency derivatives not traded in an active market Quoted forward exchange rates (Level 2) as at the balance sheet date Foreign exchange forward contracts, swaps and options and natural gas swaps not traded in an active market Based on a discounted cash flow model. Inputs included contractual cash flows based on prices for natural gas futures contracts, fixed prices and notional volumes specified by the swap contracts, the time value of money, liquidity risk, our own credit risk (related to instruments in a liability position) and counterparty credit risk (related to instruments in an asset position). Futures contract prices used as inputs in the model were supported by prices quoted in an active market and therefore categorized in Level 2. Financial Instruments at Amortized Cost Fair Value Method Receivables, short-term debt and payables and accrued charges Carrying amount (approximation to fair value assumed due to short-term nature) Long-term debt Quoted market prices (Level 1 or 2 depending on the market liquidity of the debt) Other long-term debt instruments Carrying amount The following table presents our fair value hierarchy for financial instruments carried at fair value on a recurring basis or measured at amortized cost: 2020 2019 Carrying Carrying Financial assets (liabilities) measured at Amount Level 1 1 Level 2 1 Amount Level 1 1 Level 2 1 Fair value on a recurring basis Cash and cash equivalents 1,454 - 1,454 671 - 671 Derivative instrument assets 45 - 45 5 - 5 Other current financial assets – marketable securities 2 161 24 137 193 27 166 Investment at fair value through other comprehensive income ("FVTOCI") (Note 15) 153 153 - 161 161 - Derivative instrument liabilities (48) - (48) (33) - (33) Amortized cost Current portion of long-term debt Notes and debentures - - - (494) - (503) Fixed and floating rate debt (14) - (14) (8) - (8) Long-term debt Notes and debentures (9,994) (3,801) (7,955) (8,528) (1,726) (7,440) Fixed and floating rate debt (53) - (53) (25) - (25) 1 During 2020 and 2019, there were no transfers between Level 1 and Level 2 for financial instruments measured at fair value on a recurring basis. Our policy is to recognize transfers at the end of the reporting period. 2 Marketable securities consist of equity and fixed income securities.

Receivables

Receivables	12 Months Ended
Receivables	Dec. 31, 2020
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Receivables	NOTE 11 RECEIVABLES Segment 2020 2019 Receivables from customers Third parties Retail (Nutrien Financial) 1 1,417 826 Retail 1,158 1,682 Potash, Nitrogen, Phosphate 391 428 Related party - Canpotex Potash (Note 28) 122 194 Less allowance for expected credit losses of receivables from customers (69) (83) 3,019 3,047 Rebates 256 190 Income taxes (Note 8) 83 104 Other receivables 223 201 3,581 3,542 1 Includes $1,147 of very low risk of default and $270 of low risk of default (2019 - $762 of very low risk of default and $64 of low risk of default). Qualifying receivables from customers financed by Nutrien Financial represents high-quality receivables from customers that have been rated very low to low risk of default among Retail’s receivables from customers. Customer credit with a financial institution of $ 444 at December 31, 2020 , related to our agency agreement, is not recognized in our consolidated balance sheets. Through the agency agreement, we only have a limited recourse involvement to the extent of an indemnification of the financial institution to a maximum of 5 percent ( 2019 – 5 percent) of the qualified customer loans. Historical indemnification losses on this arrangement have been negligible, and the average aging of the customer loans with the financial institution is current.

Inventories

Inventories	12 Months Ended
Inventories	Dec. 31, 2020
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Inventories	NOTE 12 INVENTORIES 2020 2019 Product purchased for resale 1 3,655 3,592 Finished products 384 524 Intermediate products 227 244 Raw materials 215 205 Materials and supplies 449 410 4,930 4,975 1 Includes biological assets of $7 (December 31, 2019 – $33) measured at fair value less costs of disposal ("FVLCD"). Inventories expensed to cost of goods sold during the year were $ 14,347 ( 2019 – $ 13,465 ).

Property, Plant and Equipment

Property, Plant and Equipment	12 Months Ended
Property, Plant and Equipment	Dec. 31, 2020
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Property, Plant and Equipment	NOTE 13 PROPERTY, PLANT AND EQUIPMENT The majority of our tangible assets are buildings, machinery and equipment used to produce or distribute our products and render our services. Right-of-use (“ROU”) assets primarily include railcars, marine vessels, real estate and mobile equipment. Machinery Mine Land and Buildings and and Development Assets Under Improvements Improvements Equipment Costs Construction Total Useful life range (years) 2 – 80 1 – 60 1 – 80 2 – 60 n/a Carrying amount – December 31, 2019 1,160 6,409 10,641 747 1,378 20,335 Acquisitions (Note 25) 8 27 42 - - 77 Additions 25 91 224 1 1,077 1,418 Additions – ROU assets - 24 299 - - 323 Disposals (5) (9) (34) - - (48) Transfers 46 58 923 164 (1,191) - Foreign currency translation and other (15) - 30 30 (10) 35 Depreciation (39) (198) (1,060) (82) - (1,379) Depreciation – ROU assets (2) (55) (222) - - (279) Impairment (88) (42) (507) (137) (48) (822) Carrying amount – December 31, 2020 1,090 6,305 10,336 723 1,206 19,660 Balance – December 31, 2020 comprised of: Cost 1,530 8,377 19,730 2,279 1,206 33,122 Accumulated depreciation and impairments (440) (2,072) (9,394) (1,556) - (13,462) Carrying amount – December 31, 2020 1,090 6,305 10,336 723 1,206 19,660 Balance – December 31, 2020 comprised of: Owned property, plant and equipment 1,061 5,986 9,665 723 1,206 18,641 ROU assets 29 319 671 - - 1,019 Carrying amount – December 31, 2020 1,090 6,305 10,336 723 1,206 19,660 Carrying amount – December 31, 2018 1,018 6,044 9,882 709 1,143 18,796 ROU assets recognized on adoption of IFRS 16, "Leases" ("IFRS 16") 48 307 704 - - 1,059 Acquisitions (Note 25) 17 136 61 - 37 251 Additions 14 30 225 - 1,487 1,756 Additions – ROU assets - 22 177 - - 199 Disposals (3) (5) (84) - - (92) Transfers 108 145 932 110 (1,295) - Foreign currency translation and other (4) (37) (14) 5 6 (44) Depreciation (36) (187) (1,004) (77) (1,304) Depreciation – ROU assets (2) (46) (186) - - (234) Impairment - - (52) - - (52) Carrying amount – December 31, 2019 1,160 6,409 10,641 747 1,378 20,335 Balance – December 31, 2019 comprised of: Cost 1,474 8,207 18,548 2,068 1,378 31,675 Accumulated depreciation and impairments (314) (1,798) (7,907) (1,321) - (11,340) Carrying amount – December 31, 2019 1,160 6,409 10,641 747 1,378 20,335 Balance – December 31, 2019 comprised of: Owned property, plant and equipment 1,117 6,065 9,973 747 1,378 19,280 ROU assets 43 344 668 - - 1,055 Carrying amount – December 31, 2019 1,160 6,409 10,641 747 1,378 20,335 n/a = not applicable Depreciation of property, plant and equipment was included in the following: 2020 2019 Freight, transportation and distribution 138 137 Cost of goods sold 1,111 1,008 Selling expenses 393 344 General and administrative expenses 56 40 1,698 1,529 Depreciation recorded in inventory 132 161 1,830 1,690 Impairment In 2020, we recorded the following impairments: Cash-generating units ("CGUs") Aurora White Springs Segment Phosphate Impairment indicator Lower long-term forecasted global phosphate prices Pre-tax impairment loss ($) 545 215 Recoverable amount ($) 995 (post-tax) 160 (pre-tax) Valuation technique FVLCD a Level 3 measurement Value in use ("VIU") Key assumptions End of mine life (proven and probable reserves) (year) 2050 2029 Post-tax discount rate (%) 10.5 12.0 (pre-tax - 16.0) For our Aurora CGU, the recoverable amount was based on after-tax discounted cash flows (using a five-year projection and a terminal year thereafter to the expected mine life), which incorporated assumptions an independent market participant would apply. For our White Springs CGU, the recoverable amount was based on pre-tax discounted cash flows until the end of the mine life. The recoverable amount is most sensitive to the following key assumptions: our internal sales price forecasts, which consider projections from independent third-party data sources, discount rates, and expected mine life. We used key assumptions that were based on historical data and estimates of future results from internal sources, external price benchmarks, and mineral reserve technical reports, as well as industry and market trends. The following table highlights sensitivities to the recoverable amount which could result in additional impairment losses or reversals of previously recorded losses: Aurora Key Assumptions Change in Assumption Increase (Decrease) to Recoverable Amount ($) Net selling price ± 10 per tonne ± 150 Discount rate ± 1.0 percentage point ± 120 For our White Springs CGU, there were no reasonably possible changes in the key assumptions that would result in a substantial change in the recoverable amount. We also performed impairment testing on the Trinidad CGU, part of our Nitrogen segment, due to the indefinite closure of an ammonia plant in response to market conditions and lower long-term forecasted global ammonia prices. No impairment resulted from comparing the carrying amount of the Trinidad CGU to its recoverable amount determined on a FVLCD methodology. FVLCD was based on after-tax discounted cash flows (using a five-year projection and a 2.0% terminal growth rate) discounted at a post-tax rate of 12.6%. The following table indicates the percentages by which key assumptions would need to change individually for the estimated Trinidad CGU recoverable amount to be equal to the carrying amount: Key Assumptions Change Required for Carrying Amount to Equal Recoverable Amount Net selling price (5-year average) 4 percent decrease Production volumes (5-year average) 5 percent decrease Discount rate (post-tax) 0.9 percentage point increase In 2020, we also recorded $64 of impairment losses relating to other non-current assets (2019 - $52).

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	12 Months Ended
Goodwill and Other Intangible Assets	Dec. 31, 2020
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Goodwill and Other Intangible Assets	NOTE 14 GOODWILL AND OTHER INTANGIBLE ASSETS Other Intangibles Customer Trade Goodwill Relationships 2 Technology Names Other Total Useful life range (years) n/a 3 – 15 3 – 30 1 – 20 ³ 1 – 20 Carrying amount – December 31, 2019 11,986 1,584 351 62 431 2,428 Acquisitions (Note 25) 167 74 2 8 6 90 Additions – internally developed - - 106 - 16 122 Foreign currency translation and other 45 22 20 14 (22) 34 Disposals - - (3) - - (3) Amortization 1 - (165) (39) (9) (70) (283) Carrying amount – December 31, 2020 12,198 1,515 437 75 361 2,388 Balance – December 31, 2020 comprised of: Cost 12,205 1,971 544 111 597 3,223 Accumulated amortization and impairment (7) (456) (107) (36) (236) (835) Carrying amount – December 31, 2020 12,198 1,515 437 75 361 2,388 Carrying amount – December 31, 2018 11,431 1,554 117 90 449 2,210 Acquisitions (Note 25) 543 173 43 13 115 344 Additions – internally developed - - 197 - 2 199 Foreign currency translation and other 12 2 9 18 (25) 4 Impairment - - - (35) (33) (68) Amortization 1 - (145) (15) (24) (77) (261) Carrying amount – December 31, 2019 11,986 1,584 351 62 431 2,428 Balance – December 31, 2019 comprised of: Cost 11,993 1,906 429 92 597 3,024 Accumulated amortization and impairment (7) (322) (78) (30) (166) (596) Carrying amount – December 31, 2019 11,986 1,584 351 62 431 2,428 1 Amortization of $254 was included in selling expenses during the year ended December 31, 2020 (2019 – $234). 2 The average remaining amortization period of customer relationships at December 31, 2020, was approximately 6 years. 3 Certain trade names have indefinite useful lives as there are no regulatory, legal, contractual, cooperative, economic or other factors that limit their useful lives. Goodwill Impairment Testing We performed our annual impairment test on goodwill and did not identify any impairment; however, the recoverable amount for Retail – North America did not substantially exceed its carrying amount. In testing for impairment of goodwill, we calculate the recoverable amount for a CGU or groups of CGUs containing goodwill. We used the FVLCD methodology based on after-tax discounted cash flows (five-year projections and a terminal year thereafter) and incorporated assumptions an independent market participant would apply. We adjusted discount rates for each CGU or group of CGUs for the risk associated with achieving our forecasts (five-year projections) and for the country risk premium in which we expect to generate cash flows. FVLCD is a Level 3 measurement. We use our market capitalization and comparative market multiples to corroborate discounted cash flow results. The key assumptions with the greatest influence on the calculation of the recoverable amounts are the discount rates, terminal growth rates and cash flow forecasts. The key forecast assumptions were based on historical data and estimates of future results from internal sources as well as industry and market trends. For each CGU or group of CGUs, terminal growth rates and discount rates used were as follows: Terminal Growth Rate (%) Discount Rate (%) 2020 2019 2020 2019 Retail – North America 2.5 2.5 7.5 7.0 Retail – International 1 2.0 2.0 7.8 - 16.0 7.5 - 15.0 Potash 2.5 2.5 8.0 8.0 Nitrogen 2.0 2.0 8.0 9.0 1 The discount rates reflect the country risk premium and size for our international groups of CGUs. The Retail – North America group of CGUs recoverable amount exceeds its carrying amount by $ 1.7 billion, which is 13 % of the carrying amount. Most of our goodwill arose from the merger between PotashCorp and Agrium in 2018 (the “Merger”), representing fair values at the merger date. Goodwill is more susceptible to impairment risk if business operating results or economic conditions deteriorate and we do not meet our forecasts. A reduction in the terminal growth rate, an increase in the discount rate or a decrease in forecasted EBITDA could cause impairment in the future. The following table indicates the percentage by which key assumptions would need to change individually for the estimated recoverable amount to be equal to the carrying amount: Change Required for Carrying Amount to Equal Recoverable Value Used in Impairment Key Assumptions Amount Model Terminal growth rate 0.8 percentage point decrease 2.5% Forecasted EBITDA over forecast period 9.1 percent decrease $6 billion Discount rate 0.7 percentage point increase 7.5%

Investments

Investments	12 Months Ended
Investments	Dec. 31, 2020
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Investments	NOTE 15 INVESTMENTS Equity-accounted investees and investments at FVTOCI as at December 31 were comprised of: Principal Place Proportion of Ownership Interest of Business and and Voting Rights Held (%) Carrying Amount Name Principal Activity Incorporation 2020 2019 2020 2019 Equity-accounted investees MOPCO Nitrogen Producer Egypt - 26 - 270 Profertil Nitrogen Producer Argentina 50 50 233 212 Canpotex Marketing and Logistics Canada 50 50 - - Other associates and joint ventures 176 178 Total equity-accounted investees 409 660 Investments at FVTOCI Sinofert Fertilizer Supplier and Distributor China/Bermuda 22 22 153 161 Total investments at FVTOCI 153 161 In 2020, as a result of our strategic decision to dispose of our investment in MOPCO, we received cash consideration of $540 for the disposal of the investment and settlement of legal claims. This resulted in a pre-tax gain of $250 recorded in other (income) expenses. We continuously assess our ability to exercise significant influence or joint control over our investments. Our 22 percent ownership in Sinofert does not constitute significant influence as we do not have any representation on the Board of Directors of Sinofert. We elected to account for our investment in Sinofert as FVTOCI as it is held for strategic purposes. Future conditions related to Profertil may be affected by political, economic and social instability. We are exposed to foreign exchange risk related to fluctuations in the Argentine peso against the US dollar. This may also restrict our ability to obtain dividends from Profertil.

Other Assets

Other Assets	12 Months Ended
Other Assets	Dec. 31, 2020
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Other Assets	NOTE 16 OTHER ASSETS Other assets as at December 31 were comprised of: 2020 2019 Deferred income tax assets (Note 8) 242 249 Ammonia catalysts – net of accumulated amortization of $76 (2019 – $71) 89 89 Long-term income tax receivable (Note 8) 305 36 Accrued pension benefit assets (Note 21) 109 25 Other – net of accumulated amortization of $44 (2019 – $41) 169 165 914 564

Short-Term Debt

Short-Term Debt	12 Months Ended
Short-Term Debt	Dec. 31, 2020
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Short-Term Debt	NOTE 17 SHORT-TERM DEBT We use our $4.5 billion commercial paper program for our short-term cash requirements. The commercial paper program is backstopped by the $4.5 billion unsecured revolving term credit facility (“Nutrien Credit Facility”). Short-term facilities are renegotiated periodically. Short-term debt as at December 31 was comprised of: Rate of Interest (%) Total Facility Limit as at December 31, 2020 2020 2019 Credit facilities Unsecured revolving term credit facility 1 Nil 4,500 - - Uncommitted revolving demand facility Nil 500 - - Other credit facilities 2 0.8 – 36.0 740 159 326 Commercial paper Nil - 650 159 976 1 Matures April 10, 2023, subject to extension at the request of Nutrien provided that the resulting maturity date shall not exceed five years from the date of request. 2 Credit facilities are unsecured and consist of South American facilities with debt of $109 (2019 – $149) and interest rates ranging from 1.7 percent to 36.0 percent, Australian facilities with debt of $19 (2019 – $157) and an interest rate of 0.8 percent, and other facilities with debt of $31 (2019 – $20) and an interest rate of 1.0 percent. The amount available under the commercial paper program is limited to the availability of backup funds under the Nutrien Credit Facility and excess cash invested in highly liquid securities. As at December 31, 2020 , we were authorized to issue commercial paper up to $4,500 ( 2019 – $4,500). Principal covenants and events of default under the Nutrien Credit Facility include a debt to capital ratio (refer to Note 24 ) and other customary events of default and covenant provisions. Non-compliance with such covenants could result in accelerated repayment and/or termination of the credit facility. We were in compliance with all covenants as at December 31, 2020 . In 2020, we entered into new committed revolving credit facilities totaling approximately $1,500, all with the same principal covenants and events of default as our existing credit facilities. We closed these credit facilities after the issuance of the new notes as described in Note 18 .

Long-Term Debt

Long-Term Debt	12 Months Ended
Long-Term Debt	Dec. 31, 2020
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Long-Term Debt	NOTE 18 LONG-TERM DEBT We source our borrowings for funding purposes primarily through notes, debentures and long-term credit facilities. We have access to the capital markets through our base shelf prospectus. Long-term debt as at December 31 was comprised of: Rate of Interest (%) Maturity 2020 2019 Notes 1 4.875 March 30, 2020 - 500 3.150 October 1, 2022 500 500 1.900 May 13, 2023 500 - 3.500 June 1, 2023 500 500 3.625 March 15, 2024 750 750 3.375 March 15, 2025 550 550 3.000 April 1, 2025 500 500 4.000 December 15, 2026 500 500 4.200 April 1, 2029 750 750 2.950 May 13, 2030 500 - 4.125 March 15, 2035 450 450 7.125 May 23, 2036 300 300 5.875 December 1, 2036 500 500 5.625 December 1, 2040 500 500 6.125 January 15, 2041 500 500 4.900 June 1, 2043 500 500 5.250 January 15, 2045 500 500 5.000 April 1, 2049 750 750 3.950 May 13, 2050 500 - Debentures 1 7.800 February 1, 2027 125 125 Other 67 33 9,742 8,708 Add net unamortized fair value adjustments 404 424 Less net unamortized debt issue costs (85) (77) 10,061 9,055 Less current maturities (14) (508) Add current portion of net unamortized debt issue costs - 6 (14) (502) 10,047 8,553 1 Each series of notes and debentures is unsecured and has no sinking fund requirements prior to maturity. Each series is redeemable and has various provisions that allow redemption prior to maturity, at our option, at specified prices. We are subject to certain customary covenants including limitation on liens, merger and change of control covenants, and customary events of default. As calculated in Note 24 , we were in compliance with these covenants as at December 31, 2020 . The following is a summary of changes in liabilities arising from financing activities: Short-Term Debt Current and Current Portion of Portion of Lease Long-Term Lease Long-Term Debt Liabilities Debt Liabilities Total Balance – December 31, 2019 1,478 214 8,553 859 11,104 Cash flows 1 (1,401) (274) 1,526 - (149) Additions and other adjustments to ROU assets - 107 - 213 320 Reclassifications 11 194 (11) (194) - Foreign currency translation and other non-cash changes 85 8 (21) 13 85 Balance – December 31, 2020 173 249 10,047 891 11,360 Balance – December 31, 2018 1,624 8 7,579 12 9,223 Adoption of IFRS 16 (Note 13) - 196 - 863 1,059 Cash flows 1 (794) (234) 1,481 - 453 Additions and other adjustments to ROU assets - 50 - 75 125 Reclassifications 500 178 (500) (178) - Foreign currency translation and other non-cash changes 148 16 (7) 87 244 Balance – December 31, 2019 1,478 214 8,553 859 11,104 1 Cash inflows and cash outflows are presented on a net basis.

Lease Liabilities

Lease Liabilities	12 Months Ended
Lease Liabilities	Dec. 31, 2020
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Lease Liabilities	NOTE 19 LEASE LIABILITIES Average Rate of Interest (%) 2020 2019 Lease liabilities - non-current 3.0 891 859 Current portion of lease liabilities 2.7 249 214 Total 1,140 1,073

Payables and Accrued Charges

Payables and Accrued Charges	12 Months Ended
Payables and Accrued Charges	Dec. 31, 2020
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Payables and Accrued Charges	NOTE 20 PAYABLES AND ACCRUED CHARGES Payables and accrued charges consist primarily of amounts we owe to suppliers and prepayments made by customers planning to purchase our products for the upcoming growing season. Payables and accrued charges as at December 31 were comprised of: 2020 2019 Trade and other payables 4,415 4,016 Customer prepayments 1,800 1,693 Dividends 256 258 Accrued compensation 513 434 Current portion of asset retirement obligations and accrued environmental costs (Note 22) 162 148 Accrued interest 99 103 Current portion of share-based compensation (Note 5) 95 118 Current portion of derivatives 39 13 Income taxes (Note 8) 48 43 Current portion of pension and other post-retirement benefits (Note 21) 15 15 Other accrued charges and others 616 596 8,058 7,437

Pension and Other Post-Retireme

Pension and Other Post-Retirement Benefits	12 Months Ended
Pension and Other Post-Retirement Benefits	Dec. 31, 2020
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Pension and Other Post-Retirement Benefits	NOTE 21 PENSION AND OTHER POST-RETIREMENT BENEFITS We offer the following pension and other post-retirement benefits to qualified employees: defined benefit pension plans; defined contribution pension plans; and health, disability, dental and life insurance (referred to as other defined benefit) plans. Substantially all our employees participate in at least one of these plans. Description of Defined Benefit Pension Plans We sponsor defined benefit pension plans as follows: Plan Type Contributions United States non-contributory, guaranteed annual pension payments for life, benefits generally depend on years of service and compensation level in the final years leading up to age 65, benefits available starting at age 55 at a reduced rate, and plans provide for maximum pensionable salary and maximum annual benefit limits. made to meet or exceed minimum funding requirements of the Employee Retirement Income Security Act of 1974 and associated Internal Revenue Service regulations and procedures. Canada made to meet or exceed minimum funding requirements based on provincial statutory requirements and associated federal taxation rules. Supplemental Plans in US and Canada for Senior Management non-contributory, unfunded, and supplementary pension benefits. provided for by charges to earnings sufficient to meet the projected benefit obligations, and payments to plans are made as plan payments to retirees occur. Our defined benefit pension plans are funded with separate funds that are legally separated from the Company and administered through an employee benefits or management committee in each country, which is composed of our employees. The employee benefits or management committee is required by law to act in the best interests of the plan participants and, in the US and Canada, is responsible for the governance of the plans, including setting certain policies (e.g., investment and contribution) of the funds. The current investment policy for each country’s plans generally does not include any asset/liability matching strategies or currency hedging strategies. Plan assets held in trusts are governed by local regulations and practices in each country, as is the nature of the relationship between the Company and the trustees and their composition. Description of Other Post-Retirement Plans We provide health care plans for certain eligible retired employees in the US, Canada and Trinidad. Eligibility for these benefits is generally based on a combination of age and years of service at retirement. Certain terms of the plans include: coordination with government-provided medical insurance in each country; certain unfunded cost-sharing features such as co-insurance, deductibles and co-payments – benefits subject to change; for certain plans, maximum lifetime benefits; at retirement, the employee’s spouse and certain dependent children may be eligible for coverage; benefits are self-insured and are administered through third-party providers; and generally, retirees contribute toward annual cost of the plans. We provide non-contributory life insurance plans for certain retired employees who meet specific age and service eligibility requirements. Risks The defined benefit pension and other post-retirement plans expose us to broadly similar actuarial risks. The most significant risks include investment risk and interest rate risk as discussed below. Other risks include longevity risk and salary risk. Investment Risk A deficit will be created if plan assets underperform the discount rate used in the defined benefit obligation valuation. To mitigate investment risk, we employ: a total return on investment approach whereby a diversified mix of equities and fixed income investments is used to maximize long-term return for a prudent level of risk; and risk tolerance established through careful consideration of plan liabilities, plan funded status and corporate financial condition. Other assets such as private equity and hedge funds are not used at this time. Our policy is not to invest in commodities, precious metals, mineral rights, bullions or collectibles. Investment risk is measured and monitored on an ongoing basis through quarterly investment portfolio reviews, annual liability measurements and periodic asset/liability studies. Interest Rate Risk A decrease in bond interest rates will increase the pension liability; however, this is generally expected to be partially offset by an increase in the return on the plan’s debt investments. Financial Information Movements in the pension and other post-retirement benefit assets (liabilities) were as follows: 2020 2019 Plan Plan Obligation Assets Net Obligation Assets Net Balance – beginning of year (2,044) 1,621 (423) (1,797) 1,416 (381) Components of defined benefit expense recognized in earnings Current service cost for benefits earned during the year (36) - (36) (40) - (40) Interest (expense) income (66) 53 (13) (74) 59 (15) Past service cost, including curtailment gains and settlements 1 133 (132) 1 - - - Foreign exchange rate changes and other (3) (1) (4) (29) 13 (16) Subtotal of components of defined benefit expense (recovery) recognized in earnings 28 (80) (52) (143) 72 (71) Remeasurements of the net defined benefit liability recognized in OCI during the year Actuarial gain arising from: Changes in financial assumptions (153) - (153) (199) - (199) Changes in demographic assumptions 12 - 12 14 - 14 Gain on plan assets (excluding amounts included in net interest) - 230 230 - 193 193 Subtotal of remeasurements (141) 230 89 (185) 193 8 Cash flows Contributions by plan participants (5) 5 - (5) 5 - Employer contributions - 26 26 - 21 21 Benefits paid 96 (96) - 86 (86) - Subtotal of cash flows 91 (65) 26 81 (60) 21 Balance – end of year 2 (2,066) 1,706 (360) (2,044) 1,621 (423) Balance comprised of: Non-current assets Other assets (Note 16) 109 25 Current liabilities Payables and accrued charges (Note 20) (15) (15) Non-current liabilities Pension and other post-retirement benefit liabilities (454) (433) 1 During 2020, we transferred certain pension plan obligations to an insurance company. 2 Obligations arising from funded and unfunded pension plans are $(1,690) and $(376), respectively (2019 – $(1,652) and $(392)). Other post-retirement benefit plans have no plan assets and are unfunded. Plan Assets As at December 31, the fair value of plan assets of our defined benefit pension plans, by asset category, were as follows: 2020 2019 Quoted Prices Quoted Prices in Active in Active Markets for Markets for Identical Assets Other 1 Total Identical Assets Other 1 Total Cash and cash equivalents 9 33 42 8 112 120 Equity securities and equity funds US 19 879 898 1 571 572 International 158 - 158 35 62 97 Debt securities 2 - 571 571 - 698 698 International balanced fund - - - - 112 112 Other - 37 37 - 22 22 Total pension plan assets 186 1,520 1,706 44 1,577 1,621 1 Approximately 76 percent (2019 – 60 percent) of the Other plan assets are held in funds whose fair values are estimated using their net asset value per share. For the majority of these funds, the redemption frequency is immediate. The Plan Committee manages the asset allocation based upon our current liquidity and income needs. 2 Debt securities included US securities of 60 percent (2019 – 82 percent) and International securities of 40 percent (2019 – 18 percent). We use letters of credit or surety bonds to secure certain Canadian unfunded defined benefit plan liabilities as at December 31, 2020 . We expect to contribute approximately $125 to all pension and post-retirement plans in 2021 . Total contributions recognized as expense under all defined contribution plans for 2020 was $116 ( 2019 – $88). The significant assumptions used to determine the benefit obligations and expense for our significant plans as at and for the year ended December 31 were as follows: Pension Other 2020 2019 2020 2019 Assumptions used to determine the benefit obligations 1 : Discount rate (%) 2.83 3.35 2.66 3.20 Rate of increase in compensation levels (%) 4.57 4.66 n/a n/a Medical cost trend rate – assumed (%) n/a n/a 4.50 – 5.80 2 4.50 – 6.10 2 Medical cost trend rate – year reaches ultimate trend rate n/a n/a 2037 2037 Mortality assumptions 3 (years) Life expectancy at 65 for a male member currently at age 65 20.6 20.5 20.2 20.3 Life expectancy at 65 for a female member currently at age 65 22.8 22.7 22.8 22.9 Average duration of the defined benefit obligations 4 (years) 15.4 14.6 15.2 15.8 1 The current year’s expense is determined using the assumptions that existed at the end of the previous year. 2 We assumed a graded medical cost trend rate starting at 5.80 percent in 2020, moving to 4.50 percent by 2037 (2019 – starting at 6.10 percent, moving to 4.50 percent by 2037). 3 Based on actuarial advice in accordance with the latest available published tables, adjusted where appropriate to reflect future longevity improvements for each country. 4 Weighted average length of the underlying cash flows. Of the most significant assumptions, a change in discount rates has the greatest potential impact on our pension and other post-retirement benefit plans, with sensitivity to change as follows: 2020 2019 Expense in Expense in Benefit Earnings Before Benefit Earnings Before Change in Assumption Obligations Income Taxes Obligations Income Taxes As reported 2,066 52 2,044 71 Discount rate 1.0 percentage point decrease 360 10 340 10 1.0 percentage point increase (280) (10) (270) (10)

Asset Retirement Obligations an

Asset Retirement Obligations and Accrued Environmental Costs	12 Months Ended
	Dec. 31, 2020
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Asset Retirement Obligations and Accrued Environmental Costs	NOTE 22 ASSET RETIREMENT OBLIGATIONS AND ACCRUED ENVIRONMENTAL COSTS A provision is an estimated liability with uncertainty over the timing or amount that will be paid. The most significant asset retirement and environmental remediation provisions relate to costs to restore potash and phosphate sites to their original, or another specified, condition. The pre-tax risk-free discount rate, expected cash flow payments and sensitivity to changes in the discount rate on the recorded liability for asset retirement obligations and accrued environmental costs at December 31, 2020 , were as follows: Cash Flow Discounted Discount Rate Payments (years) 1 Cash Flows 2,3 +0.5% -0.5% Asset retirement obligations (70) 90 Retail 1 – 30 25 Potash 33 – 441 76 Phosphate 1 – 80 468 Corporate and other 4,5 1 – 482 640 Accrued environmental costs (10) 5 Retail 1 – 30 89 Corporate and other 1 – 20 461 1 Time frame in which payments are expected to principally occur from December 31, 2020. Adjustments to the years can result from changes to the mine life and/or changes in the rate of tailing volumes. 2 Risk-free discount rates reflect current market assessments of the time value of money and the risks specific to the timing and jurisdiction of the obligation. Risk-free rates range from 1.2 percent to 6.5 percent. 3 Total undiscounted cash flows are $2.8 billion. For the Potash segment, this represents total undiscounted cash flows in the first year of decommissioning. This excludes subsequent years of tailings dissolution, fine tails capping, tailings management area reclamation, post-reclamation activities and monitoring, and final decommissioning, which are estimated to take an additional 92 to 407 years. 4 For nitrogen sites, we have not recorded any asset retirement obligations as no significant asset retirement obligations have been identified or there is no reasonable basis for estimating a date or range of dates of cessation of operations. We considered the historical performance of our facilities as well as our planned maintenance, major upgrades and replacements, which can extend the useful lives of our facilities indefinitely. 5 Includes certain potash and phosphate sites that are non-operating sites, with the majority of phosphate site payments taking place over the next 55 years. Following is a reconciliation of asset retirement obligations and accrued environmental costs: Asset Accrued Retirement Environmental Obligations Costs Total Balance – December 31, 2019 1,254 544 1,798 Acquisitions 12 15 27 Disposals - (3) (3) Change in estimates (9) 2 (7) Recorded in earnings 31 3 34 Settled during the year (88) (21) (109) Foreign currency translation and other 9 10 19 Balance – December 31, 2020 1,209 550 1,759 Balance – December 31, 2020 comprised of: Current liabilities Payables and accrued charges (Note 20) 121 41 162 Non-current liabilities Asset retirement obligations and accrued environmental costs 1,088 509 1,597 We are subject to numerous environmental requirements under federal, provincial, state and local laws in the countries in which we operate. We have gypsum stack capping, closure and post-closure obligations through our subsidiaries, PCS Phosphate Company, Inc. in White Springs, Florida, and PCS Nitrogen Inc. in Geismar, Louisiana, pursuant to the financial assurance regulatory requirements in those states. The recorded provisions may not necessarily reflect our obligations under these financial assurances.

Share Capital

Share Capital	12 Months Ended
Share Capital	Dec. 31, 2020
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Share Capital	NOTE 23 SHARE CAPITAL Authorized We are authorized to issue an unlimited number of common shares without par value and an unlimited number of preferred shares. The common shares are not redeemable or convertible. The preferred shares may be issued in one or more series with rights and conditions to be determined by the Board of Directors. Issued Number of Common Shares Share Capital Balance – December 31, 2019 572,942,809 15,771 Issued under option plans and share-settled plans 150,177 7 Repurchased (3,832,580) (105) Balance – December 31, 2020 569,260,406 15,673 Share Repurchase Programs Commencement Date Expiry Maximum Shares for Repurchase 2019 Normal Course Issuer Bid 1 February 27, 2019 February 26, 2020 42,164,420 2020 Normal Course Issuer Bid 2 February 27, 2020 February 26, 2021 28,572,458 1 The 2019 normal course issuer bid permitted the repurchase of up to 7 percent of our outstanding common shares for cancellation. As of the expiry date, we had repurchased 33,256,668 of the maximum shares for repurchase. 2 The 2020 normal course issuer bid permits the repurchase of up to 5 percent of our outstanding common shares for cancellation and can expire earlier than the date above if we acquire the maximum number of common shares allowable or otherwise decide not to make any further repurchases. As at February 18, 2021, we had repurchased 710,100 of the maximum shares for repurchase. On February 17, 2021, our Board of Directors approved a share repurchase program of up to a maximum of 28,468,448 or 5 percent of our outstanding common shares for cancellation. Subject to acceptance by the Toronto Stock Exchange, the 2021 share repurchase program will commence on March 1, 2021, and will expire on the earlier of February 28, 2022, the date on which we have acquired the maximum number of common shares allowable or the date we determine not to make any further repurchases. Purchases under the normal course issuer bids were, or may be, made through open market purchases at market prices as well as by other means permitted by applicable securities regulatory authorities, including private agreements. The following table summarizes our share repurchases: 2020 2019 Number of common shares repurchased for cancellation 3,832,580 36,067,323 Average price per share (US dollars) 41.96 52.07 Total cost 160 1,878 Dividends Declared Dividends declared for the years ended December 31 were as follows: 2020 2019 Declared Per Share Declared Per Share February 19, 2020 0.45 May 10, 2019 0.43 May 6, 2020 0.45 July 30, 2019 0.45 August 10, 2020 0.45 December 13, 2019 0.45 December 10, 2020 0.45 1.80 1.33 Subsequent to year-end, our Board of Directors declared a quarterly dividend of $0.46 per share payable on April 15, 2021, to shareholders of record on March 31, 2021. The total estimated dividend to be paid is $262.

Capital Management

Capital Management	12 Months Ended
Capital Management	Dec. 31, 2020
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Capital Management	NOTE 24 CAPITAL MANAGEMENT The objective of our capital allocation policy is to balance the return of capital to our shareholders, improvements in the efficiency of our existing assets, and delivery on our growth opportunities, while maintaining a strong balance sheet and flexible capital structure to optimize the cost of capital at an acceptable level of risk. Our goal is to pay a stable and growing dividend with a target payout that represents 40 to 60 percent of free cash flow after sustaining capital through the agricultural cycle. We include total debt, adjusted total debt, adjusted net debt and adjusted shareholders’ equity as components of our capital structure. We monitor our capital structure and, based on changes in economic conditions, may adjust the structure by adjusting the amount of dividends paid to shareholders, repurchasing shares, issuing new shares, issuing new debt or retiring existing debt. We use a combination of short-term and long-term debt to finance our operations. We typically pay floating rates of interest on short-term debt and credit facilities, and fixed rates on notes and debentures. We monitor the following ratios: 2020 2019 Adjusted net debt to adjusted EBITDA 2.6 2.5 Debt to capital 1 (Limit: 0.65:1.00) 0.34:1.00 0.33:1:00 Adjusted EBITDA to adjusted finance costs 7.4 8.0 1 Calculated as adjusted total debt to adjusted capital. Adjusted EBITDA is calculated in Note 3 , while the calculation of the remaining components included in the above ratios are set out in the following tables: 2020 2019 Short-term debt 159 976 Current portion of long-term debt 14 502 Current portion of lease liabilities 249 214 Long-term debt 10,047 8,553 Lease liabilities 891 859 Total debt 11,360 11,104 Letters of credit - financial 150 158 Adjusted total debt 11,510 11,262 2020 2019 Total debt 11,360 11,104 Cash and cash equivalents (1,454) (671) Unamortized fair value adjustments (404) (424) Adjusted net debt 9,502 10,009 2020 2019 Total shareholders' equity 22,365 22,869 Accumulated other comprehensive loss 119 251 Adjusted shareholders' equity 22,484 23,120 Adjusted total debt 11,510 11,262 Adjusted capital 33,994 34,382 2020 2019 Finance costs 520 554 Unwinding of discount on asset retirement obligations (33) (54) Borrowing costs capitalized to property, plant and equipment 20 18 Interest on net defined benefit pension and other post-retirement plan obligations (13) (15) Adjusted finance costs 494 503 In 2020, we filed a universal base shelf prospectus in Canada and the US qualifying the issuance of up to $5.0 billion of common shares, debt securities and other securities during a period of 25 months from March 16, 2020. In 2020, we filed a prospectus supplement to issue $1,500 of notes, as discussed in Note 18 .

Business Combinations

Business Combinations	12 Months Ended
Business Combinations	Dec. 31, 2020
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Business Combinations	NOTE 25 BUSINESS COMBINATIONS The Company’s business combinations include the acquisition of Retail businesses, including Ruralco Holdings Limited (“Ruralco”), and various digital agriculture, proprietary products and agricultural services. Ruralco Other Acquisitions Acquisition date September 30, 2019 Various Purchase price, net of cash and cash equivalents acquired $330 On the acquisition date, we acquired 100% of the Ruralco stock that was issued and outstanding. Transaction costs are recorded in acquisition and integration related costs in other expenses. 2020 – $233 (2019 – $581, net of $100 previously held equity-accounted interest in Agrichem ) Goodwill and expected benefits of the acquisition $ 236 $ 133 (2019 – $341 ) The expected benefits of the acquisitions resulting in goodwill include: synergies from expected reduction in operating costs wider distribution channel for selling products of acquired businesses a larger assembled workforce potential increase in customer base enhanced ability to innovate Description An agriservices business in Australia with approximately 250 operating locations. 2020 – 43 Retail locations including Tec Agro Group, a leading agriculture retailer in Brazil (2019 – 68 Retail locations including Actagro, LLC, a developer, manufacturer and marketer of environmentally sustainable soil and plant health products and technologies) We allocated the following values to the acquired assets and assumed liabilities based upon fair values at their respective acquisition date: 2020 2019 Ruralco Final Other Other Preliminary 1 Adjustments Fair Value 2 Acquisitions 3 Acquisitions 3 Receivables 289 27 316 4 68 68 Inventories 117 (5) 112 63 145 Prepaid expenses and other current assets 8 (1) 7 4 38 Property, plant and equipment 136 4 140 73 115 Goodwill 202 34 236 133 341 Other intangible assets 165 43 208 47 179 Other non-current assets 31 (14) 17 2 2 Total assets 948 88 1,036 390 888 Short-term debt 112 55 167 36 25 Payables and accrued charges 345 (21) 324 108 156 Lease liabilities, including current portion 110 - 110 2 1 Other non-current liabilities 51 54 105 11 25 Total liabilities 618 88 706 157 207 Total consideration 330 - 330 233 681 Previously held equity-accounted interest in Agrichem - - - - 100 Total consideration, net of cash and cash equivalents acquired 330 - 330 233 581 1 Preliminary value as previously reported in our 2019 annual consolidated financial statements. 2 We have completed our assessment of identifying and measuring all the assets acquired and liabilities assumed. This assessment included a thorough review of all internal and external sources of information available on circumstances that existed at the acquisition date. We engaged independent valuation experts to assist in determining the fair value of certain assets acquired and liabilities assumed. Adjustments recorded to the preliminary fair value primarily related to changes in the preliminary valuation assumptions, including refinement of our intangible assets and liabilities. All measurement adjustments were offset against goodwill. 3 This represents preliminary fair values. For certain acquisitions, we finalized the purchase price with no material change to the fair values disclosed in prior periods. 4 Includes receivables from customers with gross contractual amounts of $260, of which $7 are considered to be uncollectible. Assets Ruralco Other Acquisitions Valuation Technique and Judgments Applied Property, plant and equipment X X Market approach for land and certain types of personal property: sales comparison that measures the value of an asset through an analysis of sales and offerings of comparable assets. Replacement costs for all other depreciable property, plant and equipment: measures the value of an asset by estimating the costs to acquire or construct comparable assets and adjusts for age and condition of the asset. Other intangible assets X X Income approach – multi-period excess earnings method: measures the value of an asset based on the present value of the incremental after-tax cash flows attributable to the asset after deducting contributory asset charges (“CACs”). Allocation of CACs is a matter of judgment and based on the nature of the acquired businesses’ operations and historical trends. We considered several factors in determining the fair value of customer relationships, such as customers’ relationships with the acquired company and its employees, the segmentation of customers, historical customer attrition rates, and revenue growth. Other provisions and contingent liabilities X X Decision-tree approach of future costs and a risk premium to capture the compensation sought by risk-averse market participants for bearing the uncertainty inherent in the cash flows of the liability. Financial Information Related to the Acquired Operations 2020 Proforma 1 Other Acquisitions Sales 350 EBIT 26 1 Estimated annual sales and earnings before finance costs and income taxes ("EBIT") if acquisitions occurred at the beginning of the year. 2020 Actuals 2019 Actuals From date of acquisition Other Acquisitions Ruralco Other Acquisitions Sales 190 249 312 EBIT 12 (2) (1)

Commitments

Commitments	12 Months Ended
Commitments	Dec. 31, 2020
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Commitments	NOTE 26 COMMITMENTS A commitment is a legally binding and enforceable agreement to purchase goods or services in the future. The amounts below reflect our commitments based on current expected contract prices. At December 31, 2020 , minimum future commitments under our contractual arrangements were as follows: Lease Long-Term Purchase Capital Other Liabilities 1 Debt 1 Commitments Commitments Commitments Total Within 1 year 281 434 1,268 87 132 2,202 1 to 3 years 408 2,378 757 16 118 3,677 3 to 5 years 233 2,498 72 6 53 2,862 Over 5 years 383 10,485 142 1 127 11,138 Total 1,305 15,795 2,239 110 430 19,879 1 Includes principal portion and estimated interest. Purchase Commitments We have a long-term natural gas purchase agreement in Trinidad that expires on December 31, 2023. The contract provides for prices that vary primarily with ammonia market prices and annual escalating floor prices. The commitments included in the foregoing table are based on floor prices and minimum purchase quantities. Profertil has long-term gas contracts denominated in US dollars that expire in 2021, which account for virtually all of Profertil’s gas requirements. YPF S.A., our joint venture partner in Profertil, supplies approximately 70 percent of the gas under these contracts. The Carseland facility has a power co-generation agreement, expiring on December 31, 2026 , which provides 60 megawatt-hours of power per hour. The price for the power is based on a fixed charge adjusted for inflation and a variable charge based on the cost of natural gas provided to the facility for power generation. Agreements for the purchase of sulfur for use in production of phosphoric acid provide for specified purchase quantities and prices based on market rates at the time of delivery. Commitments included in the foregoing table are based on expected contract prices. As part of the agreement to sell the Conda Phosphate operations (“CPO”), we entered into long-term strategic supply and offtake agreements which extend to 2023. Under the terms of the supply and offtake agreements, we will supply 100 percent of the ammonia requirements of CPO and purchase 100 percent of the monoammonium phosphate (“MAP”) product produced at CPO. The MAP production is estimated at 330,000 tonnes per year. Other Commitments Other commitments consist principally of pipeline capacity, technology service contracts, throughput and various rail contracts, the latest of which expires in 2026, and mineral lease commitments, the latest of which expires in 2038.

Guarantees

Guarantees	12 Months Ended
Guarantees	Dec. 31, 2020
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Guarantees	NOTE 27 GUARANTEES In the normal course of business, we provide indemnification agreements to counterparties in transactions such as purchase and sale contracts, service agreements, director/officer contracts, and leasing transactions. The terms of these indemnification agreements may require us to compensate counterparties for costs incurred as a result of various events, including environmental liabilities and changes in (or in the interpretation of) laws and regulations, or as a result of litigation claims or statutory sanctions that may be suffered by a counterparty as a consequence of the transaction; will vary based upon the contract, the nature of which prevents us from making a reasonable estimate of the maximum potential amount that it could be required to pay to counterparties; and have not historically resulted in any significant payments by Nutrien and, as at December 31, 2020 , no amounts have been accrued in the consolidated financial statements (except for accruals relating to certain underlying liabilities). We directly guarantee our share of certain commitments of Canpotex (such as railcar leases) under certain agreements with third parties. We would be required to perform on these guarantees in the event of default by the investee. No material loss is anticipated by reason of such agreements and guarantees.

Related Party Transactions

Related Party Transactions	12 Months Ended
Related Party Transactions	Dec. 31, 2020
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Related Party Transactions	NOTE 28 RELATED PARTY TRANSACTIONS We transact with a number of related parties, the most significant being with our associates and joint ventures, key management personnel, and post-employment benefit plans. Sale of Goods We sell potash outside Canada and the US exclusively through Canpotex. Canpotex sells potash to buyers in export markets pursuant to term and spot contracts at agreed upon prices. Our revenue is recognized at the amount received from Canpotex representing proceeds from their sale of potash, less net costs of Canpotex. Sales to Canpotex are shown in Note 3 . The receivable outstanding from Canpotex is shown in Note 11 and arose from sale transactions described above. It is unsecured and bears no interest. There are no provisions held against this receivable. Key Management Personnel Compensation and Transactions with Post-Employment Benefit Plans Compensation to key management personnel was comprised of: 2020 2019 Salaries and other short-term benefits 16 15 Share-based compensation 26 31 Post-employment benefits 2 3 Termination benefits - 12 44 61 Disclosures related to our post-employment benefit plans, and associates and joint ventures, are shown in Note 21 and Note 15 , respectively .

Contingencies and Other Matters

Contingencies and Other Matters	12 Months Ended
Contingencies and Other Matters	Dec. 31, 2020
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Contingencies and Other Matters	NOTE 29 CONTINGENCIES AND OTHER MATTERS Contingent liabilities, which are not recognized in the consolidated financial statements but may be disclosed, are possible obligations as a result of uncertain future events outside of our control or present obligations not recognized because the amount cannot be sufficiently measured or payment is not probable. Accounting Estimates and Judgments The following judgments are required to determine our exposure to possible losses and gains related to environmental matters and other various claims and lawsuits pending: prediction of the outcome of uncertain events (i.e., being virtually certain, probable, remote or undeterminable); determination of whether recognition or disclosure in the consolidated financial statements is required; and estimation of potential financial effects. Where no amounts are recognized, such amounts are contingent and disclosure may be appropriate. While the amount disclosed in the consolidated financial statements may not be material, the potential for large liabilities exists and, therefore, these estimates could have a material impact on our consolidated financial statements. Supporting Information Canpotex Nutrien is a shareholder in Canpotex, which markets Canadian potash outside of Canada and the US. Should any operating losses or other liabilities be incurred by Canpotex, the shareholders have contractually agreed to reimburse it in proportion to each shareholder’s productive capacity. Through December 31, 2020 , we are not aware of any operating losses or other liabilities. Mining Risk The risk of underground water inflows and other underground risks is insured on a limited basis, subject to insurance market availability. Through December 31, 2020 , we are not aware of any material losses or other liabilities that we have not accrued for. Environmental Remediation, Legal and Other Matters We are engaged in ongoing site assessment and/or remediation activities at a number of facilities and sites. Anticipated costs associated with these matters are added to accrued environmental costs in the manner described in Note 22 . We have established provisions for environmental site assessment and/or remediation matters to the extent that we consider expenses associated with those matters likely to be incurred. Except for the uncertainties described below, we do not believe that our future obligations with respect to these matters are reasonably likely to have a material adverse effect on our consolidated financial statements. Legal matters with significant uncertainties include the following: The United States Environmental Protection Agency (“US EPA”) has an ongoing enforcement initiative directed at the phosphate industry related to the scope of an exemption for mineral processing wastes under the US Resource Conservation and Recovery Act (“RCRA”). This initiative affects the Conda Phosphate plant previously owned by Nu-West Industries, Inc. (“Nu-West”), a wholly owned subsidiary of Agrium, and the Nutrien phosphoric acid facilities in Aurora, North Carolina; Geismar, Louisiana; and White Springs, Florida. All of these facilities received US EPA notices of violation (“NOVs”) that remain outstanding for alleged violations of RCRA and various other environmental laws. Notwithstanding the sale of the Conda Phosphate operations in January 2018, Nu-West remains responsible for environmental liabilities attributable to its historic activities and for resolution of the NOVs. All of the facilities have been and continue to be involved in ongoing discussions with the US EPA, the US Department of Justice and the related state agencies to resolve these matters. Due to the nature of the allegations, we are uncertain as to how the matters will be resolved. Based on settlements with other members of the phosphate industry, we expect that a resolution could involve any or all of the following: 1) penalties, which we currently believe will not be material; 2) modification of certain operating practices; 3) capital improvement projects; 4) providing financial assurance for the future closure, maintenance and monitoring costs for the phosphogypsum stack system; and 5) addressing findings resulting from RCRA section 3013 site investigations. We operate in countries that are parties to the Paris Agreement adopted in December 2015 pursuant to the United Nations Framework Convention on Climate Change. Each country that is a party to the Paris Agreement submitted an Intended Nationally Determined Contribution (“INDC”) toward the control of greenhouse gas emissions. The impacts on our operations of these INDCs and other national and local efforts to limit or tax greenhouse gas emissions cannot be determined with any certainty at this time. In addition, various other claims and lawsuits are pending against the Company in the ordinary course of business. While it is not possible to determine the ultimate outcome of such actions at this time, and inherent uncertainties exist in predicting such outcomes, we believe that the ultimate resolution of such actions is not reasonably likely to have a material adverse effect on our consolidated financial statements. The breadth of our operations and the global complexity of tax regulations require assessments of uncertainties and judgments in estimating the taxes we will ultimately pay. The final taxes paid are dependent upon many factors, including negotiations with taxing authorities in various jurisdictions, outcomes of tax litigation, and resolution of disputes arising from federal, provincial, state and local tax audits. The resolution of these uncertainties and the associated final taxes may result in adjustments to our tax assets and tax liabilities. We own facilities that have been either permanently or indefinitely shut down. We expect to incur nominal annual expenditures for site security and other maintenance costs at some of these facilities. Should the facilities be dismantled, certain other shutdown-related costs may be incurred. Such costs are not expected to have a material adverse effect on our consolidated financial statements and would be recognized and recorded in the period in which they are incurred.

Accounting Policies, Estimates

Accounting Policies, Estimates and Judgments	12 Months Ended
Accounting Policies, Estimates and Judgments	Dec. 31, 2020
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Accounting Policies, Estimates and Judgments	NOTE 30 ACCOUNTING POLICIES, ESTIMATES AND JUDGMENTS The following discusses the significant accounting policies, estimates, judgments and assumptions that we have adopted and applied and how they affect the amounts reported in the consolidated financial statements. Certain of our policies involve accounting estimates and judgments because they require us to make subjective or complex judgments about matters that are inherently uncertain and because of the likelihood that materially different amounts could be reported under different conditions or using different assumptions. Basis of Consolidation These consolidated financial statements include the accounts of the Company and entities we control. Subsidiaries are fully consolidated from the date on which control is transferred to the Company until the date on which control ceases. They are deconsolidated from the date that control ceases. Intercompany balances and transactions are eliminated on consolidation. Principal (wholly owned) Operating Subsidiaries Location Principal Activity Potash Corporation of Saskatchewan Inc. Canada Mining and/or processing of crop nutrients and corporate functions Agrium Inc. Canada Manufacturer and distributor of crop nutrients and corporate functions Agrium Canada Partnership Canada Manufacturer and distributor of crop nutrients Agrium Potash Ltd. Canada Agrium U.S. Inc. US Cominco Fertilizer Partnership US Loveland Products Inc. US Nutrien Ag Solutions (Canada) Inc. Canada Crop input retailer Nutrien Ag Solutions, Inc. US Nutrien Ag Solutions Limited Australia PCS Nitrogen Fertilizer, LP US Production of nitrogen products in the US PCS Nitrogen Trinidad Limited Trinidad Production of nitrogen products in Trinidad PCS Phosphate Company, Inc. US Mining and/or processing of phosphate products Phosphate Holding Company, Inc. US Mining and/or processing of phosphate products and production of nitrogen products in the US Combined Rural Traders Pty Limited Australia Crop input retailer Foreign Currency Transactions Items included in our consolidated financial statements and those of our subsidiaries are measured using the currency of the primary economic environment in which the individual entity operates (the “functional currency”). The consolidated financial statements are presented in US dollars, which was determined to be the functional currency of the Company and the majority of our subsidiaries. In determining the functional currency of our operations, we primarily considered the currency that determines the pricing of transactions rather than focusing on the currency in which transactions are denominated. Foreign exchange gains and losses resulting from the settlement of foreign currency transactions, and from the translation at period-end of monetary assets and liabilities denominated in foreign currencies are recognized and presented in the consolidated statements of earnings within other (income) expenses, as applicable, in the period in which they arise. Non-monetary assets measured at historical cost are translated at the average monthly exchange rate prevailing at the time of the transaction, unless the exchange rate in effect on the date of the transaction is available and it is apparent that such rate is a more suitable measurement. Restructuring Charges Plant shutdowns, sales of business units or other corporate restructurings may trigger restructuring charges. Incremental costs for employee termination, contract termination and other exit costs are recognized as a liability and an expense when a detailed formal plan for restructuring has been demonstrably committed to and a reliable estimate can be made. Revenue We recognize revenue when we transfer control over a good or service to a customer. Transfer of Control for Sale of Goods Transfer of Control for Sale of Services At the point in time when the product is purchased at our Retail farm center delivered and accepted by customers at their premises or loaded for shipping Over time as the promised service is rendered Judgment is used to determine whether we are acting as principal or agent by evaluating who: has the primary responsibility for fulfilling the promised good; bears the inventory risk; and has discretion for establishing the price. For transactions in which we act as an agent rather than the principal, revenue is recognized net of any commissions earned. The related commissions are recognized as the sales occurred or as unconditional contracts are signed. We recognize profits on sales to Canpotex when there is a transfer of control, either at the time the product is loaded for shipping or delivered, depending on the terms of the contract. Our sales revenue relating to our Potash, Nitrogen and Phosphate segments is generally recorded and measured based on the “freight on board” mine, plant, warehouse or terminal price specified in the contract (except for certain vessel sales or specific product sales that are shipped and recorded on a delivered basis), which reflects the consideration we expect to be entitled to in exchange for the goods or services, net of any variable consideration (e.g., any trade discounts or estimated volume rebates). Our customer contracts may provide certain product quality specification guarantees but do not generally provide for refunds or returns. Sales prices are based on North American and International benchmark market prices, which are variable and subject to global supply and demand, and other market factors. For Retail, we do not provide general warranties; however, our customer contracts may provide certain product quality specification guarantees. Returns and incentives are estimated based on historical and forecasted data, contractual terms, and current conditions. Due to the nature of goods and services sold, any single estimate would have only a negligible impact on revenue. Transportation costs are generally recovered from the customer through sales pricing. Where customer contracts include volume rebates, we estimate revenue at the earlier of the most likely amount of consideration we expect to receive or when it is highly probable that a significant reversal will not occur. As the expected period between when control over a promised good or service is transferred and when the customer pays for that good or service is generally less than 12 months, we apply the practical expedient as provided in IFRS 15, “Revenue from Contracts with Customers,” and do not adjust the promised amount of consideration for the effects of financing. Intersegment sales are made under terms that approximate market value. Seasonality in our business results from increased demand for products during planting season. Crop input sales are generally higher in the spring and fall application seasons. Crop nutrient inventories are normally accumulated leading up to each application season. Our cash collections generally occur after the application season is complete, while customer prepayments made to us are typically concentrated in December and January and inventory prepayments paid to our vendors are typically concentrated in the period from November to January. Feed and industrial sales are more evenly distributed throughout the year. Share-based Compensation For awards with performance conditions that determine the number of options or units to which employees are entitled, measurement of compensation cost is based on our best estimate of the outcome of the performance conditions. Changes to vesting assumptions are reflected in earnings immediately for compensation cost already recognized. For plans settled through the issuance of equity For plans settled through cash fair value for stock options is determined on grant date using the Black-Scholes-Merton option-pricing model, and fair value for PSUs is determined on grant date by projecting the outcome of performance conditions. a liability is recorded based on the fair value of the awards each period. Estimation involves determining: stock option-pricing model assumptions as described in the weighted average assumptions table in Note 5 ; forfeiture rate for options granted based on past experience and future expectations, and adjusted upon actual vesting; projected outcome of performance conditions for PSUs, including the relative ranking of our total shareholder return, including expected dividends, compared with a specified peer group using a Monte Carlo simulation option-pricing model and the outcome of our synergies relative to the target; and the number of dividend equivalent units expected to be earned. Income Taxes Taxation on earnings (loss) is comprised of current and deferred income tax and requires significant judgment and estimation. Taxation is recognized in the statements of earnings unless it relates to items recognized either in OCI or directly in shareholders’ equity. Current income tax Deferred income tax is the expected tax payable on the taxable earnings for the year is calculated using rates enacted or substantively enacted at the dates of the consolidated balance sheets in the countries where our subsidiaries and equity-accounted investees operate and generate taxable earnings includes any adjustments made to income tax payable or recoverable in respect of previous years is recognized using the liability method is based on temporary differences between carrying amounts of assets and liabilities and their respective income tax bases is determined using tax rates that have been enacted or substantively enacted by the dates of the consolidated balance sheets and are expected to apply when the related deferred income tax asset is realized or the deferred income tax liability is settled Current and deferred income tax assets and liabilities are offset only if certain criteria are met. The realized and unrealized excess tax benefits from share-based compensation arrangements are recognized in contributed surplus as current and deferred tax, respectively. Uncertain income tax positions are accounted for using the standards applicable to current income tax liabilities and assets (i.e., both liabilities and assets are recorded when probable and measured at the amount expected to be paid to (or recovered from) the taxation authorities using our best estimate of the amount). The final taxes paid, and potential adjustments to tax assets and liabilities, are dependent upon many factors including: negotiations with taxation authorities in various jurisdictions; outcomes of tax litigation; and resolution of disputes arising from federal, provincial, state and local tax audits. Deferred income tax is not accounted for with respect to investments in subsidiaries and equity-accounted investees where we are able to control the reversal of the temporary difference and that difference is not expected to reverse in the foreseeable future; and if arising from initial recognition of an asset or liability in a transaction, other than a business combination, that at the time of the transaction affects neither accounting nor taxable profit or loss. Deferred tax assets are recognized to the extent it is probable future taxable profit will be available to use deductible temporary differences and could be reduced if projected earnings are not achieved or increased if earnings previously not projected become probable. reviewed at each balance sheet date and amended to the extent that it is no longer probable that the related tax benefit will be realized. Financial Instruments Financial assets are measured at amortized cost if the objective of the business model for the instrument or group of instruments is to hold the asset to collect the contractual cash flows and the contractual terms give rise on specified dates to cash flows that are solely payments of principal and interest and is not designated as fair value through profit or loss (“FVTPL”). For equity investments not held for trading, we may make an irrevocable election at initial recognition to recognize changes in fair value through OCI rather than profit or loss. Financial instruments are classified and measured as follows: Fair Value Classification FVTPL FVTOCI Amortized Cost Instrument type Cash and cash equivalents and derivatives Equity investments not held for trading Receivables, short-term debt, payables and accrued charges, long-term debt, lease liabilities, other long-term debt instruments Fair value gains and losses Profit or loss OCI – Interest and dividends Profit or loss Profit or loss Profit or loss: effective interest rate Impairment of assets – – Profit or loss Foreign exchange Profit or loss OCI Profit or loss Transaction costs Profit or loss OCI Included in cost of instrument Financial instruments are recognized at trade date when we commit to purchase or sell the asset. Financial assets are derecognized when the rights to receive cash flow from the investments have expired or we have transferred them and all the risks and rewards of ownership have been substantially transferred. Derivatives are used to lock in commodity prices, interest rates and exchange rates. For designated and qualified cash flow hedges: the effective portion of the change in the fair value of the derivative is accumulated in OCI; when the hedged forecast transaction occurs, the related gain or loss is removed from AOCI and included in the cost of inventory; the hedging gain or loss included in the cost of inventory is recognized in earnings when the product containing the hedged item is sold or becomes impaired; and the ineffective portions of hedges are recorded in net earnings in the current period. We assess whether our derivatives hedging transactions are expected to be or were highly effective, both at the hedge’s inception and on an ongoing basis, in offsetting changes in fair values of hedged items. Hedge effectiveness related to our New York Mercantile Exchange (“NYMEX”) natural gas hedges is assessed on a prospective and retrospective basis using regression analyses. Potential sources of ineffectiveness are changes in timing of forecast transactions, changes in volume delivered, or changes in our credit risk or the counterparty. Measurement of ineffectiveness relating to our foreign exchange and interest rate hedges is based on a comparison of the cumulative changes in fair value of the hedging instrument and the cumulative change in the fair value of a hypothetical derivative with terms based on the hedged forecast cash flows. Potential sources of ineffectiveness are changes in timing or amounts of forecasted cash flows, embedded optionality, and changes in our credit risk or the credit risk of a counterparty. Net investment hedges relating to the commitment to purchase a foreign operation: are considered a non-financial item and are accounted for similar to a cash flow hedge; and the gain or loss from the hedging instrument is deferred in OCI and subsequently recorded as an adjustment to goodwill when the business combination occurs. Financial assets and financial liabilities are offset, and the net amount is presented in the consolidated balance sheets when we: currently have a legally enforceable right to offset the recognized amounts; and intend either to settle on a net basis, or to realize the assets and settle the liabilities simultaneously. Fair Value Measurements Estimated fair values for financial instruments are designed to approximate amounts for which the instruments could be exchanged in a current arm’s-length transaction between knowledgeable, willing parties. The valuation policies and procedures for financial reporting purposes are determined by our finance department. Fair value measurements are categorized into levels based on the degree to which inputs are observable and their significance: Level 1 – Unadjusted quoted prices (in active markets accessible at the measurement date for identical assets or liabilities). Level 2 – Quoted prices (in markets that are not active or based on inputs that are observable for substantially the full term of the asset or liability). Level 3 – Prices or valuation techniques that require inputs that are both unobservable and significant to the overall measurement. Determination of the level hierarchy is based on our assessment of the lowest level input that is significant to the fair value measurement and is subject to estimation and judgment. Fair value estimates: are at a point in time and may change in subsequent reporting periods due to market conditions or other factors; can be determined using multiple methods, which can cause values (or a range of reasonable values) to differ; and may require assumptions about costs/prices over time, discount and inflation rates, defaults, and other relevant variables. Cash and cash equivalents Highly liquid investments with a maturity of three months or less from the date of purchase are considered to be cash equivalents. Receivables Receivables from customers are recognized initially at fair value and subsequently measured at amortized cost less allowance for expected credit losses of receivables from customers. Vendors may offer various incentives to purchase products for resale. Vendor rebates and prepay discounts are accounted for as a reduction of the prices of the suppliers’ products. Rebates based on the amount of materials purchased reduce cost of goods sold as inventory is sold. Rebates earned based on sales volumes of products are offset to cost of goods sold. Rebates that are probable and can be reasonably estimated are accrued. Rebates that are not probable or estimable are accrued when certain milestones are achieved. Estimation of rebates can be complex in nature as vendor arrangements are diverse. The amount of the accrual is determined by analyzing and reviewing historical trends to apply negotiated rates to estimated and actual purchase volumes. Estimated amounts accrued throughout the year could also be impacted if actual purchase volumes differ from projected volumes. Inventories Inventories are valued monthly at the lower of cost and net realizable value. Costs are allocated to inventory using the weighted average cost method. Net realizable value is based on: Products and raw materials Materials and supplies selling price of the finished product (in ordinary course of business) less the estimated costs of completion and estimated costs to make the sale replacement cost A writedown is recognized if the carrying amount exceeds net realizable value and may be reversed if the circumstances that caused it no longer exist. Various factors impact our estimates of net realizable value, including inventory levels, forecasted prices of key production inputs, global nutrient capacities and crop price trends. Property, plant and equipment Owned Right-of-use (leased) Measurement cost, which includes capitalized borrowing costs, less accumulated depreciation and any accumulated impairment losses cost of major inspections and overhauls is capitalized maintenance and repair expenditures that do not improve or extend productive life are expensed in the period incurred cost less accumulated depreciation and any accumulated impairment losses lease payments are allocated between finance costs, and a reduction of the liability and discounted using the interest rate implicit in the lease, if available, or an incremental borrowing rate, being a rate that we would have to pay to borrow the funds required to obtain a similar asset, adjusted for term, security, asset value and the borrower’s economic environment Depreciation method certain property, plant and equipment directly related to our Potash, Nitrogen and Phosphate segments – units-of-production – based on the shorter of estimates of reserves or service lives pre-stripping costs – units-of-production – over the ore mined from the mineable acreage stripped remaining assets – straight-line straight-line – over the shorter of the asset's useful life and the lease term Estimated useful lives, expected patterns of consumption, depreciation method and residual values are reviewed at least annually. Judgment/practical expedients Determining: costs, including income or expenses derived from an asset under construction, that are eligible for capitalization; timing to cease cost capitalization, generally when the asset is capable of operating in the manner intended by management, but also considering the circumstances and the industry in which the asset is to be operated, normally predetermined by management with reference to such factors as productive capacity; the appropriate level of componentization (for individual components for which different depreciation methods or rates are appropriate); repairs and maintenance that qualify as major inspections and overhauls; and useful life over which such costs should be depreciated. Uncertainties are inherent in estimating reserve quantities, particularly as they relate to assumptions regarding future prices, the geology of our mines, the mining methods used, and the related costs incurred to develop and mine reserves. Changes in these assumptions could result in material adjustments to reserve estimates, which could result in impairments or changes to depreciation expense in future periods. We have chosen to: include the use of a single discount rate for a portfolio of leases with reasonably similar characteristics, exclude initial direct costs in measuring ROU assets at the date of initial application, not separate non-lease components and instead to account for lease and non-lease components as a single arrangement, and use exemptions for short-term and low value leases which allow payments to be expensed as incurred. Judgment is required to determine whether a contract or arrangement includes a lease and if it is reasonably certain that an extension option will be exercised. Estimation is used to determine the useful lives of ROU assets, the lease term and the appropriate discount rate applied to the lease payments to calculate the lease liability. We seek to maximize operational flexibility in managing our leasing activities by including extension options when negotiating new leases. Extension options are exercisable at our option and not by the lessors. In determining if a renewal period should be included in the lease term, we consider all relevant factors that create an economic incentive for us to exercise a renewal, including the location of the asset, the availability of suitable alternatives, the significance of the asset to operations, and our business strategy. Lease agreements do not contain significant covenants; however, leased assets may be used as security for lease liabilities and other borrowings. Goodwill and Other intangible assets Goodwill is carried at cost, is not amortized, and represents the excess of the cost of an acquisition over the fair value of the Company’s share of the net identifiable assets of the acquired subsidiary at the date of acquisition. Goodwill is allocated to a CGU or group of CGUs for impairment testing based on the level at which it is monitored by management, and not at a level higher than an operating segment. The allocation is made to the CGU or group of CGUs expected to benefit from the business combination in which the goodwill arose. Other intangible assets are generally measured at cost less accumulated amortization and any accumulated impairment losses. We use judgment to determine which expenditures are eligible for capitalization as intangible assets. Costs incurred internally from researching and developing a product are expensed as incurred until technological feasibility is established, at which time, the costs are capitalized until the product is available for its intended use. Judgment is required in determining when technological feasibility of a product is established. Intangible assets with finite lives are amortized on a straight-line basis over their estimated useful lives. At least annually, the useful lives are reviewed and adjusted if appropriate. Impairment of long-lived assets To assess impairment, assets are grouped at the smallest levels for which there are separately identifiable cash inflows that are largely independent of the cash inflows from other assets or groups of assets (this can be at the asset or CGU level). At the end of each reporting period, we review conditions to determine whether there is any indication that an impairment exists that could potentially impact the carrying amounts of both our long-lived assets to be held and used (including property, plant and equipment, and investments), and our goodwill and other intangible assets. When such indicators exist, impairment testing is performed. Regardless, goodwill is tested at least annually (in the fourth quarter). We review at each reporting period for possible reversal of the impairment for non-financial assets, other than goodwill. Estimates and judgment involves: identifying the appropriate asset, group of assets or CGU; determining the appropriate discount rate for assessing the recoverable amount; and making assumptions about future sales, market conditions, terminal growth rates and cash flow forecasts over the long-term life of the assets or CGUs. We cannot predict if an event that triggers impairment or a reversal of impairment will occur, when it will occur or how it will affect reported asset amounts. Asset impairment amounts previously recorded could be affected if different assumptions were used or if market and other conditions change. Such changes could result in non-cash charges materially affecting our consolidated financial statements. Equity-Accounted Investments Investments in which we exercise significant influence (but do not control) or have joint control (as joint ventures) are accounted for using the equity method. Significant influence is the power to participate in the financial and operating policy decisions of the investee, commonly referred to as an associate. Pension and Other Post-Retirement Benefits For employee retirement and other defined benefit plans: accrued liabilities are recorded net of plan assets; costs, including current and past service costs, gains or losses on curtailments and settlements, and remeasurements are actuarially determined on a regular basis using the projected unit credit method; and past service cost is recognized in net earnings at the earlier of (a) when a plan amendment or curtailment occurs; or (b) when related restructuring costs or termination benefits are recognized. Remeasurements, recognized directly in OCI in the period they occur, are comprised of actuarial gains and losses, return on plan assets (excluding amounts included in net interest) and the effect of the asset ceiling (if applicable). When a plan amendment occurs before a settlement, we recognize past service cost before any gain or loss on settlement. Defined contribution plan costs are recognized in net earnings for services rendered by employees during the period. Estimates and judgments are required to determine discount rates, health care cost trend rates, projected salary increases, retirement age, longevity and termination rates. These assumptions are determined by management and are reviewed annually by our independent actuaries. Our discount rate assumptions are impacted by: the weighted average interest rate at which each pension and other post-retirement plan liability could be effectively settled at the measurement date; country specific rates; and the use of a yield curve approach based on the respective plans’ demographics, expected future pension benefits and medical claims. Payments are measured and discounted to determine the present value of the expected future cash flows. The cash flows are discounted using yields on high-quality AA-rated non-callable bonds with cash flows of similar timing where there is a deep market for such bonds. Where we do not believe there is a deep market for such bonds (such as for terms in excess of 10 years in Canada), the cash flows are discounted using a yield curve derived from yields on provincial bonds rated AA or better to which a spread adjustment is added to reflect the additional risk of corporate bonds. Asset Retirement Obligations and Accrued Environmental Costs Provisions are: measured at the present value of the cash flows expected to be required to settle the obligation; and reviewed at the end of each reporting period for any changes, including the discount rate, foreign exchange rate, and amount or timing of the underlying cash flows, and adjusted against the carrying amount of the provision and any related asset; otherwise, it is recognized in net earnings. As a result of the Merger, we recognized contingent liabilities, which represent additional environmental costs that are present obligations although cash outflows of resources are not probable. These contingent liabilities are subsequently measured at the higher of the amount initially recognized and the amount that would be recognized if the liability becomes probable. Asset retirement obligations and accrued environmental costs include: reclamation and restoration costs at our potash and phosphate mining operations, including management of materials generated by mining and mineral processing, such as various mine tailings and gypsum; land reclamation and revegetation programs; decommissioning of underground and surface operating facilities; general cleanup activities aimed at returning the areas to an environmentally acceptable condition; and post-closure care and maintenance. Estimates for provisions take into account the following: most provisions will not be settled for a number of years; environmental laws and regulations and interpretations by regulatory authorities could change or circumstances affecting our operations could change, either of which could result in significant changes to current plans; and the nature, extent and timing of current and proposed reclamation and closure techniques in view of present environmental laws and regulations. It is reasonably possible that the ultimate costs could change in the future and that changes to these estimates could have a material effect on our consolidated financial statements. We use appropriate technical resources, including outside consultants, to develop specific site closure and post-closure plans in accordance with the requirements of the various jurisdictions in which we operate. Other than certain land reclamation programs, settlement of the obligations is typically correlated with mine life estimates. Business Combinations Consideration is measured at the aggregate of the fair values of assets transferred, liabilities incurred or assumed, and equity instruments issued in exchange for control of the acquiree at the acquisition date. Foreign exchange hedge gains or losses which we designated a cash flow hedge are included in the consideration. Identifiable assets acquired and liabilities assumed are generally measured at fair value. The excess of total consideration for each acquisition plus non-controlling interest in the acquiree, over the fair value of the identifiable net assets acquired, is recorded as goodwill. For each business combination, we elect to measure the non-controlling interest in the acquired entity either at fair value or at the proportionate share of the acquiree’s identifiable net assets. Purchase price allocation involves judgment in identifying assets acquired and liabilities assumed, and estimation of their fair values. To determine fair values, we used quoted market prices or widely accepted valuation techniques. Key assumptions include discount rates and revenue growth rates specific to the acquired assets or liabilities assumed. We performed a thorough review of all internal and external sources of information available on circumstances that existed at the acquisition date. We also engaged independent valuation experts on certain acquisitions to assist in determining the fair value of certain assets acquired and liabilities assumed and related deferred income tax impacts. Transaction costs are recorded in acquisition and integration related costs in other (income) expenses. Standards, Amendments and Interpretations Effective and Applied The IASB and IFRS Interpretations Committee (“IFRIC”) have issued certain standards and amendments or interpretations to existing standards that were effective, and we have applied. We have adopted the following amended standards and interpretations with no material impact on our consolidated financial statements: Conceptual Framework for Financial Reporting Amendments to IAS 1 and IAS 8, Definition of Material Amendments to IFRS 3, “Business Combinations”, Defin

Significant Accounting Policies

Significant Accounting Policies (Policies)	12 Months Ended
Significant Accounting Policies (Policies)	Dec. 31, 2020
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Business Combinations	Business Combinations Consideration is measured at the aggregate of the fair values of assets transferred, liabilities incurred or assumed, and equity instruments issued in exchange for control of the acquiree at the acquisition date. Foreign exchange hedge gains or losses which we designated a cash flow hedge are included in the consideration. Identifiable assets acquired and liabilities assumed are generally measured at fair value. The excess of total consideration for each acquisition plus non-controlling interest in the acquiree, over the fair value of the identifiable net assets acquired, is recorded as goodwill. For each business combination, we elect to measure the non-controlling interest in the acquired entity either at fair value or at the proportionate share of the acquiree’s identifiable net assets. Purchase price allocation involves judgment in identifying assets acquired and liabilities assumed, and estimation of their fair values. To determine fair values, we used quoted market prices or widely accepted valuation techniques. Key assumptions include discount rates and revenue growth rates specific to the acquired assets or liabilities assumed. We performed a thorough review of all internal and external sources of information available on circumstances that existed at the acquisition date. We also engaged independent valuation experts on certain acquisitions to assist in determining the fair value of certain assets acquired and liabilities assumed and related deferred income tax impacts. Transaction costs are recorded in acquisition and integration related costs in other (income) expenses.
Operating Segments	The Executive Leadership Team (“ELT”), comprised of officers at the Executive Vice President level and above, is the Chief Operating Decision Maker (“CODM”). In 2020, the CODM changed the measure used to evaluate the performance of our operating segments from net earnings (loss) before finance costs, income taxes, and depreciation and amortization (“EBITDA”) to adjusted EBITDA. The CODM considers adjusted EBITDA to be a more meaningful measure because it is not impacted by long-term investment and financing decisions, but rather focuses on the performance of our day-to-day operations. In addition, it provides a better indication of the segment’s performance compared to EBITDA as it excludes the impact of impairments and other costs that are centrally managed by our corporate function. Due to the change in the measurement of the segments, we have presented adjusted EBITDA for the comparative period. We determine the composition of the reportable segments based on factors including risks and returns, internal organization, and internal reports reviewed by the CODM. We allocate certain expenses across segments based on reasonable considerations such as production capacities or historical trends.
Revenue	Revenue We recognize revenue when we transfer control over a good or service to a customer. Transfer of Control for Sale of Goods Transfer of Control for Sale of Services At the point in time when the product is purchased at our Retail farm center delivered and accepted by customers at their premises or loaded for shipping Over time as the promised service is rendered Judgment is used to determine whether we are acting as principal or agent by evaluating who: has the primary responsibility for fulfilling the promised good; bears the inventory risk; and has discretion for establishing the price. For transactions in which we act as an agent rather than the principal, revenue is recognized net of any commissions earned. The related commissions are recognized as the sales occurred or as unconditional contracts are signed. We recognize profits on sales to Canpotex when there is a transfer of control, either at the time the product is loaded for shipping or delivered, depending on the terms of the contract. Our sales revenue relating to our Potash, Nitrogen and Phosphate segments is generally recorded and measured based on the “freight on board” mine, plant, warehouse or terminal price specified in the contract (except for certain vessel sales or specific product sales that are shipped and recorded on a delivered basis), which reflects the consideration we expect to be entitled to in exchange for the goods or services, net of any variable consideration (e.g., any trade discounts or estimated volume rebates). Our customer contracts may provide certain product quality specification guarantees but do not generally provide for refunds or returns. Sales prices are based on North American and International benchmark market prices, which are variable and subject to global supply and demand, and other market factors. For Retail, we do not provide general warranties; however, our customer contracts may provide certain product quality specification guarantees. Returns and incentives are estimated based on historical and forecasted data, contractual terms, and current conditions. Due to the nature of goods and services sold, any single estimate would have only a negligible impact on revenue. Transportation costs are generally recovered from the customer through sales pricing. Where customer contracts include volume rebates, we estimate revenue at the earlier of the most likely amount of consideration we expect to receive or when it is highly probable that a significant reversal will not occur. As the expected period between when control over a promised good or service is transferred and when the customer pays for that good or service is generally less than 12 months, we apply the practical expedient as provided in IFRS 15, “Revenue from Contracts with Customers,” and do not adjust the promised amount of consideration for the effects of financing. Intersegment sales are made under terms that approximate market value. Seasonality in our business results from increased demand for products during planting season. Crop input sales are generally higher in the spring and fall application seasons. Crop nutrient inventories are normally accumulated leading up to each application season. Our cash collections generally occur after the application season is complete, while customer prepayments made to us are typically concentrated in December and January and inventory prepayments paid to our vendors are typically concentrated in the period from November to January. Feed and industrial sales are more evenly distributed throughout the year.
Income Taxes	Income Taxes Taxation on earnings (loss) is comprised of current and deferred income tax and requires significant judgment and estimation. Taxation is recognized in the statements of earnings unless it relates to items recognized either in OCI or directly in shareholders’ equity. Current income tax Deferred income tax is the expected tax payable on the taxable earnings for the year is calculated using rates enacted or substantively enacted at the dates of the consolidated balance sheets in the countries where our subsidiaries and equity-accounted investees operate and generate taxable earnings includes any adjustments made to income tax payable or recoverable in respect of previous years is recognized using the liability method is based on temporary differences between carrying amounts of assets and liabilities and their respective income tax bases is determined using tax rates that have been enacted or substantively enacted by the dates of the consolidated balance sheets and are expected to apply when the related deferred income tax asset is realized or the deferred income tax liability is settled Current and deferred income tax assets and liabilities are offset only if certain criteria are met. The realized and unrealized excess tax benefits from share-based compensation arrangements are recognized in contributed surplus as current and deferred tax, respectively. Uncertain income tax positions are accounted for using the standards applicable to current income tax liabilities and assets (i.e., both liabilities and assets are recorded when probable and measured at the amount expected to be paid to (or recovered from) the taxation authorities using our best estimate of the amount). The final taxes paid, and potential adjustments to tax assets and liabilities, are dependent upon many factors including: negotiations with taxation authorities in various jurisdictions; outcomes of tax litigation; and resolution of disputes arising from federal, provincial, state and local tax audits. Deferred income tax is not accounted for with respect to investments in subsidiaries and equity-accounted investees where we are able to control the reversal of the temporary difference and that difference is not expected to reverse in the foreseeable future; and if arising from initial recognition of an asset or liability in a transaction, other than a business combination, that at the time of the transaction affects neither accounting nor taxable profit or loss. Deferred tax assets are recognized to the extent it is probable future taxable profit will be available to use deductible temporary differences and could be reduced if projected earnings are not achieved or increased if earnings previously not projected become probable. reviewed at each balance sheet date and amended to the extent that it is no longer probable that the related tax benefit will be realized.
Financial Instruments and Related Risk Management	Financial Instruments Financial assets are measured at amortized cost if the objective of the business model for the instrument or group of instruments is to hold the asset to collect the contractual cash flows and the contractual terms give rise on specified dates to cash flows that are solely payments of principal and interest and is not designated as fair value through profit or loss (“FVTPL”). For equity investments not held for trading, we may make an irrevocable election at initial recognition to recognize changes in fair value through OCI rather than profit or loss. Financial instruments are classified and measured as follows: Fair Value Classification FVTPL FVTOCI Amortized Cost Instrument type Cash and cash equivalents and derivatives Equity investments not held for trading Receivables, short-term debt, payables and accrued charges, long-term debt, lease liabilities, other long-term debt instruments Fair value gains and losses Profit or loss OCI – Interest and dividends Profit or loss Profit or loss Profit or loss: effective interest rate Impairment of assets – – Profit or loss Foreign exchange Profit or loss OCI Profit or loss Transaction costs Profit or loss OCI Included in cost of instrument Financial instruments are recognized at trade date when we commit to purchase or sell the asset. Financial assets are derecognized when the rights to receive cash flow from the investments have expired or we have transferred them and all the risks and rewards of ownership have been substantially transferred. Derivatives are used to lock in commodity prices, interest rates and exchange rates. For designated and qualified cash flow hedges: the effective portion of the change in the fair value of the derivative is accumulated in OCI; when the hedged forecast transaction occurs, the related gain or loss is removed from AOCI and included in the cost of inventory; the hedging gain or loss included in the cost of inventory is recognized in earnings when the product containing the hedged item is sold or becomes impaired; and the ineffective portions of hedges are recorded in net earnings in the current period. We assess whether our derivatives hedging transactions are expected to be or were highly effective, both at the hedge’s inception and on an ongoing basis, in offsetting changes in fair values of hedged items. Hedge effectiveness related to our New York Mercantile Exchange (“NYMEX”) natural gas hedges is assessed on a prospective and retrospective basis using regression analyses. Potential sources of ineffectiveness are changes in timing of forecast transactions, changes in volume delivered, or changes in our credit risk or the counterparty. Measurement of ineffectiveness relating to our foreign exchange and interest rate hedges is based on a comparison of the cumulative changes in fair value of the hedging instrument and the cumulative change in the fair value of a hypothetical derivative with terms based on the hedged forecast cash flows. Potential sources of ineffectiveness are changes in timing or amounts of forecasted cash flows, embedded optionality, and changes in our credit risk or the credit risk of a counterparty. Net investment hedges relating to the commitment to purchase a foreign operation: are considered a non-financial item and are accounted for similar to a cash flow hedge; and the gain or loss from the hedging instrument is deferred in OCI and subsequently recorded as an adjustment to goodwill when the business combination occurs. Financial assets and financial liabilities are offset, and the net amount is presented in the consolidated balance sheets when we: currently have a legally enforceable right to offset the recognized amounts; and intend either to settle on a net basis, or to realize the assets and settle the liabilities simultaneously.
Receivables	Receivables Receivables from customers are recognized initially at fair value and subsequently measured at amortized cost less allowance for expected credit losses of receivables from customers. Vendors may offer various incentives to purchase products for resale. Vendor rebates and prepay discounts are accounted for as a reduction of the prices of the suppliers’ products. Rebates based on the amount of materials purchased reduce cost of goods sold as inventory is sold. Rebates earned based on sales volumes of products are offset to cost of goods sold. Rebates that are probable and can be reasonably estimated are accrued. Rebates that are not probable or estimable are accrued when certain milestones are achieved. Estimation of rebates can be complex in nature as vendor arrangements are diverse. The amount of the accrual is determined by analyzing and reviewing historical trends to apply negotiated rates to estimated and actual purchase volumes. Estimated amounts accrued throughout the year could also be impacted if actual purchase volumes differ from projected volumes.
Inventories	Inventories Inventories are valued monthly at the lower of cost and net realizable value. Costs are allocated to inventory using the weighted average cost method. Net realizable value is based on: Products and raw materials Materials and supplies selling price of the finished product (in ordinary course of business) less the estimated costs of completion and estimated costs to make the sale replacement cost A writedown is recognized if the carrying amount exceeds net realizable value and may be reversed if the circumstances that caused it no longer exist. Various factors impact our estimates of net realizable value, including inventory levels, forecasted prices of key production inputs, global nutrient capacities and crop price trends.
Property, Plant and Equipment	Property, plant and equipment Owned Right-of-use (leased) Measurement cost, which includes capitalized borrowing costs, less accumulated depreciation and any accumulated impairment losses cost of major inspections and overhauls is capitalized maintenance and repair expenditures that do not improve or extend productive life are expensed in the period incurred cost less accumulated depreciation and any accumulated impairment losses lease payments are allocated between finance costs, and a reduction of the liability and discounted using the interest rate implicit in the lease, if available, or an incremental borrowing rate, being a rate that we would have to pay to borrow the funds required to obtain a similar asset, adjusted for term, security, asset value and the borrower’s economic environment Depreciation method certain property, plant and equipment directly related to our Potash, Nitrogen and Phosphate segments – units-of-production – based on the shorter of estimates of reserves or service lives pre-stripping costs – units-of-production – over the ore mined from the mineable acreage stripped remaining assets – straight-line straight-line – over the shorter of the asset's useful life and the lease term Estimated useful lives, expected patterns of consumption, depreciation method and residual values are reviewed at least annually. Judgment/practical expedients Determining: costs, including income or expenses derived from an asset under construction, that are eligible for capitalization; timing to cease cost capitalization, generally when the asset is capable of operating in the manner intended by management, but also considering the circumstances and the industry in which the asset is to be operated, normally predetermined by management with reference to such factors as productive capacity; the appropriate level of componentization (for individual components for which different depreciation methods or rates are appropriate); repairs and maintenance that qualify as major inspections and overhauls; and useful life over which such costs should be depreciated. Uncertainties are inherent in estimating reserve quantities, particularly as they relate to assumptions regarding future prices, the geology of our mines, the mining methods used, and the related costs incurred to develop and mine reserves. Changes in these assumptions could result in material adjustments to reserve estimates, which could result in impairments or changes to depreciation expense in future periods. We have chosen to: include the use of a single discount rate for a portfolio of leases with reasonably similar characteristics, exclude initial direct costs in measuring ROU assets at the date of initial application, not separate non-lease components and instead to account for lease and non-lease components as a single arrangement, and use exemptions for short-term and low value leases which allow payments to be expensed as incurred. Judgment is required to determine whether a contract or arrangement includes a lease and if it is reasonably certain that an extension option will be exercised. Estimation is used to determine the useful lives of ROU assets, the lease term and the appropriate discount rate applied to the lease payments to calculate the lease liability. We seek to maximize operational flexibility in managing our leasing activities by including extension options when negotiating new leases. Extension options are exercisable at our option and not by the lessors. In determining if a renewal period should be included in the lease term, we consider all relevant factors that create an economic incentive for us to exercise a renewal, including the location of the asset, the availability of suitable alternatives, the significance of the asset to operations, and our business strategy. Lease agreements do not contain significant covenants; however, leased assets may be used as security for lease liabilities and other borrowings.
Goodwill and Other Intangible Assets	Goodwill and Other intangible assets Goodwill is carried at cost, is not amortized, and represents the excess of the cost of an acquisition over the fair value of the Company’s share of the net identifiable assets of the acquired subsidiary at the date of acquisition. Goodwill is allocated to a CGU or group of CGUs for impairment testing based on the level at which it is monitored by management, and not at a level higher than an operating segment. The allocation is made to the CGU or group of CGUs expected to benefit from the business combination in which the goodwill arose. Other intangible assets are generally measured at cost less accumulated amortization and any accumulated impairment losses. We use judgment to determine which expenditures are eligible for capitalization as intangible assets. Costs incurred internally from researching and developing a product are expensed as incurred until technological feasibility is established, at which time, the costs are capitalized until the product is available for its intended use. Judgment is required in determining when technological feasibility of a product is established. Intangible assets with finite lives are amortized on a straight-line basis over their estimated useful lives. At least annually, the useful lives are reviewed and adjusted if appropriate.
Asset Retirement Obligations and Accrued Environmental Costs	Asset Retirement Obligations and Accrued Environmental Costs Provisions are: measured at the present value of the cash flows expected to be required to settle the obligation; and reviewed at the end of each reporting period for any changes, including the discount rate, foreign exchange rate, and amount or timing of the underlying cash flows, and adjusted against the carrying amount of the provision and any related asset; otherwise, it is recognized in net earnings. As a result of the Merger, we recognized contingent liabilities, which represent additional environmental costs that are present obligations although cash outflows of resources are not probable. These contingent liabilities are subsequently measured at the higher of the amount initially recognized and the amount that would be recognized if the liability becomes probable. Asset retirement obligations and accrued environmental costs include: reclamation and restoration costs at our potash and phosphate mining operations, including management of materials generated by mining and mineral processing, such as various mine tailings and gypsum; land reclamation and revegetation programs; decommissioning of underground and surface operating facilities; general cleanup activities aimed at returning the areas to an environmentally acceptable condition; and post-closure care and maintenance. Estimates for provisions take into account the following: most provisions will not be settled for a number of years; environmental laws and regulations and interpretations by regulatory authorities could change or circumstances affecting our operations could change, either of which could result in significant changes to current plans; and the nature, extent and timing of current and proposed reclamation and closure techniques in view of present environmental laws and regulations. It is reasonably possible that the ultimate costs could change in the future and that changes to these estimates could have a material effect on our consolidated financial statements. We use appropriate technical resources, including outside consultants, to develop specific site closure and post-closure plans in accordance with the requirements of the various jurisdictions in which we operate. Other than certain land reclamation programs, settlement of the obligations is typically correlated with mine life estimates.
Investments in Equity-Accounted Investees	Equity-Accounted Investments Investments in which we exercise significant influence (but do not control) or have joint control (as joint ventures) are accounted for using the equity method. Significant influence is the power to participate in the financial and operating policy decisions of the investee, commonly referred to as an associate.
Pension and Other Post-Retirement Benefits	Pension and Other Post-Retirement Benefits For employee retirement and other defined benefit plans: accrued liabilities are recorded net of plan assets; costs, including current and past service costs, gains or losses on curtailments and settlements, and remeasurements are actuarially determined on a regular basis using the projected unit credit method; and past service cost is recognized in net earnings at the earlier of (a) when a plan amendment or curtailment occurs; or (b) when related restructuring costs or termination benefits are recognized. Remeasurements, recognized directly in OCI in the period they occur, are comprised of actuarial gains and losses, return on plan assets (excluding amounts included in net interest) and the effect of the asset ceiling (if applicable). When a plan amendment occurs before a settlement, we recognize past service cost before any gain or loss on settlement. Defined contribution plan costs are recognized in net earnings for services rendered by employees during the period. Estimates and judgments are required to determine discount rates, health care cost trend rates, projected salary increases, retirement age, longevity and termination rates. These assumptions are determined by management and are reviewed annually by our independent actuaries. Our discount rate assumptions are impacted by: the weighted average interest rate at which each pension and other post-retirement plan liability could be effectively settled at the measurement date; country specific rates; and the use of a yield curve approach based on the respective plans’ demographics, expected future pension benefits and medical claims. Payments are measured and discounted to determine the present value of the expected future cash flows. The cash flows are discounted using yields on high-quality AA-rated non-callable bonds with cash flows of similar timing where there is a deep market for such bonds. Where we do not believe there is a deep market for such bonds (such as for terms in excess of 10 years in Canada), the cash flows are discounted using a yield curve derived from yields on provincial bonds rated AA or better to which a spread adjustment is added to reflect the additional risk of corporate bonds.
Share-Based Compensation	Share-based Compensation For awards with performance conditions that determine the number of options or units to which employees are entitled, measurement of compensation cost is based on our best estimate of the outcome of the performance conditions. Changes to vesting assumptions are reflected in earnings immediately for compensation cost already recognized. For plans settled through the issuance of equity For plans settled through cash fair value for stock options is determined on grant date using the Black-Scholes-Merton option-pricing model, and fair value for PSUs is determined on grant date by projecting the outcome of performance conditions. a liability is recorded based on the fair value of the awards each period. Estimation involves determining: stock option-pricing model assumptions as described in the weighted average assumptions table in Note 5 ; forfeiture rate for options granted based on past experience and future expectations, and adjusted upon actual vesting; projected outcome of performance conditions for PSUs, including the relative ranking of our total shareholder return, including expected dividends, compared with a specified peer group using a Monte Carlo simulation option-pricing model and the outcome of our synergies relative to the target; and the number of dividend equivalent units expected to be earned.
Contingencies	Accounting Estimates and Judgments The following judgments are required to determine our exposure to possible losses and gains related to environmental matters and other various claims and lawsuits pending: prediction of the outcome of uncertain events (i.e., being virtually certain, probable, remote or undeterminable); determination of whether recognition or disclosure in the consolidated financial statements is required; and estimation of potential financial effects. Where no amounts are recognized, such amounts are contingent and disclosure may be appropriate. While the amount disclosed in the consolidated financial statements may not be material, the potential for large liabilities exists and, therefore, these estimates could have a material impact on our consolidated financial statements.
Principles of Consolidation	Basis of Consolidation These consolidated financial statements include the accounts of the Company and entities we control. Subsidiaries are fully consolidated from the date on which control is transferred to the Company until the date on which control ceases. They are deconsolidated from the date that control ceases. Intercompany balances and transactions are eliminated on consolidation. Principal (wholly owned) Operating Subsidiaries Location Principal Activity Potash Corporation of Saskatchewan Inc. Canada Mining and/or processing of crop nutrients and corporate functions Agrium Inc. Canada Manufacturer and distributor of crop nutrients and corporate functions Agrium Canada Partnership Canada Manufacturer and distributor of crop nutrients Agrium Potash Ltd. Canada Agrium U.S. Inc. US Cominco Fertilizer Partnership US Loveland Products Inc. US Nutrien Ag Solutions (Canada) Inc. Canada Crop input retailer Nutrien Ag Solutions, Inc. US Nutrien Ag Solutions Limited Australia PCS Nitrogen Fertilizer, LP US Production of nitrogen products in the US PCS Nitrogen Trinidad Limited Trinidad Production of nitrogen products in Trinidad PCS Phosphate Company, Inc. US Mining and/or processing of phosphate products Phosphate Holding Company, Inc. US Mining and/or processing of phosphate products and production of nitrogen products in the US Combined Rural Traders Pty Limited Australia Crop input retailer
Long-Lived Asset Impairment	Impairment of long-lived assets To assess impairment, assets are grouped at the smallest levels for which there are separately identifiable cash inflows that are largely independent of the cash inflows from other assets or groups of assets (this can be at the asset or CGU level). At the end of each reporting period, we review conditions to determine whether there is any indication that an impairment exists that could potentially impact the carrying amounts of both our long-lived assets to be held and used (including property, plant and equipment, and investments), and our goodwill and other intangible assets. When such indicators exist, impairment testing is performed. Regardless, goodwill is tested at least annually (in the fourth quarter). We review at each reporting period for possible reversal of the impairment for non-financial assets, other than goodwill. Estimates and judgment involves: identifying the appropriate asset, group of assets or CGU; determining the appropriate discount rate for assessing the recoverable amount; and making assumptions about future sales, market conditions, terminal growth rates and cash flow forecasts over the long-term life of the assets or CGUs. We cannot predict if an event that triggers impairment or a reversal of impairment will occur, when it will occur or how it will affect reported asset amounts. Asset impairment amounts previously recorded could be affected if different assumptions were used or if market and other conditions change. Such changes could result in non-cash charges materially affecting our consolidated financial statements.
Fair Value Measurements	Fair Value Measurements Estimated fair values for financial instruments are designed to approximate amounts for which the instruments could be exchanged in a current arm’s-length transaction between knowledgeable, willing parties. The valuation policies and procedures for financial reporting purposes are determined by our finance department. Fair value measurements are categorized into levels based on the degree to which inputs are observable and their significance: Level 1 – Unadjusted quoted prices (in active markets accessible at the measurement date for identical assets or liabilities). Level 2 – Quoted prices (in markets that are not active or based on inputs that are observable for substantially the full term of the asset or liability). Level 3 – Prices or valuation techniques that require inputs that are both unobservable and significant to the overall measurement. Determination of the level hierarchy is based on our assessment of the lowest level input that is significant to the fair value measurement and is subject to estimation and judgment. Fair value estimates: are at a point in time and may change in subsequent reporting periods due to market conditions or other factors; can be determined using multiple methods, which can cause values (or a range of reasonable values) to differ; and may require assumptions about costs/prices over time, discount and inflation rates, defaults, and other relevant variables.
Restructuring Charges	Restructuring Charges Plant shutdowns, sales of business units or other corporate restructurings may trigger restructuring charges. Incremental costs for employee termination, contract termination and other exit costs are recognized as a liability and an expense when a detailed formal plan for restructuring has been demonstrably committed to and a reliable estimate can be made.
Foreign Currency Transactions	Foreign Currency Transactions Items included in our consolidated financial statements and those of our subsidiaries are measured using the currency of the primary economic environment in which the individual entity operates (the “functional currency”). The consolidated financial statements are presented in US dollars, which was determined to be the functional currency of the Company and the majority of our subsidiaries. In determining the functional currency of our operations, we primarily considered the currency that determines the pricing of transactions rather than focusing on the currency in which transactions are denominated. Foreign exchange gains and losses resulting from the settlement of foreign currency transactions, and from the translation at period-end of monetary assets and liabilities denominated in foreign currencies are recognized and presented in the consolidated statements of earnings within other (income) expenses, as applicable, in the period in which they arise. Non-monetary assets measured at historical cost are translated at the average monthly exchange rate prevailing at the time of the transaction, unless the exchange rate in effect on the date of the transaction is available and it is apparent that such rate is a more suitable measurement.
Cash and Cash Equivalents	Cash and cash equivalents Highly liquid investments with a maturity of three months or less from the date of purchase are considered to be cash equivalents.

Description of Business (Tables

Description of Business (Tables)	12 Months Ended
Description of Business (Tables)	Dec. 31, 2020
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Summary Of Description of Business	The Company is a corporation organized under the laws of Canada with its registered head office located at Suite 500, 122 – 1st Avenue South, Saskatoon, Saskatchewan, Canada. As at December 31, 2020 , the Company had assets as follows: Segment Description Nutrien Ag Solutions (“Retail”) various retail facilities across the US, Canada, Australia and South America private label and proprietary crop protection products and nutritionals an innovative integrated digital platform for growers and crop consultants Potash six operations in the province of Saskatchewan Nitrogen eight production facilities in North America: four in Alberta and one each in Georgia, Louisiana, Ohio and Texas one large-scale operation in Trinidad six upgrade facilities in North America: three in Alberta and one each in Georgia, Missouri, and Washington 50 percent investment in Profertil S.A. (“Profertil”), a nitrogen producer based in Argentina Phosphate two mines and processing plants: one in Florida and one in North Carolina phosphate feed plants in Illinois, Missouri and Nebraska an industrial phosphoric acid plant in Ohio Corporate and Others investment in Canpotex Limited (“Canpotex”), a Canadian potash export, sales and marketing company owned in equal shares by Nutrien and another potash producer 22 percent investment in Sinofert Holdings Limited (“Sinofert”), a fertilizer supplier and distributor in China

Segment Information (Tables)

Segment Information (Tables)	12 Months Ended
Segment Information (Tables)	Dec. 31, 2020
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Summary of Financial Information on Segments	Financial information on each of these segments is summarized in the following tables: Corporate 2020 Retail Potash Nitrogen Phosphate and Others Eliminations Consolidated Sales – third party 14,748 2,265 2,572 1,241 82 - 20,908 – intersegment 37 248 628 202 - (1,115) - Sales – total 14,785 2,513 3,200 1,443 82 (1,115) 20,908 Freight, transportation and distribution - 367 460 241 - (213) 855 Net sales 14,785 2,146 2,740 1,202 82 (902) 20,053 Cost of goods sold 11,049 1,183 2,265 1,166 74 (923) 14,814 Gross margin 3,736 963 475 36 8 21 5,239 Selling expenses 2,795 9 27 6 (24) - 2,813 General and administrative expenses 135 7 8 10 269 - 429 Provincial mining and other taxes - 201 1 - 2 - 204 Share-based compensation expense - - - - 69 - 69 Impairment of assets (Note 13) - 23 27 769 5 - 824 Other expenses (income) 44 8 (288) 6 228 - (2) Earnings (loss) before finance costs and income taxes 762 715 700 (755) (541) 21 902 Depreciation and amortization 668 452 599 218 52 - 1,989 EBITDA 1,430 1,167 1,299 (537) (489) 21 2,891 Acquisition and integration related costs - - 4 - 56 - 60 Share-based compensation expense - - - - 69 - 69 Impairment of assets (Note 13) - 23 27 769 5 - 824 COVID-19 related expenses - - - - 48 - 48 Foreign exchange loss, net of related derivatives - - - - 19 - 19 Loss on disposal of business - - - - 6 - 6 Net gain on disposal of investment in MOPCO (Note 15) - - (250) - - - (250) Adjusted EBITDA 1,430 1,190 1,080 232 (286) 21 3,667 Assets 20,526 12,032 10,612 1,462 2,983 (423) 47,192 Corporate 2019 Retail Potash Nitrogen Phosphate and Others Eliminations Consolidated Sales – third party 13,244 2,702 2,608 1,397 133 - 20,084 – intersegment 38 207 612 203 - (1,060) - Sales – total 13,282 2,909 3,220 1,600 133 (1,060) 20,084 Freight, transportation and distribution - 305 372 232 - (141) 768 Net sales 13,282 2,604 2,848 1,368 133 (919) 19,316 Cost of goods sold 9,981 1,103 2,148 1,373 133 (924) 13,814 Gross margin 3,301 1,501 700 (5) - 5 5,502 Selling expenses 2,484 9 25 5 (18) - 2,505 General and administrative expenses 112 6 15 7 264 - 404 Provincial mining and other taxes - 287 2 1 2 - 292 Share-based compensation expense - - - - 104 - 104 Impairment of assets (Note 13 and 14) - - - - 120 - 120 Other expenses (income) 69 (4) (46) 25 171 - 215 Earnings (loss) before finance costs and income taxes 636 1,203 704 (43) (643) 5 1,862 Depreciation and amortization 595 390 535 237 42 - 1,799 EBITDA 1,231 1,593 1,239 194 (601) 5 3,661 Merger and related costs - - - - 82 - 82 Acquisition and integration related costs - - - - 16 - 16 Share-based compensation expense - - - - 104 - 104 Impairment of assets (Note 13 and 14) - - - - 120 - 120 Foreign exchange loss, net of related derivatives - - - - 42 - 42 Adjusted EBITDA 1,231 1,593 1,239 194 (237) 5 4,025 Assets 19,990 11,696 10,991 2,198 2,129 (205) 46,799
Summary of Disaggregated Revenue from Contracts with Customers by Product Line or Geographic Location for Each Reportable Segment	Presented below is revenue from contracts with customers disaggregated by product line or geographic location for each reportable segment. 2020 2019 Retail sales by product line Crop nutrients 5,200 4,989 Crop protection products 5,602 4,983 Seed 1,790 1,712 Merchandise 943 598 Nutrien Financial 129 - Services and other 1,241 1,000 Nutrien Financial elimination 1 (120) - 14,785 13,282 Potash sales by geography Manufactured product North America 1,275 1,283 Offshore 2 1,238 1,625 Other potash and purchased products - 1 2,513 2,909 Nitrogen sales by product line Manufactured product Ammonia 779 884 Urea 1,040 1,019 Solutions, nitrates and sulfates 816 812 Other nitrogen and purchased products 565 505 3,200 3,220 Phosphate sales by product line Manufactured product Fertilizer 838 944 Industrial and feed 454 475 Other phosphate and purchased products 151 181 1,443 1,600 1 Represents elimination for the interest and service fees charged by Nutrien Financial to Retail branches. 2 Relates to Canpotex (Note 28).
Summary of Financial Information by Geographical Area	Financial information by geographic area is summarized in the following tables: Sales - Third Party Non-Current Assets 1 2020 2019 2020 2019 United States 12,373 12,561 15,268 15,685 Canada 2,565 2,504 17,435 17,503 Australia 3,231 1,961 1,305 1,172 Canpotex (Note 28) 1,238 1,625 - - Trinidad 101 113 644 691 Other 1,400 2 1,320 2 564 639 20,908 20,084 35,216 35,690 1 Excludes financial instruments (other than equity-accounted investees), deferred tax assets and post-employment benefit assets. 2 Other third-party sales primarily relate to Argentina of $372 (2019 – $404), Brazil of $284 (2019 – $109), Europe of $183 (2019 – $210), and Others of $561 (2019 – $597). Canpotex sales volumes by geographical area were as follows: Canpotex Sales by market (%) 2020 2019 Latin America 32 31 China 22 22 India 14 10 Other Asian markets 25 27 Other markets 7 10

Nature of Expenses (Tables)

Nature of Expenses (Tables)	12 Months Ended
Nature of Expenses (Tables)	Dec. 31, 2020
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Summary of Detailed Information about Expenses by Nature	2020 2019 Purchased and produced raw materials and product for resale 1 12,110 11,335 Depreciation and amortization 1,989 1,799 Employee costs 2 2,450 2,205 Freight 963 845 Impairment of assets (Note 13 and 14) 824 120 Provincial mining and other taxes 3 204 292 Offsite warehouse costs 60 51 Merger and related costs - 82 Acquisition and integration related costs 60 16 Contract services 617 567 Lease expense 4 60 66 Fleet fuel, repairs and maintenance 222 202 COVID-19 related expenses 48 - Net gain on disposal of investment in MOPCO (Note 15) (250) - Other 649 642 Total cost of goods sold and expenses 20,006 18,222 1 Significant expenses include: supplies, energy, fuel, purchases of raw material (natural gas – feedstock, sulfur, ammonia and reagents) and product for resale (crop nutrients and protection products, and seed). 2 Includes employee benefits and share-based compensation. 3 Includes Saskatchewan potash production tax, and Saskatchewan resource surcharge and other of $86 and $118 (2019 – $190 and $102), respectively, as required under Saskatchewan provincial legislation. 4 Includes lease expense relating to short-term leases, leases of low value and variable lease payments.

Share-Based Compensation (Table

Share-Based Compensation (Tables)	12 Months Ended
Share-Based Compensation (Tables)	Dec. 31, 2020
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Summary of Stock Awards Available for Grant	The following summarizes the Nutrien share-based compensation plans, under which we have awards available to be granted, and the assumed legacy plans of PotashCorp and Agrium, under which no awards will be granted: Plans Eligibility Granted Vesting Period Maximum Term Settlement Stock Options Officers and eligible employees Annually 25% per year over four years 10 years Shares PSUs Officers and eligible employees Annually On third anniversary of grant date based on total shareholder return over a three-year performance cycle, compared to average total shareholder return of a peer group of companies over the same period Not applicable Cash RSUs Eligible employees Annually On third anniversary of grant date and are not subject to performance conditions Not applicable Cash DSUs Non-executive directors At the discretion of the Board of Directors Fully vest upon grant Not applicable Cash 1 SARs/TSARs 2 Awards no longer granted; legacy awards only Awards no longer granted; legacy awards only 25% per year over four years 10 years Cash 1 Directors can redeem their DSUs for cash only when they leave the Board of Directors for an amount equal to the market value of the common shares at the time of redemption or as mandated by the Nutrien DSU Plan. 2 Under the assumed legacy Agrium stock appreciation rights (“SARs”) plan, holders of tandem stock appreciation rights (“TSARs”) have the ability to choose between (a) receiving in cash the price of our shares on the date of exercise in excess of the exercise price of the right or (b) receiving common shares by paying the exercise price of the right. Our past experience and future expectation is that substantially all TSAR holders will elect to choose the first option.
Summary of Weighted Average Assumptions in Stock Options	The weighted average fair value of stock options granted was estimated as of the date of the grant using the Black-Scholes-Merton option-pricing model. The weighted average grant date fair value of stock options per unit granted in 2020 was $ 7.18 ( 2019 – $ 11.27 ). The weighted average assumptions by year of grant that impacted current year results are as follows: Year of Grant Assumptions Based On 2020 2019 Exercise price per option Quoted market closing price 1 42.23 53.54 Expected annual dividend yield (%) Annualized dividend rate 2 4.36 3.22 Expected volatility (%) Historical volatility 3 29 27 Risk-free interest rate (%) Zero-coupon government issues 4 1.51 2.55 Average expected life of options (years) Historical experience 8.5 7.5 1 Of common shares on the last trading day immediately preceding the date of the grant. 2 As of the date of the grant. 3 Of the Company’s share over a period commensurate with the expected life of the option. 4 Implied yield available on equivalent remaining term at the time of the grant.
Summary of Stock Option Plans	The following table summarizes the activity related to our stock option plans: Number of Shares Subject to Option Weighted Average Exercise Price 2020 2019 2020 2019 Outstanding – beginning of year 9,191,480 9,044,237 56.88 58.41 Granted 2,293,802 1,376,533 42.23 53.54 Exercised (123,403) (451,574) 42.24 42.73 Forfeited or cancelled (34,506) (502,016) 57.45 86.53 Expired (329,481) (275,700) 75.92 76.59 Outstanding – end of year 10,997,892 9,191,480 53.59 56.88
Summary of Stock Options Outstanding Range of Exercise Price	The following table summarizes information about our stock options outstanding as at December 31, 2020 , with expiry dates ranging from May 2021 to February 2030 : Options Outstanding Options Exercisable Weighted Weighted Weighted Average Average Average Remaining Exercise Exercise Range of Exercise Prices Number Life in Years Price Number Price $37.84 to $41.60 1,647,297 5 38.71 1,647,297 38.71 $41.61 to $43.36 2,293,802 9 42.23 - 1 - $43.37 to $45.40 1,492,667 7 44.50 988,275 44.50 $45.41 to $52.75 2,239,358 5 48.74 2,098,294 48.91 $52.76 to $78.86 1,645,867 7 57.60 821,067 61.68 $78.87 to $130.78 1,678,901 2 94.31 1,678,901 94.31 10,997,892 6 53.59 7,233,834 57.97 1 Options granted in this range of exercise prices have not yet met the vesting period.
Compensation Expense for all Employee and Director Share-based Compensation Plans	Information for all employee and director share-based compensation plans is summarized below: Units Granted Units Outstanding Compensation Expense in 2020 as at December 31, 2020 2020 2019 Stock Options 2,293,802 10,997,892 14 19 PSUs 794,017 1,879,160 31 65 RSUs 486,194 1,304,858 22 18 DSUs 49,424 369,267 2 2 SARs/TSARs - 1,576,172 - - 69 104

Other Expenses (Tables)

Other Expenses (Tables)	12 Months Ended
Other Expenses (Tables)	Dec. 31, 2020
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Summary of Detailed Information About Other Income and Expenses	2020 2019 Merger and related costs - 82 Acquisition and integration related costs 60 16 Foreign exchange loss, net of related derivatives 18 42 Earnings of equity-accounted investees (73) (66) Bad debt expense 6 24 COVID-19 related expenses 48 - Loss on disposal of business 6 - Net gain on disposal of investment in MOPCO (Note 15) (250) - Other expenses 183 117 (2) 215

Finance Costs (Tables)

Finance Costs (Tables)	12 Months Ended
Finance Costs (Tables)	Dec. 31, 2020
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Summary of Finance Costs	2020 2019 Interest expense Short-term debt 50 87 Long-term debt 392 387 Lease liabilities (Note 19) 34 34 COVID-19 related 19 - Unwinding of discount on asset retirement obligations (Note 22) 33 54 Interest on net defined benefit pension and other post-retirement plan obligations (Note 21) 13 15 Borrowing costs capitalized to property, plant and equipment (20) (18) Interest income (1) (5) 520 554

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
Income Taxes (Tables)	Dec. 31, 2020
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Summary of Provision for Income Taxes	We operate in a specialized industry and in several tax jurisdictions; as a result, our earnings are subject to various rates of taxation. The provision for income taxes differs from the amount that would have resulted from applying the Canadian statutory income tax rates to earnings (loss) before income taxes as follows: 2020 2019 Earnings (loss) before income taxes Canada 525 765 United States (506) 315 Australia 83 27 Trinidad (44) (28) Other 324 229 382 1,308 Canadian federal and provincial statutory income tax rate (%) 27 27 Income tax at statutory rates 103 353 Adjusted for the effect of: Recovery of prior year taxes due to US legislative changes (94) - Non-taxable income (59) (19) Change in recognition of tax losses and deductible temporary differences (20) - Impact of foreign tax rates (18) (45) Production-related deductions (12) (17) Impact of tax rate changes (3) 16 Non-deductible expenses 13 15 Foreign accrual property income 7 18 Other 6 (5) Income tax (recovery) expense included in net earnings (77) 316
Summary of Total Income Tax Expense	Total income tax (recovery) expense, included in net earnings, was comprised of the following: 2020 2019 Current income tax Tax (recovery) expense for current year (38) 161 Adjustments in respect of prior years (30) (22) Total current income tax (recovery) expense (68) 139 Deferred income tax Origination and reversal of temporary differences 72 152 Adjustments in respect of prior years (58) 9 Change in recognition of tax losses and deductible temporary differences (20) - Impact of tax rate changes (3) 16 Total deferred income tax (recovery) expense (9) 177 Income tax (recovery) expense included in net earnings (77) 316
Summary of Deferred Income Tax Assets (Liabilities)	Deferred Income Taxes In respect of each type of temporary difference, unused tax loss and unused tax credit, the amounts of deferred tax assets and liabilities recognized in the consolidated balance sheets as at December 31 and the amount of the deferred tax (recovery) expense recognized in net earnings were: Deferred Income Tax (Recovery) Deferred Income Tax (Assets) Expense Recognized Liabilities in Net Earnings 2020 2019 2020 2019 Deferred income tax assets Asset retirement obligations and accrued environmental costs (376) (387) 20 25 Tax loss and other carryforwards (370) (270) (98) (9) Lease liabilities (201) (227) 26 55 Pension and other post-retirement benefit liabilities (161) (168) (12) (14) Long-term debt (102) (107) 3 3 Receivables (50) (51) 2 7 Inventories (37) (59) 20 (5) Payables and accrued charges - (25) 25 (5) Other assets (12) (22) 17 14 Deferred income tax liabilities Property, plant and equipment 3,637 3,647 (12) 147 Goodwill and other intangible assets 471 523 (67) (58) Payables and accrued charges 72 - 72 - Other liabilities 36 42 (5) 17 2,907 2,896 (9) 177
Summary of Reconciliation of Net Deferred Income Tax Liabilities	Reconciliation of net deferred income tax liabilities: 2020 2019 Balance – beginning of year 2,896 2,691 Business acquisitions (Note 25) - 29 Income tax (recovery) expense recognized in net earnings (9) 177 Income tax charge recognized in other comprehensive income ("OCI") 17 2 Other 3 (3) Balance – end of year 2,907 2,896
Summary of Amounts and Expiry Dates of Unused Tax Losses and Unused Tax Credits	Amounts and expiry dates of unused tax losses and unused tax credits as at December 31, 2020 , were: Amount Expiry Date Unused federal operating losses 1,425 2021 – Indefinite Unused federal capital losses 583 Indefinite Unused investment tax credits 23 2021 – 2040

Net Earnings per Share (Tables)

Net Earnings per Share (Tables)	12 Months Ended
Net Earnings per Share (Tables)	Dec. 31, 2020
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Weighted Average Number of Shares Reconciliation from Common to Diluted common	2020 2019 Weighted average number of common shares 569,657,000 582,269,000 Dilutive effect of stock options 29,000 777,000 Dilutive effect of share-settled PSUs - 56,000 Weighted average number of diluted common shares 569,686,000 583,102,000
Summary of Options Excluded from Calculation of Diluted Net Earnings per Share	Options excluded from the calculation of diluted net earnings per share due to the option exercise prices being greater than the average market price of common shares were as follows: 2020 2019 Number of options excluded 9,875,797 4,539,529 Performance option plan years fully excluded 2011 – 2017 2010 – 2015 Stock option plan years fully excluded 2015, 2017 – 2020 2015, 2019

Financial Instruments and Rel_2

Financial Instruments and Related Risk Management (Tables)	12 Months Ended
Financial Instruments and Related Risk Management (Tables)	Dec. 31, 2020
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Summary of Credit Risk Management Through Policies	Credit Risk Risk Management Strategies Receivables from customers establish credit approval policies and procedures for new and existing customers extend credit to qualified customers through: review of credit agency reports, financial statements and/or credit references, as available review of existing customer accounts every 12 – 24 months based on the credit limit amounts evaluation of customer and country risk for international customers establish credit period: 15 and 30 days for wholesale fertilizer customers 30 days for industrial and feed customers 30 – 360 days for Retail, including Nutrien Financial, customers up to 180 days for select export sales customers, including Canpotex transact on a cash basis with certain customers who may not meet specified benchmark creditworthiness or cannot provide other evidence of ability to pay execute an agency arrangement with a financial institution with which we have only a limited recourse involvement sell receivables to financial institutions which substantially transfer the risks and rewards set eligibility requirements for Nutrien Financial to limit the risk of the receivables may require security over certain crop or livestock inventories set up provision using the lifetime expected credit loss method considering all possible default events over the expected life of a financial instrument. Receivables are grouped based on days past due and/or customer credit risk profile. Estimated losses on receivables are based on known troubled accounts and historical experience of losses incurred. Receivables are considered to be in default and are written off against the allowance when it is probable that all remaining contractual payments due will not be collected in accordance with the terms of the agreement Cash and cash equivalents and derivative assets require acceptable minimum counterparty credit ratings limit counterparty or credit exposure select counterparties with investment-grade quality
Summary of Maximum Exposure to Credit Risk	Maximum exposure to credit risk as at December 31: 2020 2019 Cash and cash equivalents 1,454 671 Receivables 1 3,498 3,438 Other current assets – derivatives 45 5 4,997 4,114 1 Excluding income tax receivable.
Summary of Maturity Analysis of Financial Liabilities and Gross Settled Derivative Contracts	The following maturity analysis of our financial liabilities and gross settled derivative contracts (for which the cash flows are settled simultaneously) is based on the expected undiscounted contractual cash flows from the date of the consolidated balance sheets to the contractual maturity date. Carrying Amount Contractual of Liability as at Cash Within 1 to 3 3 to 5 Over 5 2020 December 31 Flows 1 Year Years Years Years Short-term debt 1 159 159 159 - - - Payables and accrued charges 2 5,781 5,781 5,781 - - - Long-term debt, including current portion 1 10,061 15,795 434 2,378 2,498 10,485 Lease liabilities, including current portion 1 1,140 1,305 281 408 233 383 Derivatives 48 48 39 9 - - 17,189 23,088 6,694 2,795 2,731 10,868 1 Contractual cash flows include contractual interest payments related to debt obligations and lease liabilities. Interest rates on variable rate debt are based on prevailing rates as at December 31, 2020. 2 Excludes non-financial liabilities and includes trade payables of approximately $1.5 billion that are related to our prepaid inventory to secure product discounts. We consider these amounts to be part of our working capital. For these payables, we participated in arrangements where the vendors sold their right to receive payment to financial institutions without extending the original payment terms. These payables were paid in January and February 2021.
Summary of Material Foreign Currency Derivatives	The fair value of our net foreign exchange currency derivative assets (liabilities) at December 31, 2020 was $14 (2019 – $2). The following table presents the significant foreign currency derivatives that existed at December 31: 2020 2019 Average Average contract contract Sell/buy Notional Maturities rate Notional Maturities rate Derivatives not designated as hedges Forwards USD/CAD 1 514 2021 1.2796 337 2020 1.3096 CAD/USD 126 2021 1.2804 120 2020 1.3138 USD/AUD 2 28 2021 1.3661 78 2020 1.4593 AUD/USD 92 2021 1.3640 47 2020 1.4563 Options USD/CAD - buy USD puts 70 2021 1.3147 - - - USD/CAD - sell USD calls 55 2021 1.3665 - - - AUD/USD - buy USD calls 61 2021 1.3216 - - - Derivatives designated as hedges Forwards USD/CAD 254 2021 1.3190 - - - 1 Canadian dollar 2 Australian dollar
Summary of Natural Gas Derivatives Outstanding	Natural gas derivatives outstanding: 2020 2019 Average Fair Value Average Fair Value Contract of Assets Contract of Assets Notional 1 Maturities Price 2 (Liabilities) Notional 1 Maturities Price 2 (Liabilities) NYMEX swaps 14 2021 – 2022 3.89 (18) 16 2020 – 2022 4.26 (30) 1 In millions of Metric Million British Thermal Units (“MMBtu”). 2 US dollars per MMBtu.
Summary of Recognized Financial Instruments that are Offset, or Subject to Enforceable Master Netting Arrangements	2020 2019 Net Amounts Net Amounts Financial assets (liabilities) Gross Offset Presented Gross Offset Presented Derivative instrument liabilities Natural gas derivatives 1 (18) - (18) (30) - (30) Other long-term debt instruments 2 (150) 150 - (150) 150 - (168) 150 (18) (180) 150 (30) 1 Cash margin deposits of $9 (2019 – $17) were placed with counterparties related to legally enforceable master netting arrangements. 2 Back-to-back loan arrangements that are not subject to any financial test covenants but are subject to certain customary covenants and events of default. We were in compliance with these covenants as at December 31, 2020.
Summary of Fair Value Hierarchy for Financial Assets and Financial Liabilities	The following table presents our fair value hierarchy for financial instruments carried at fair value on a recurring basis or measured at amortized cost: 2020 2019 Carrying Carrying Financial assets (liabilities) measured at Amount Level 1 1 Level 2 1 Amount Level 1 1 Level 2 1 Fair value on a recurring basis Cash and cash equivalents 1,454 - 1,454 671 - 671 Derivative instrument assets 45 - 45 5 - 5 Other current financial assets – marketable securities 2 161 24 137 193 27 166 Investment at fair value through other comprehensive income ("FVTOCI") (Note 15) 153 153 - 161 161 - Derivative instrument liabilities (48) - (48) (33) - (33) Amortized cost Current portion of long-term debt Notes and debentures - - - (494) - (503) Fixed and floating rate debt (14) - (14) (8) - (8) Long-term debt Notes and debentures (9,994) (3,801) (7,955) (8,528) (1,726) (7,440) Fixed and floating rate debt (53) - (53) (25) - (25) 1 During 2020 and 2019, there were no transfers between Level 1 and Level 2 for financial instruments measured at fair value on a recurring basis. Our policy is to recognize transfers at the end of the reporting period. 2 Marketable securities consist of equity and fixed income securities.

Receivables (Tables)

Receivables (Tables)	12 Months Ended
Receivables (Tables)	Dec. 31, 2020
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Summary of Receivables	Segment 2020 2019 Receivables from customers Third parties Retail (Nutrien Financial) 1 1,417 826 Retail 1,158 1,682 Potash, Nitrogen, Phosphate 391 428 Related party - Canpotex Potash (Note 28) 122 194 Less allowance for expected credit losses of receivables from customers (69) (83) 3,019 3,047 Rebates 256 190 Income taxes (Note 8) 83 104 Other receivables 223 201 3,581 3,542 1 Includes $1,147 of very low risk of default and $270 of low risk of default (2019 - $762 of very low risk of default and $64 of low risk of default).

Inventories (Tables)

Inventories (Tables)	12 Months Ended
Inventories (Tables)	Dec. 31, 2020
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Summary of Inventories	2020 2019 Product purchased for resale 1 3,655 3,592 Finished products 384 524 Intermediate products 227 244 Raw materials 215 205 Materials and supplies 449 410 4,930 4,975 1 Includes biological assets of $7 (December 31, 2019 – $33) measured at fair value less costs of disposal ("FVLCD").

Property, Plant and Equipment (

Property, Plant and Equipment (Tables)	12 Months Ended
Property, Plant and Equipment (Tables)	Dec. 31, 2020
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Summary of Reconciliation of Changes in Property Plant and Equipment	Machinery Mine Land and Buildings and and Development Assets Under Improvements Improvements Equipment Costs Construction Total Useful life range (years) 2 – 80 1 – 60 1 – 80 2 – 60 n/a Carrying amount – December 31, 2019 1,160 6,409 10,641 747 1,378 20,335 Acquisitions (Note 25) 8 27 42 - - 77 Additions 25 91 224 1 1,077 1,418 Additions – ROU assets - 24 299 - - 323 Disposals (5) (9) (34) - - (48) Transfers 46 58 923 164 (1,191) - Foreign currency translation and other (15) - 30 30 (10) 35 Depreciation (39) (198) (1,060) (82) - (1,379) Depreciation – ROU assets (2) (55) (222) - - (279) Impairment (88) (42) (507) (137) (48) (822) Carrying amount – December 31, 2020 1,090 6,305 10,336 723 1,206 19,660 Balance – December 31, 2020 comprised of: Cost 1,530 8,377 19,730 2,279 1,206 33,122 Accumulated depreciation and impairments (440) (2,072) (9,394) (1,556) - (13,462) Carrying amount – December 31, 2020 1,090 6,305 10,336 723 1,206 19,660 Balance – December 31, 2020 comprised of: Owned property, plant and equipment 1,061 5,986 9,665 723 1,206 18,641 ROU assets 29 319 671 - - 1,019 Carrying amount – December 31, 2020 1,090 6,305 10,336 723 1,206 19,660 Carrying amount – December 31, 2018 1,018 6,044 9,882 709 1,143 18,796 ROU assets recognized on adoption of IFRS 16, "Leases" ("IFRS 16") 48 307 704 - - 1,059 Acquisitions (Note 25) 17 136 61 - 37 251 Additions 14 30 225 - 1,487 1,756 Additions – ROU assets - 22 177 - - 199 Disposals (3) (5) (84) - - (92) Transfers 108 145 932 110 (1,295) - Foreign currency translation and other (4) (37) (14) 5 6 (44) Depreciation (36) (187) (1,004) (77) (1,304) Depreciation – ROU assets (2) (46) (186) - - (234) Impairment - - (52) - - (52) Carrying amount – December 31, 2019 1,160 6,409 10,641 747 1,378 20,335 Balance – December 31, 2019 comprised of: Cost 1,474 8,207 18,548 2,068 1,378 31,675 Accumulated depreciation and impairments (314) (1,798) (7,907) (1,321) - (11,340) Carrying amount – December 31, 2019 1,160 6,409 10,641 747 1,378 20,335 Balance – December 31, 2019 comprised of: Owned property, plant and equipment 1,117 6,065 9,973 747 1,378 19,280 ROU assets 43 344 668 - - 1,055 Carrying amount – December 31, 2019 1,160 6,409 10,641 747 1,378 20,335 n/a = not applicable
Summary of Depreciation of Property Plant and Equipment	Depreciation of property, plant and equipment was included in the following: 2020 2019 Freight, transportation and distribution 138 137 Cost of goods sold 1,111 1,008 Selling expenses 393 344 General and administrative expenses 56 40 1,698 1,529 Depreciation recorded in inventory 132 161 1,830 1,690
Impairment of Assets	In 2020, we recorded the following impairments: Cash-generating units ("CGUs") Aurora White Springs Segment Phosphate Impairment indicator Lower long-term forecasted global phosphate prices Pre-tax impairment loss ($) 545 215 Recoverable amount ($) 995 (post-tax) 160 (pre-tax) Valuation technique FVLCD a Level 3 measurement Value in use ("VIU") Key assumptions End of mine life (proven and probable reserves) (year) 2050 2029 Post-tax discount rate (%) 10.5 12.0 (pre-tax - 16.0)
Disclosure Sensitivity Analysis Recoverable Value Long Lived Assets Explanatory	The following table highlights sensitivities to the recoverable amount which could result in additional impairment losses or reversals of previously recorded losses: Aurora Key Assumptions Change in Assumption Increase (Decrease) to Recoverable Amount ($) Net selling price ± 10 per tonne ± 150 Discount rate ± 1.0 percentage point ± 120
Key Assumptions Sensitivity Analysis For Recoverable Value Equal To Carrying Value	The following table indicates the percentages by which key assumptions would need to change individually for the estimated Trinidad CGU recoverable amount to be equal to the carrying amount: Key Assumptions Change Required for Carrying Amount to Equal Recoverable Amount Net selling price (5-year average) 4 percent decrease Production volumes (5-year average) 5 percent decrease Discount rate (post-tax) 0.9 percentage point increase

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets (Tables)	12 Months Ended
Goodwill and Other Intangible Assets (Tables)	Dec. 31, 2020
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Summary of Reconciliation of Intangible Assets	Other Intangibles Customer Trade Goodwill Relationships 2 Technology Names Other Total Useful life range (years) n/a 3 – 15 3 – 30 1 – 20 ³ 1 – 20 Carrying amount – December 31, 2019 11,986 1,584 351 62 431 2,428 Acquisitions (Note 25) 167 74 2 8 6 90 Additions – internally developed - - 106 - 16 122 Foreign currency translation and other 45 22 20 14 (22) 34 Disposals - - (3) - - (3) Amortization 1 - (165) (39) (9) (70) (283) Carrying amount – December 31, 2020 12,198 1,515 437 75 361 2,388 Balance – December 31, 2020 comprised of: Cost 12,205 1,971 544 111 597 3,223 Accumulated amortization and impairment (7) (456) (107) (36) (236) (835) Carrying amount – December 31, 2020 12,198 1,515 437 75 361 2,388 Carrying amount – December 31, 2018 11,431 1,554 117 90 449 2,210 Acquisitions (Note 25) 543 173 43 13 115 344 Additions – internally developed - - 197 - 2 199 Foreign currency translation and other 12 2 9 18 (25) 4 Impairment - - - (35) (33) (68) Amortization 1 - (145) (15) (24) (77) (261) Carrying amount – December 31, 2019 11,986 1,584 351 62 431 2,428 Balance – December 31, 2019 comprised of: Cost 11,993 1,906 429 92 597 3,024 Accumulated amortization and impairment (7) (322) (78) (30) (166) (596) Carrying amount – December 31, 2019 11,986 1,584 351 62 431 2,428 1 Amortization of $254 was included in selling expenses during the year ended December 31, 2020 (2019 – $234). 2 The average remaining amortization period of customer relationships at December 31, 2020, was approximately 6 years. 3 Certain trade names have indefinite useful lives as there are no regulatory, legal, contractual, cooperative, economic or other factors that limit their useful lives.
Summary of Terminal Growth Rate and Curresponding Breakeven Discount Rate	For each CGU or group of CGUs, terminal growth rates and discount rates used were as follows: Terminal Growth Rate (%) Discount Rate (%) 2020 2019 2020 2019 Retail – North America 2.5 2.5 7.5 7.0 Retail – International 1 2.0 2.0 7.8 - 16.0 7.5 - 15.0 Potash 2.5 2.5 8.0 8.0 Nitrogen 2.0 2.0 8.0 9.0 1 The discount rates reflect the country risk premium and size for our international groups of CGUs.
Summary of Key Assumptions, Change In Retail Segment Recoverable Amount	The following table indicates the percentage by which key assumptions would need to change individually for the estimated recoverable amount to be equal to the carrying amount: Change Required for Carrying Amount to Equal Recoverable Value Used in Impairment Key Assumptions Amount Model Terminal growth rate 0.8 percentage point decrease 2.5% Forecasted EBITDA over forecast period 9.1 percent decrease $6 billion Discount rate 0.7 percentage point increase 7.5%

Investments (Tables)

Investments (Tables)	12 Months Ended
Investments (Tables)	Dec. 31, 2020
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Summary of Equity-Accounted Investees and investments at FVTOCI	Equity-accounted investees and investments at FVTOCI as at December 31 were comprised of: Principal Place Proportion of Ownership Interest of Business and and Voting Rights Held (%) Carrying Amount Name Principal Activity Incorporation 2020 2019 2020 2019 Equity-accounted investees MOPCO Nitrogen Producer Egypt - 26 - 270 Profertil Nitrogen Producer Argentina 50 50 233 212 Canpotex Marketing and Logistics Canada 50 50 - - Other associates and joint ventures 176 178 Total equity-accounted investees 409 660 Investments at FVTOCI Sinofert Fertilizer Supplier and Distributor China/Bermuda 22 22 153 161 Total investments at FVTOCI 153 161

Other Assets (Tables)

Other Assets (Tables)	12 Months Ended
Other Assets (Tables)	Dec. 31, 2020
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Summary of Other Assets	Other assets as at December 31 were comprised of: 2020 2019 Deferred income tax assets (Note 8) 242 249 Ammonia catalysts – net of accumulated amortization of $76 (2019 – $71) 89 89 Long-term income tax receivable (Note 8) 305 36 Accrued pension benefit assets (Note 21) 109 25 Other – net of accumulated amortization of $44 (2019 – $41) 169 165 914 564

Short-Term Debt (Tables)

Short-Term Debt (Tables)	12 Months Ended
Short-Term Debt (Tables)	Dec. 31, 2020
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Summary of Short-Term Debt	Short-term debt as at December 31 was comprised of: Rate of Interest (%) Total Facility Limit as at December 31, 2020 2020 2019 Credit facilities Unsecured revolving term credit facility 1 Nil 4,500 - - Uncommitted revolving demand facility Nil 500 - - Other credit facilities 2 0.8 – 36.0 740 159 326 Commercial paper Nil - 650 159 976 1 Matures April 10, 2023, subject to extension at the request of Nutrien provided that the resulting maturity date shall not exceed five years from the date of request. 2 Credit facilities are unsecured and consist of South American facilities with debt of $109 (2019 – $149) and interest rates ranging from 1.7 percent to 36.0 percent, Australian facilities with debt of $19 (2019 – $157) and an interest rate of 0.8 percent, and other facilities with debt of $31 (2019 – $20) and an interest rate of 1.0 percent.

Long-Term Debt (Tables)

Long-Term Debt (Tables)	12 Months Ended
Long-Term Debt (Tables)	Dec. 31, 2020
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Summary of Long-Term Debt	Long-term debt as at December 31 was comprised of: Rate of Interest (%) Maturity 2020 2019 Notes 1 4.875 March 30, 2020 - 500 3.150 October 1, 2022 500 500 1.900 May 13, 2023 500 - 3.500 June 1, 2023 500 500 3.625 March 15, 2024 750 750 3.375 March 15, 2025 550 550 3.000 April 1, 2025 500 500 4.000 December 15, 2026 500 500 4.200 April 1, 2029 750 750 2.950 May 13, 2030 500 - 4.125 March 15, 2035 450 450 7.125 May 23, 2036 300 300 5.875 December 1, 2036 500 500 5.625 December 1, 2040 500 500 6.125 January 15, 2041 500 500 4.900 June 1, 2043 500 500 5.250 January 15, 2045 500 500 5.000 April 1, 2049 750 750 3.950 May 13, 2050 500 - Debentures 1 7.800 February 1, 2027 125 125 Other 67 33 9,742 8,708 Add net unamortized fair value adjustments 404 424 Less net unamortized debt issue costs (85) (77) 10,061 9,055 Less current maturities (14) (508) Add current portion of net unamortized debt issue costs - 6 (14) (502) 10,047 8,553 1 Each series of notes and debentures is unsecured and has no sinking fund requirements prior to maturity. Each series is redeemable and has various provisions that allow redemption prior to maturity, at our option, at specified prices.
Disclosure of reconciliation of liabilities arising from financing activities [text block]	The following is a summary of changes in liabilities arising from financing activities: Short-Term Debt Current and Current Portion of Portion of Lease Long-Term Lease Long-Term Debt Liabilities Debt Liabilities Total Balance – December 31, 2019 1,478 214 8,553 859 11,104 Cash flows 1 (1,401) (274) 1,526 - (149) Additions and other adjustments to ROU assets - 107 - 213 320 Reclassifications 11 194 (11) (194) - Foreign currency translation and other non-cash changes 85 8 (21) 13 85 Balance – December 31, 2020 173 249 10,047 891 11,360 Balance – December 31, 2018 1,624 8 7,579 12 9,223 Adoption of IFRS 16 (Note 13) - 196 - 863 1,059 Cash flows 1 (794) (234) 1,481 - 453 Additions and other adjustments to ROU assets - 50 - 75 125 Reclassifications 500 178 (500) (178) - Foreign currency translation and other non-cash changes 148 16 (7) 87 244 Balance – December 31, 2019 1,478 214 8,553 859 11,104 1 Cash inflows and cash outflows are presented on a net basis.

Lease Liabilities (Tables)

Lease Liabilities (Tables)	12 Months Ended
Lease Liabilities (Tables)	Dec. 31, 2020
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Disclosure Of Finance Lease And Operating Lease By Lessee Explanatory	Average Rate of Interest (%) 2020 2019 Lease liabilities - non-current 3.0 891 859 Current portion of lease liabilities 2.7 249 214 Total 1,140 1,073

Payables and Accrued Charges (T

Payables and Accrued Charges (Tables)	12 Months Ended
Payables and Accrued Charges (Tables)	Dec. 31, 2020
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Summary of Payables and Accrued Charges	Payables and accrued charges as at December 31 were comprised of: 2020 2019 Trade and other payables 4,415 4,016 Customer prepayments 1,800 1,693 Dividends 256 258 Accrued compensation 513 434 Current portion of asset retirement obligations and accrued environmental costs (Note 22) 162 148 Accrued interest 99 103 Current portion of share-based compensation (Note 5) 95 118 Current portion of derivatives 39 13 Income taxes (Note 8) 48 43 Current portion of pension and other post-retirement benefits (Note 21) 15 15 Other accrued charges and others 616 596 8,058 7,437

Pension and Other Post-Retire_2

Pension and Other Post-Retirement Benefits (Tables)	12 Months Ended
Pension and Other Post-Retirement Benefits (Tables)	Dec. 31, 2020
Text block [abstract]
Summary of Movements in Pension and Other Post-Retirement Benefit Assets (Liabilities)	Movements in the pension and other post-retirement benefit assets (liabilities) were as follows: 2020 2019 Plan Plan Obligation Assets Net Obligation Assets Net Balance – beginning of year (2,044) 1,621 (423) (1,797) 1,416 (381) Components of defined benefit expense recognized in earnings Current service cost for benefits earned during the year (36) - (36) (40) - (40) Interest (expense) income (66) 53 (13) (74) 59 (15) Past service cost, including curtailment gains and settlements 1 133 (132) 1 - - - Foreign exchange rate changes and other (3) (1) (4) (29) 13 (16) Subtotal of components of defined benefit expense (recovery) recognized in earnings 28 (80) (52) (143) 72 (71) Remeasurements of the net defined benefit liability recognized in OCI during the year Actuarial gain arising from: Changes in financial assumptions (153) - (153) (199) - (199) Changes in demographic assumptions 12 - 12 14 - 14 Gain on plan assets (excluding amounts included in net interest) - 230 230 - 193 193 Subtotal of remeasurements (141) 230 89 (185) 193 8 Cash flows Contributions by plan participants (5) 5 - (5) 5 - Employer contributions - 26 26 - 21 21 Benefits paid 96 (96) - 86 (86) - Subtotal of cash flows 91 (65) 26 81 (60) 21 Balance – end of year 2 (2,066) 1,706 (360) (2,044) 1,621 (423) Balance comprised of: Non-current assets Other assets (Note 16) 109 25 Current liabilities Payables and accrued charges (Note 20) (15) (15) Non-current liabilities Pension and other post-retirement benefit liabilities (454) (433) 1 During 2020, we transferred certain pension plan obligations to an insurance company. 2 Obligations arising from funded and unfunded pension plans are $(1,690) and $(376), respectively (2019 – $(1,652) and $(392)). Other post-retirement benefit plans have no plan assets and are unfunded.
Summary of Fair Value of Plan Assets of the Defined Benefit Pension Plans, by Asset Category	As at December 31, the fair value of plan assets of our defined benefit pension plans, by asset category, were as follows: 2020 2019 Quoted Prices Quoted Prices in Active in Active Markets for Markets for Identical Assets Other 1 Total Identical Assets Other 1 Total Cash and cash equivalents 9 33 42 8 112 120 Equity securities and equity funds US 19 879 898 1 571 572 International 158 - 158 35 62 97 Debt securities 2 - 571 571 - 698 698 International balanced fund - - - - 112 112 Other - 37 37 - 22 22 Total pension plan assets 186 1,520 1,706 44 1,577 1,621 1 Approximately 76 percent (2019 – 60 percent) of the Other plan assets are held in funds whose fair values are estimated using their net asset value per share. For the majority of these funds, the redemption frequency is immediate. The Plan Committee manages the asset allocation based upon our current liquidity and income needs. 2 Debt securities included US securities of 60 percent (2019 – 82 percent) and International securities of 40 percent (2019 – 18 percent).
Summary of Significant Assumptions Used to Determine Benefit Obligations and Expense	The significant assumptions used to determine the benefit obligations and expense for our significant plans as at and for the year ended December 31 were as follows: Pension Other 2020 2019 2020 2019 Assumptions used to determine the benefit obligations 1 : Discount rate (%) 2.83 3.35 2.66 3.20 Rate of increase in compensation levels (%) 4.57 4.66 n/a n/a Medical cost trend rate – assumed (%) n/a n/a 4.50 – 5.80 2 4.50 – 6.10 2 Medical cost trend rate – year reaches ultimate trend rate n/a n/a 2037 2037 Mortality assumptions 3 (years) Life expectancy at 65 for a male member currently at age 65 20.6 20.5 20.2 20.3 Life expectancy at 65 for a female member currently at age 65 22.8 22.7 22.8 22.9 Average duration of the defined benefit obligations 4 (years) 15.4 14.6 15.2 15.8 1 The current year’s expense is determined using the assumptions that existed at the end of the previous year. 2 We assumed a graded medical cost trend rate starting at 5.80 percent in 2020, moving to 4.50 percent by 2037 (2019 – starting at 6.10 percent, moving to 4.50 percent by 2037). 3 Based on actuarial advice in accordance with the latest available published tables, adjusted where appropriate to reflect future longevity improvements for each country. 4 Weighted average length of the underlying cash flows.
Summary of Significant Assumptions, Change in Discount Rates has Greatest Potential Impact	Of the most significant assumptions, a change in discount rates has the greatest potential impact on our pension and other post-retirement benefit plans, with sensitivity to change as follows: 2020 2019 Expense in Expense in Benefit Earnings Before Benefit Earnings Before Change in Assumption Obligations Income Taxes Obligations Income Taxes As reported 2,066 52 2,044 71 Discount rate 1.0 percentage point decrease 360 10 340 10 1.0 percentage point increase (280) (10) (270) (10)

Asset Retirement Obligations _2

Asset Retirement Obligations and Accrued Environmental Costs (Tables)	12 Months Ended
	Dec. 31, 2020
Text block [abstract]
Summary of Sensitivity of Asset Retirement Obligations and Accrued Environmental Costs to Changes in Discount Rate on Recorded Liability	The pre-tax risk-free discount rate, expected cash flow payments and sensitivity to changes in the discount rate on the recorded liability for asset retirement obligations and accrued environmental costs at December 31, 2020 , were as follows: Cash Flow Discounted Discount Rate Payments (years) 1 Cash Flows 2,3 +0.5% -0.5% Asset retirement obligations (70) 90 Retail 1 – 30 25 Potash 33 – 441 76 Phosphate 1 – 80 468 Corporate and other 4,5 1 – 482 640 Accrued environmental costs (10) 5 Retail 1 – 30 89 Corporate and other 1 – 20 461 1 Time frame in which payments are expected to principally occur from December 31, 2020. Adjustments to the years can result from changes to the mine life and/or changes in the rate of tailing volumes. 2 Risk-free discount rates reflect current market assessments of the time value of money and the risks specific to the timing and jurisdiction of the obligation. Risk-free rates range from 1.2 percent to 6.5 percent. 3 Total undiscounted cash flows are $2.8 billion. For the Potash segment, this represents total undiscounted cash flows in the first year of decommissioning. This excludes subsequent years of tailings dissolution, fine tails capping, tailings management area reclamation, post-reclamation activities and monitoring, and final decommissioning, which are estimated to take an additional 92 to 407 years. 4 For nitrogen sites, we have not recorded any asset retirement obligations as no significant asset retirement obligations have been identified or there is no reasonable basis for estimating a date or range of dates of cessation of operations. We considered the historical performance of our facilities as well as our planned maintenance, major upgrades and replacements, which can extend the useful lives of our facilities indefinitely. 5 Includes certain potash and phosphate sites that are non-operating sites, with the majority of phosphate site payments taking place over the next 55 years.
Summary of Reconciliation of Asset Retirement, Environmental Restoration Obligations	Following is a reconciliation of asset retirement obligations and accrued environmental costs: Asset Accrued Retirement Environmental Obligations Costs Total Balance – December 31, 2019 1,254 544 1,798 Acquisitions 12 15 27 Disposals - (3) (3) Change in estimates (9) 2 (7) Recorded in earnings 31 3 34 Settled during the year (88) (21) (109) Foreign currency translation and other 9 10 19 Balance – December 31, 2020 1,209 550 1,759 Balance – December 31, 2020 comprised of: Current liabilities Payables and accrued charges (Note 20) 121 41 162 Non-current liabilities Asset retirement obligations and accrued environmental costs 1,088 509 1,597

Share Capital (Tables)

Share Capital (Tables)	12 Months Ended
Share Capital (Tables)	Dec. 31, 2020
Text block [abstract]
Summary of Shares Issued	Issued Number of Common Shares Share Capital Balance – December 31, 2019 572,942,809 15,771 Issued under option plans and share-settled plans 150,177 7 Repurchased (3,832,580) (105) Balance – December 31, 2020 569,260,406 15,673
Summary of Share Repurchases	Share Repurchase Programs Commencement Date Expiry Maximum Shares for Repurchase 2019 Normal Course Issuer Bid 1 February 27, 2019 February 26, 2020 42,164,420 2020 Normal Course Issuer Bid 2 February 27, 2020 February 26, 2021 28,572,458 1 The 2019 normal course issuer bid permitted the repurchase of up to 7 percent of our outstanding common shares for cancellation. As of the expiry date, we had repurchased 33,256,668 of the maximum shares for repurchase. 2 The 2020 normal course issuer bid permits the repurchase of up to 5 percent of our outstanding common shares for cancellation and can expire earlier than the date above if we acquire the maximum number of common shares allowable or otherwise decide not to make any further repurchases. As at February 18, 2021, we had repurchased 710,100 of the maximum shares for repurchase. On February 17, 2021, our Board of Directors approved a share repurchase program of up to a maximum of 28,468,448 or 5 percent of our outstanding common shares for cancellation. Subject to acceptance by the Toronto Stock Exchange, the 2021 share repurchase program will commence on March 1, 2021, and will expire on the earlier of February 28, 2022, the date on which we have acquired the maximum number of common shares allowable or the date we determine not to make any further repurchases. Purchases under the normal course issuer bids were, or may be, made through open market purchases at market prices as well as by other means permitted by applicable securities regulatory authorities, including private agreements. The following table summarizes our share repurchases: 2020 2019 Number of common shares repurchased for cancellation 3,832,580 36,067,323 Average price per share (US dollars) 41.96 52.07 Total cost 160 1,878
Dividends Declared	Dividends Declared Dividends declared for the years ended December 31 were as follows: 2020 2019 Declared Per Share Declared Per Share February 19, 2020 0.45 May 10, 2019 0.43 May 6, 2020 0.45 July 30, 2019 0.45 August 10, 2020 0.45 December 13, 2019 0.45 December 10, 2020 0.45 1.80 1.33

Capital Management (Tables)

Capital Management (Tables)	12 Months Ended
Capital Management (Tables)	Dec. 31, 2020
Text block [abstract]
Schedule of Adjusted Net Debt, Adjusted Shareholders' Equity and Adjusted Capital	We monitor the following ratios: 2020 2019 Adjusted net debt to adjusted EBITDA 2.6 2.5 Debt to capital 1 (Limit: 0.65:1.00) 0.34:1.00 0.33:1:00 Adjusted EBITDA to adjusted finance costs 7.4 8.0 1 Calculated as adjusted total debt to adjusted capital.
Components of Ratios	Adjusted EBITDA is calculated in Note 3 , while the calculation of the remaining components included in the above ratios are set out in the following tables: 2020 2019 Short-term debt 159 976 Current portion of long-term debt 14 502 Current portion of lease liabilities 249 214 Long-term debt 10,047 8,553 Lease liabilities 891 859 Total debt 11,360 11,104 Letters of credit - financial 150 158 Adjusted total debt 11,510 11,262 2020 2019 Total debt 11,360 11,104 Cash and cash equivalents (1,454) (671) Unamortized fair value adjustments (404) (424) Adjusted net debt 9,502 10,009 2020 2019 Total shareholders' equity 22,365 22,869 Accumulated other comprehensive loss 119 251 Adjusted shareholders' equity 22,484 23,120 Adjusted total debt 11,510 11,262 Adjusted capital 33,994 34,382 2020 2019 Finance costs 520 554 Unwinding of discount on asset retirement obligations (33) (54) Borrowing costs capitalized to property, plant and equipment 20 18 Interest on net defined benefit pension and other post-retirement plan obligations (13) (15) Adjusted finance costs 494 503

Business Combinations (Tables)

Business Combinations (Tables)	12 Months Ended
Business Combinations (Tables)	Dec. 31, 2020
Statement [LineItems]
Summary Of General Information About Business Combinations Explanatory	Ruralco Other Acquisitions Acquisition date September 30, 2019 Various Purchase price, net of cash and cash equivalents acquired $330 On the acquisition date, we acquired 100% of the Ruralco stock that was issued and outstanding. Transaction costs are recorded in acquisition and integration related costs in other expenses. 2020 – $233 (2019 – $581, net of $100 previously held equity-accounted interest in Agrichem ) Goodwill and expected benefits of the acquisition $ 236 $ 133 (2019 – $341 ) The expected benefits of the acquisitions resulting in goodwill include: synergies from expected reduction in operating costs wider distribution channel for selling products of acquired businesses a larger assembled workforce potential increase in customer base enhanced ability to innovate Description An agriservices business in Australia with approximately 250 operating locations. 2020 – 43 Retail locations including Tec Agro Group, a leading agriculture retailer in Brazil (2019 – 68 Retail locations including Actagro, LLC, a developer, manufacturer and marketer of environmentally sustainable soil and plant health products and technologies)
Summary of Fair Value Allocated to Assets and Liabilities	We allocated the following values to the acquired assets and assumed liabilities based upon fair values at their respective acquisition date: 2020 2019 Ruralco Final Other Other Preliminary 1 Adjustments Fair Value 2 Acquisitions 3 Acquisitions 3 Receivables 289 27 316 4 68 68 Inventories 117 (5) 112 63 145 Prepaid expenses and other current assets 8 (1) 7 4 38 Property, plant and equipment 136 4 140 73 115 Goodwill 202 34 236 133 341 Other intangible assets 165 43 208 47 179 Other non-current assets 31 (14) 17 2 2 Total assets 948 88 1,036 390 888 Short-term debt 112 55 167 36 25 Payables and accrued charges 345 (21) 324 108 156 Lease liabilities, including current portion 110 - 110 2 1 Other non-current liabilities 51 54 105 11 25 Total liabilities 618 88 706 157 207 Total consideration 330 - 330 233 681 Previously held equity-accounted interest in Agrichem - - - - 100 Total consideration, net of cash and cash equivalents acquired 330 - 330 233 581 1 Preliminary value as previously reported in our 2019 annual consolidated financial statements. 2 We have completed our assessment of identifying and measuring all the assets acquired and liabilities assumed. This assessment included a thorough review of all internal and external sources of information available on circumstances that existed at the acquisition date. We engaged independent valuation experts to assist in determining the fair value of certain assets acquired and liabilities assumed. Adjustments recorded to the preliminary fair value primarily related to changes in the preliminary valuation assumptions, including refinement of our intangible assets and liabilities. All measurement adjustments were offset against goodwill. 3 This represents preliminary fair values. For certain acquisitions, we finalized the purchase price with no material change to the fair values disclosed in prior periods. 4 Includes receivables from customers with gross contractual amounts of $260, of which $7 are considered to be uncollectible.
Summary of Gross Sales and Net Earnings from Continuing Operations Before Income Taxes	2020 Actuals 2019 Actuals From date of acquisition Other Acquisitions Ruralco Other Acquisitions Sales 190 249 312 EBIT 12 (2) (1)
Summary of Proforma Financial Information	Financial Information Related to the Acquired Operations 2020 Proforma 1 Other Acquisitions Sales 350 EBIT 26 1 Estimated annual sales and earnings before finance costs and income taxes ("EBIT") if acquisitions occurred at the beginning of the year.

Commitments (Tables)

Commitments (Tables)	12 Months Ended
Commitments (Tables)	Dec. 31, 2020
Text block [abstract]
Summary of Minimum Future Commitments Under Contractual Agreements	At December 31, 2020 , minimum future commitments under our contractual arrangements were as follows: Lease Long-Term Purchase Capital Other Liabilities 1 Debt 1 Commitments Commitments Commitments Total Within 1 year 281 434 1,268 87 132 2,202 1 to 3 years 408 2,378 757 16 118 3,677 3 to 5 years 233 2,498 72 6 53 2,862 Over 5 years 383 10,485 142 1 127 11,138 Total 1,305 15,795 2,239 110 430 19,879 1 Includes principal portion and estimated interest.

Related Party Transactions (Tab

Related Party Transactions (Tables)	12 Months Ended
Related Party Transactions (Tables)	Dec. 31, 2020
Text block [abstract]
Compensation to Key Management Personnel	Compensation to key management personnel was comprised of: 2020 2019 Salaries and other short-term benefits 16 15 Share-based compensation 26 31 Post-employment benefits 2 3 Termination benefits - 12 44 61

Description of Business - Addit

Description of Business - Additional Information (Detail)	12 Months Ended
Description of Business - Additional Information (Detail)	Dec. 31, 2020
Sinofert [Member]
Disclosure of description of business [Line Items]
Proportion of ownership interest in associate	22.00%
Potash [Member] \| Province of Saskatchewan [Member]
Disclosure of description of business [Line Items]
Number of operations	6
Nitrogen [Member] \| North America [Member] \| Production facilities [Member]
Disclosure of description of business [Line Items]
Number of plants	8
Nitrogen [Member] \| North America [Member] \| Upgrade facilities [Member]
Disclosure of description of business [Line Items]
Number of plants	6
Nitrogen [Member] \| Alberta [Member] \| North America [Member] \| Production facilities [Member]
Disclosure of description of business [Line Items]
Number of plants	4
Nitrogen [Member] \| Alberta [Member] \| North America [Member] \| Upgrade facilities [Member]
Disclosure of description of business [Line Items]
Number of plants	3
Nitrogen [Member] \| Texas [Member] \| North America [Member] \| Production facilities [Member]
Disclosure of description of business [Line Items]
Number of plants	1
Nitrogen [Member] \| Georgia [Member] \| North America [Member] \| Production facilities [Member]
Disclosure of description of business [Line Items]
Number of plants	1
Nitrogen [Member] \| Georgia [Member] \| North America [Member] \| Upgrade facilities [Member]
Disclosure of description of business [Line Items]
Number of plants	1
Nitrogen [Member] \| Louisiana [Member] \| North America [Member] \| Production facilities [Member]
Disclosure of description of business [Line Items]
Number of plants	1
Nitrogen [Member] \| Ohio [Member] \| North America [Member] \| Production facilities [Member]
Disclosure of description of business [Line Items]
Number of plants	1
Nitrogen [Member] \| Trinidad [Member]
Disclosure of description of business [Line Items]
Number of plants	1
Nitrogen [Member] \| Washington [Member] \| North America [Member] \| Upgrade facilities [Member]
Disclosure of description of business [Line Items]
Number of plants	1
Nitrogen [Member] \| Missouri [Member] \| North America [Member] \| Upgrade facilities [Member]
Disclosure of description of business [Line Items]
Number of plants	1
Nitrogen [Member] \| Argentina [Member] \| Profertil S.A. [Member]
Disclosure of description of business [Line Items]
Percentage of investment in joint venture	50.00%
Phosphate [Member]
Disclosure of description of business [Line Items]
Number of mines and processing plants	2
Phosphate [Member] \| Ohio [Member]
Disclosure of description of business [Line Items]
Number of plants	1
Phosphate [Member] \| North Carolina [Member]
Disclosure of description of business [Line Items]
Number of mines and processing plants	1
Phosphate [Member] \| Florida [Member]
Disclosure of description of business [Line Items]
Number of mines and processing plants	1
Corporate and Others Segment [Member] \| China [Member] \| Sinofert [Member]
Disclosure of description of business [Line Items]
Proportion of ownership interest in associate	22.00%

Segment Information - Additiona

Segment Information - Additional Information (Detail) - Segment	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of operating segments [Line Items]
Number of reportable operating segments	4	4

Segment Information - Summary o

Segment Information - Summary of Financial Information on Segments (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of operating segments [Line Items]
Sales	$ 20,908	$ 20,084
Freight, transportation and distribution	855	768
Net sales	20,053	19,316
Cost of goods sold	14,814	13,814
GROSS MARGIN	5,239	5,502
Selling expense	2,813	2,505
General and administrative expense	429	404
Provincial mining and other taxes	204	292
Share-based compensation expense	69	104
Impairment of assets (Note 13)	824	120
Other expenses (income)	(2)	215
Earnings (loss) before finance costs	902	1,862
EBITDA	2,891	3,661
Acquisition and integration related costs	60	16
Covid 19 Related Expenses	48	0
Foreign exchange loss, net of related derivatives	18	42
Loss on Disposal of Business	6	0
Net gain on disposal of investment in MOPCO (Note 15)	250	0
Adjusted EBITDA	3,667	4,025
Assets	47,192	46,799
Eliminations [Member]
Disclosure of operating segments [Line Items]
Sales	(1,115)	(1,060)
Freight, transportation and distribution	(213)	(141)
Net sales	(902)	(919)
Cost of goods sold	(923)	(924)
GROSS MARGIN	21	5
Selling expense	0	0
General and administrative expense	0	0
Provincial mining and other taxes		0
Share-based compensation expense		0
Impairment of assets (Note 13)	0	0
Other expenses (income)	0	0
Earnings (loss) before finance costs	21	5
Depreciation and amortization	0	0
EBITDA	21	5
Merger and related costs		0
Acquisition and integration related costs	0	0
Covid 19 Related Expenses	0
Foreign exchange loss, net of related derivatives	0	0
Loss on Disposal of Business	0
Net gain on disposal of investment in MOPCO (Note 15)	0
Adjusted EBITDA	21	5
Assets	(423)	(205)
Third parties [Member]
Disclosure of operating segments [Line Items]
Sales	0	0
Nitrogen [Member]
Disclosure of operating segments [Line Items]
Sales	3,200	3,220
Freight, transportation and distribution	460	372
Net sales	2,740	2,848
Cost of goods sold	2,265	2,148
GROSS MARGIN	475	700
Selling expense	27	25
General and administrative expense	8	15
Provincial mining and other taxes	1	2
Share-based compensation expense		0
Impairment of assets (Note 13)	27	0
Other expenses (income)	(288)	(46)
Earnings (loss) before finance costs	700	704
Depreciation and amortization	599	535
EBITDA	1,299	1,239
Merger and related costs		0
Acquisition and integration related costs	(4)	0
Covid 19 Related Expenses	0
Foreign exchange loss, net of related derivatives	0	0
Loss on Disposal of Business	0
Net gain on disposal of investment in MOPCO (Note 15)	(250)
Adjusted EBITDA	1,080	1,239
Assets	10,612	10,991
Nitrogen [Member] \| Eliminations [Member]
Disclosure of operating segments [Line Items]
Sales	628	612
Nitrogen [Member] \| Third parties [Member]
Disclosure of operating segments [Line Items]
Sales	2,572	2,608
Retail [Member] \| Operating segments [Member]
Disclosure of operating segments [Line Items]
Sales	14,785	13,282
Freight, transportation and distribution	0	0
Net sales	14,785	13,282
Cost of goods sold	11,049	9,981
GROSS MARGIN	3,736	3,301
Selling expense	2,795	2,484
General and administrative expense	135	112
Provincial mining and other taxes		0
Share-based compensation expense		0
Impairment of assets (Note 13)	0	0
Other expenses (income)	44	69
Earnings (loss) before finance costs	762	636
Depreciation and amortization	668	595
EBITDA	1,430	1,231
Merger and related costs		0
Acquisition and integration related costs	0	0
Covid 19 Related Expenses	0
Foreign exchange loss, net of related derivatives	0	0
Loss on Disposal of Business	0
Net gain on disposal of investment in MOPCO (Note 15)	0
Adjusted EBITDA	1,430	1,231
Assets	20,526	19,990
Retail [Member] \| Eliminations [Member]
Disclosure of operating segments [Line Items]
Sales	37	38
Retail [Member] \| Third parties [Member]
Disclosure of operating segments [Line Items]
Sales	14,748	13,244
Potash [Member]
Disclosure of operating segments [Line Items]
Sales	2,513	2,909
Freight, transportation and distribution	367	305
Net sales	2,146	2,604
Cost of goods sold	1,183	1,103
GROSS MARGIN	963	1,501
Selling expense	9	9
General and administrative expense	7	6
Provincial mining and other taxes	201	287
Share-based compensation expense		0
Impairment of assets (Note 13)	23	0
Other expenses (income)	8	(4)
Earnings (loss) before finance costs	715	1,203
Depreciation and amortization	452	390
EBITDA	1,167	1,593
Merger and related costs		0
Acquisition and integration related costs	0	0
Covid 19 Related Expenses	0
Foreign exchange loss, net of related derivatives	0	0
Loss on Disposal of Business	0
Net gain on disposal of investment in MOPCO (Note 15)	0
Adjusted EBITDA	1,190	1,593
Assets	12,032	11,696
Potash [Member] \| Eliminations [Member]
Disclosure of operating segments [Line Items]
Sales	248	207
Potash [Member] \| Third parties [Member]
Disclosure of operating segments [Line Items]
Sales	2,265	2,702
Phosphate [Member]
Disclosure of operating segments [Line Items]
Sales	1,443	1,600
Freight, transportation and distribution	241	232
Net sales	1,202	1,368
Cost of goods sold	1,166	1,373
GROSS MARGIN	36	(5)
Selling expense	6	5
General and administrative expense	10	7
Provincial mining and other taxes	0	1
Share-based compensation expense		0
Impairment of assets (Note 13)	769	0
Other expenses (income)	6	25
Earnings (loss) before finance costs	(755)	(43)
Depreciation and amortization	218	237
EBITDA	(537)	194
Merger and related costs		0
Acquisition and integration related costs	0	0
Covid 19 Related Expenses	0
Foreign exchange loss, net of related derivatives	0	0
Loss on Disposal of Business	0
Net gain on disposal of investment in MOPCO (Note 15)	0
Adjusted EBITDA	232	194
Assets	1,462	2,198
Phosphate [Member] \| Eliminations [Member]
Disclosure of operating segments [Line Items]
Sales	202	203
Phosphate [Member] \| Third parties [Member]
Disclosure of operating segments [Line Items]
Sales	1,241	1,397
Corporate and Others [Member]
Disclosure of operating segments [Line Items]
Sales	82	133
Freight, transportation and distribution	0	0
Net sales	82	133
Cost of goods sold	74	133
GROSS MARGIN	8	0
Selling expense	(24)	(18)
General and administrative expense	269	264
Provincial mining and other taxes	2	2
Share-based compensation expense	69	104
Impairment of assets (Note 13)	5	120
Other expenses (income)	228	171
Earnings (loss) before finance costs	(541)	(643)
Depreciation and amortization	52	42
EBITDA	(489)	(601)
Merger and related costs		82
Acquisition and integration related costs	(56)	(16)
Covid 19 Related Expenses	48
Foreign exchange loss, net of related derivatives	19	42
Loss on Disposal of Business	6
Net gain on disposal of investment in MOPCO (Note 15)	0
Adjusted EBITDA	(286)	(237)
Assets	2,983	2,129
Corporate and Others [Member] \| Eliminations [Member]
Disclosure of operating segments [Line Items]
Sales	0	0
Corporate and Others [Member] \| Third parties [Member]
Disclosure of operating segments [Line Items]
Sales	$ 82	$ 133

Segment Information - Summary_2

Segment Information - Summary of Financial Information by Geographical Area (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of geographical areas [Line Items]
Sales	$ 20,908	$ 20,084
Non-current assets	35,216	35,690
Retail business unit [Member]
Disclosure of geographical areas [Line Items]
Sales	14,785	13,282
Potash [Member]
Disclosure of geographical areas [Line Items]
Sales	2,513	2,909
Nitrogen [Member]
Disclosure of geographical areas [Line Items]
Sales	3,200	3,220
Phosphate [Member]
Disclosure of geographical areas [Line Items]
Sales	1,443	1,600
Canpotex customer [Member]
Disclosure of geographical areas [Line Items]
Sales	1,238	1,625
Non-current assets	0	0
United States customer [Member]
Disclosure of geographical areas [Line Items]
Sales	12,373	12,561
Non-current assets	15,268	15,685
Canada customer [Member]
Disclosure of geographical areas [Line Items]
Sales	2,565	2,504
Non-current assets	17,435	17,503
Trinidad customer [Member]
Disclosure of geographical areas [Line Items]
Sales	101	113
Non-current assets	644	691
Brazil customer [Member]
Disclosure of geographical areas [Line Items]
Sales		109
Other Latin America and Europe Customer [Member]
Disclosure of geographical areas [Line Items]
Sales	561	597
Other customers [Member]
Disclosure of geographical areas [Line Items]
Sales	1,400	1,320
Non-current assets	564	639
Australia customer [Member]
Disclosure of geographical areas [Line Items]
Sales	3,231	1,961
Non-current assets	1,305	1,172
Argentina Customer [Member]
Disclosure of geographical areas [Line Items]
Sales	372	404
Europe customer [Member]
Disclosure of geographical areas [Line Items]
Sales	$ 183	$ 210

Segment Information - Summary_3

Segment Information - Summary of Financial Information by Geographical Area (Parenthetica)l (Detail) - Sales revenue [Member] - Canpotex customer [Member]	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Latin America [Member]
Disclosure of geographical areas [Line Items]
Sales volume percentage	32.00%	31.00%
China [Member]
Disclosure of geographical areas [Line Items]
Sales volume percentage	22.00%	22.00%
India [Member]
Disclosure of geographical areas [Line Items]
Sales volume percentage	14.00%	10.00%
Other Asian markets [Member]
Disclosure of geographical areas [Line Items]
Sales volume percentage	25.00%	27.00%
Other markets [Member]
Disclosure of geographical areas [Line Items]
Sales volume percentage	7.00%	10.00%

Segment Information - Summary_4

Segment Information - Summary of Disaggregated Revenue from Contracts with Customers by Product Line or Geographic Location for Each Reportable Segment (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of disaggregation of revenue from contracts with customers [Line Items]
Revenue from contracts with customers	$ 20,908	$ 20,084
Retail business unit [Member]
Disclosure of disaggregation of revenue from contracts with customers [Line Items]
Revenue from contracts with customers	14,785	13,282
Retail business unit [Member] \| Crop nutrients [Member]
Disclosure of disaggregation of revenue from contracts with customers [Line Items]
Revenue from contracts with customers	5,200	4,989
Retail business unit [Member] \| Crop protection products [Member]
Disclosure of disaggregation of revenue from contracts with customers [Line Items]
Revenue from contracts with customers	5,602	4,983
Retail business unit [Member] \| Seed [Member]
Disclosure of disaggregation of revenue from contracts with customers [Line Items]
Revenue from contracts with customers	1,790	1,712
Retail business unit [Member] \| Merchandise [Member]
Disclosure of disaggregation of revenue from contracts with customers [Line Items]
Revenue from contracts with customers	943	598
Retail business unit [Member] \| Nutrien Financial [Member]
Disclosure of disaggregation of revenue from contracts with customers [Line Items]
Revenue from contracts with customers	129	0
Retail business unit [Member] \| Services and others [Member]
Disclosure of disaggregation of revenue from contracts with customers [Line Items]
Revenue from contracts with customers	1,241	1,000
Retail business unit [Member] \| Nutrien Financial elimination [Member]
Disclosure of disaggregation of revenue from contracts with customers [Line Items]
Revenue from contracts with customers	(120)	0
Potash [Member]
Disclosure of disaggregation of revenue from contracts with customers [Line Items]
Revenue from contracts with customers	2,513	2,909
Potash [Member] \| Other Potash And Purchased Products [Member]
Disclosure of disaggregation of revenue from contracts with customers [Line Items]
Revenue from contracts with customers	0	1
Potash [Member] \| North America [Member]
Disclosure of disaggregation of revenue from contracts with customers [Line Items]
Revenue from contracts with customers	1,275	1,283
Potash [Member] \| Offshore [Member]
Disclosure of disaggregation of revenue from contracts with customers [Line Items]
Revenue from contracts with customers	1,238	1,625
Nitrogen [Member]
Disclosure of disaggregation of revenue from contracts with customers [Line Items]
Revenue from contracts with customers	3,200	3,220
Nitrogen [Member] \| Ammonia [Member]
Disclosure of disaggregation of revenue from contracts with customers [Line Items]
Revenue from contracts with customers	779	884
Nitrogen [Member] \| Urea [Member]
Disclosure of disaggregation of revenue from contracts with customers [Line Items]
Revenue from contracts with customers	1,040	1,019
Nitrogen [Member] \| Solutions and nitrates [Member]
Disclosure of disaggregation of revenue from contracts with customers [Line Items]
Revenue from contracts with customers	816	812
Nitrogen [Member] \| Other nitrogen and purchased products [Member]
Disclosure of disaggregation of revenue from contracts with customers [Line Items]
Revenue from contracts with customers	565	505
Phosphate [Member]
Disclosure of disaggregation of revenue from contracts with customers [Line Items]
Revenue from contracts with customers	1,443	1,600
Phosphate [Member] \| Fertilizer [Member]
Disclosure of disaggregation of revenue from contracts with customers [Line Items]
Revenue from contracts with customers	838	944
Phosphate [Member] \| Industrial and Feed [Member]
Disclosure of disaggregation of revenue from contracts with customers [Line Items]
Revenue from contracts with customers	454	475
Phosphate [Member] \| Other phosphate and purchased products [Member]
Disclosure of disaggregation of revenue from contracts with customers [Line Items]
Revenue from contracts with customers	$ 151	$ 181

Nature of Expenses - Summary of

Nature of Expenses - Summary of Detailed Information about Expenses by Nature (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of expenses [Line Items]
Total	$ 20,006	$ 18,222
Purchased and produced raw materials and product for resale [Member]
Disclosure of expenses [Line Items]
Total	12,110	11,335
Depreciation and amortization [Member]
Disclosure of expenses [Line Items]
Total	1,989	1,799
Employee costs [Member]
Disclosure of expenses [Line Items]
Total	2,450	2,205
Freight [Member]
Disclosure of expenses [Line Items]
Total	963	845
Impairment of assets [Member]
Disclosure of expenses [Line Items]
Total	824	120
Off-site warehouse costs [Member]
Disclosure of expenses [Line Items]
Total	60	51
Merger and related costs [Member]
Disclosure of expenses [Line Items]
Total	0	82
Acquisition and integration related costs [Member]
Disclosure of expenses [Line Items]
Total	60	16
Fleet fuel, repairs and maintenance [Member]
Disclosure of expenses [Line Items]
Total	222	202
Other [Member]
Disclosure of expenses [Line Items]
Total	649	642
Provincial Mining And Other Taxes [Member]
Disclosure of expenses [Line Items]
Total	204	292
Lease expense [Member]
Disclosure of expenses [Line Items]
Total	60	66
Contract Services [Member]
Disclosure of expenses [Line Items]
Total	617	567
COVID-19 [Member]
Disclosure of expenses [Line Items]
Total	48	0
Net Gain On Disposal Of Investment In Mopco [Member]
Disclosure of expenses [Line Items]
Total	$ (250)	$ 0

Nature of Expenses - Summary _2

Nature of Expenses - Summary of Detailed Information about Expenses by Nature (Parenthetical) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure Of Provincial Mining And Other Taxes [abstract]
Saskatchewan potash production tax	$ 86	$ 190
Saskatchewan resource surcharge and other	118	102
Total	$ 204	$ 292

Share-Based Compensation - Summ

Share-Based Compensation - Summary of Stock Option Plan granted (Detail)	12 Months Ended
	Dec. 31, 2020
Stock Options [Member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Eligibility	Officers and eligible employees
Granted	Annually
Vesting Period	25% per year over four years
Maximum term	10 years
Settlement Period	Shares
Units Granted	2,293,802
Units Outstanding	10,997,892
Performance share units (PSUs) [Member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Eligibility	Officers and eligible employees
Granted	Annually
Vesting Period	On third anniversary of grant date based on total shareholder return over a three-year performance cycle, compared to average total shareholder return of a peer group of companies over the same period
Maximum term	Not applicable
Settlement Period	Cash
Units Granted	794,017
Units Outstanding	1,879,160
Restricted share units (RSUs) [Member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Eligibility	Eligible employees
Granted	Annually
Vesting Period	On third anniversary of grant date and are not subject to performance conditions
Maximum term	Not applicable
Settlement Period	Cash
Units Granted	486,194
Units Outstanding	1,304,858
Deferred Share Units (DSUs) [Member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Eligibility	Non-executive directors
Granted	At the discretion of the Board of Directors
Vesting Period	Fully vest upon grant
Maximum term	Not applicable
Settlement Period	Cash 1
Units Granted	49,424
Units Outstanding	369,267
Stock Appreciation Rights (SAR) and Tandem Stock Appreciation Rights (TSAR) [Member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Eligibility	Awards no longer granted; legacy awards only
Granted	Awards no longer granted; legacy awards only
Vesting Period	25% per year over four years
Maximum term	10 years
Settlement Period	Cash
Units Granted	0
Units Outstanding	1,576,172

Share-Based Compensation - Addi

Share-Based Compensation - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Weighted average grant date fair value of stock options per unit	$ 7.18	$ 11.27
Aggregate grant-date fair value of all options granted	$ 16,000,000
Average share price	$ 38.87

Share-Based Compensation - Su_2

Share-Based Compensation - Summary of Weighted Average Assumptions in Stock Options (Detail)	12 Months Ended
	Dec. 31, 2020yr$ / shares	Dec. 31, 2019$ / shares
2020 [Member]
Disclosure Of Share Based Compensation Expense [Line Items]
Exercise price per option \| $ / shares	$ 42.23
Expected annual dividend yield	4.36%
Expected volatility	29.00%
Risk-free interest rate	1.51%
Average expected life of options (years) \| yr	8.50
2019 [Member]
Disclosure Of Share Based Compensation Expense [Line Items]
Exercise price per option \| $ / shares		$ 53.54
Expected annual dividend yield	3.22%
Expected volatility	27.00%
Risk-free interest rate	2.55%
Average expected life of options (years) \| yr	7.50

Share-Based Compensation - Su_3

Share-Based Compensation - Summary of Stock Option Plans (Detail)	12 Months Ended
	Dec. 31, 2020shares$ / shares	Dec. 31, 2019shares$ / shares
Disclosure Of Number And Weighted Average Exercise Price Of Outstanding Share Options [Line Items]
Number of shares subject to option, Outstanding, beginning of year \| shares	9,191,480	9,044,237
Number of shares subject to option, Granted \| shares	2,293,802	1,376,533
Number of shares subject to option, Exercised \| shares	(123,403)	(451,574)
Number of shares subject to option, Forfeited or cancelled \| shares	(34,506)	(502,016)
Number of shares subject to option, Expired \| shares	(329,481)	(275,700)
Number of shares subject to option, Outstanding, end of year	10,997,892	9,191,480
Weighted average exercise price, Balance - beginning of year	$ 56.88	$ 58.41
Weighted average exercise price, Granted	42.23	53.54
Weighted average exercise price, Exercised	42.24	42.73
Weighted average exercise price, Forfeited or cancelled	57.45	86.53
Weighted average exercise price, Expired	75.92	76.59
Weighted average exercise price, Outstanding, end of year	$ 53.59	$ 56.88

Share-Based Compensation - Su_4

Share-Based Compensation - Summary of Stock Options Outstanding (Detail)	12 Months Ended
	Dec. 31, 2020$ / shares	Dec. 31, 2019shares$ / shares	Dec. 31, 2018shares$ / shares
Disclosure of range of exercise prices of outstanding share options [Line Items]
Range of Exercise Prices	$ 53.59
Options Outstanding, Number	10,997,892	9,191,480	9,044,237
Options Outstanding, Weighted Average Remaining Life in Years	6 years
Options Outstanding, Weighted Average Exercise Price	$ 53.59	$ 56.88	$ 58.41
Options Exercisable, Number	7,233,834
Options Exercisable, Weighted Average Exercise Price	$ 57.97
$37.84 to $41.60 [Member]
Disclosure of range of exercise prices of outstanding share options [Line Items]
Range of Exercise Prices	$ 38.71
Options Outstanding, Number	1,647,297
Options Outstanding, Weighted Average Remaining Life in Years	5 years
Options Exercisable, Number	1,647,297
Options Exercisable, Weighted Average Exercise Price	$ 38.71
$41.61 to $43.36 [Member]
Disclosure of range of exercise prices of outstanding share options [Line Items]
Range of Exercise Prices	$ 42.23
Options Outstanding, Number	2,293,802
Options Outstanding, Weighted Average Remaining Life in Years	9 years
Options Exercisable, Number	0
Options Exercisable, Weighted Average Exercise Price	$ 0
$43.37 to $45.40 [Member]
Disclosure of range of exercise prices of outstanding share options [Line Items]
Range of Exercise Prices	$ 44.5
Options Outstanding, Number	1,492,667
Options Outstanding, Weighted Average Remaining Life in Years	7 years
Options Exercisable, Number	988,275
Options Exercisable, Weighted Average Exercise Price	$ 44.5
$45.41 to $52.75 [Member]
Disclosure of range of exercise prices of outstanding share options [Line Items]
Range of Exercise Prices	$ 48.74
Options Outstanding, Number	2,239,358
Options Outstanding, Weighted Average Remaining Life in Years	5 years
Options Exercisable, Number	2,098,294
Options Exercisable, Weighted Average Exercise Price	$ 48.91
$52.76 to $78.86 [Member]
Disclosure of range of exercise prices of outstanding share options [Line Items]
Range of Exercise Prices	$ 57.6
Options Outstanding, Number	1,645,867
Options Outstanding, Weighted Average Remaining Life in Years	7 years
Options Exercisable, Number	821,067
Options Exercisable, Weighted Average Exercise Price	$ 61.68
$78.87 to $130.78 [Member]
Disclosure of range of exercise prices of outstanding share options [Line Items]
Range of Exercise Prices	$ 94.31
Options Outstanding, Number	1,678,901
Options Outstanding, Weighted Average Remaining Life in Years	2 years
Options Exercisable, Number	1,678,901
Options Exercisable, Weighted Average Exercise Price	$ 94.31

Share-Based Compensation - Su_5

Share-Based Compensation - Summary of Compensation Expense by Plan (Detail)	12 Months Ended
	Dec. 31, 2020shares	Dec. 31, 2019shares	Dec. 31, 2018shares
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Units Granted	2,293,802	1,376,533
Units Outstanding	10,997,892	9,191,480	9,044,237

Share-Based Compensation - Comp

Share-Based Compensation - Compensation Expense for all Employee and Director Share-based Compensation Plans (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Compensation expense	$ 69	$ 104
Stock Options [Member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Compensation expense	14	19
Performance share units (PSUs) [Member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Compensation expense	31	65
Restricted share units (RSUs) [Member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Compensation expense	22	18
Stock Appreciation Rights (SAR) and Tandem Stock Appreciation Rights (TSAR) [Member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Compensation expense	0	0
Deferred Share Units (DSUs) [Member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Compensation expense	$ 2	$ 2

Other Expenses - Summary of Det

Other Expenses - Summary of Detailed Information About Other Income and Expenses (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Other Operating Income Expense [abstract]
Merger and related costs	$ 0	$ 82
Acquisition and integration related costs	60	16
Foreign exchange loss, net of related derivatives	18	42
Earnings of equity-accounted investees	(73)	(66)
Bad debts expense	6	(24)
Other expenses	183	117
Covid 19 Related Expenses	48	0
Loss on Disposal of Business	6	0
Net gain on disposal of investment in MOPCO (Note 15)	250	0
Other (expenses) income	$ (2)	$ 215

Finance Costs - Summary of Fina

Finance Costs - Summary of Finance Costs (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of finance costs [Line Items]
Unwinding of discount on asset retirement obligations (Note 22)	$ 33	$ 54
Interest on net defined benefit pension and other post-retirement plan obligations (Note 21)	13	15
Borrowing costs capitalized to property, plant and equipment	(20)	(18)
Interest income	(1)	(5)
Total Finance costs	520	554
Short-term debt [Member]
Disclosure of finance costs [Line Items]
Interest expense	50	87
Long-term debt [Member]
Disclosure of finance costs [Line Items]
Interest expense	392	387
Lease Liabilities [Member]
Disclosure of finance costs [Line Items]
Interest expense	34	34
COVID-19 [Member]
Disclosure of finance costs [Line Items]
Interest expense	$ 19	$ 0

Finance Costs - Additional Info

Finance Costs - Additional Information (Detail)	12 Months Ended
Finance Costs - Additional Information (Detail)	Dec. 31, 2020	Dec. 31, 2019
Disclosure of finance costs [abstract]
Average capitalization rate	3.90%	4.60%

Income Taxes - Summary of Provi

Income Taxes - Summary of Provision for Income Taxes (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of income tax expense benefits [Line Items]
Earnings (loss) before income taxes	$ 382	$ 1,308
Canadian federal and provincial statutory income tax rate	27.00%	27.00%
Income tax at statutory rates	$ 103	$ 353
Adjusted for the effect of:
Impact of foreign tax rates	(18)	(45)
Recovery of prior year taxes due to US legislative changes	(94)	0
Production-related deductions	(12)	(17)
Non-taxable income	(59)	(19)
Change in recognition of tax losses and deductible temporary differences	(20)	0
Impact of tax rate changes	(3)	16
Non-deductible expenses	13	15
Foreign accrual property income	7	18
Other	6	(5)
Income tax (recovery) expense included in net earnings	(77)	316
Canada [Member]
Disclosure of income tax expense benefits [Line Items]
Earnings (loss) before income taxes	525	765
United States [Member]
Disclosure of income tax expense benefits [Line Items]
Earnings (loss) before income taxes	(506)	315
Australia [Member]
Disclosure of income tax expense benefits [Line Items]
Earnings (loss) before income taxes	83	27
Trinidad [Member]
Disclosure of income tax expense benefits [Line Items]
Earnings (loss) before income taxes	(44)	(28)
Other markets [Member]
Disclosure of income tax expense benefits [Line Items]
Earnings (loss) before income taxes	$ 324	$ 229

Income Taxes - Summary of Total

Income Taxes - Summary of Total Income Tax Expense (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Current income tax
Tax (recovery) expense for current year	$ (38)	$ 161
Adjustments in respect of prior years	(30)	(22)
Total current income tax (recovery) expense	(68)	139
Deferred income tax
Origination and reversal of temporary differences	72	152
Adjustments in respect of prior years	(58)	9
Change in recognition of tax losses and deductible temporary differences	(20)	0
Impact of tax rate changes	(3)	16
Total deferred income tax expense (recovery)	(9)	177
Income tax (recovery) expense included in net earnings	$ (77)	$ 316

Income Taxes - Summary of Defer

Income Taxes - Summary of Deferred Income Tax Assets (Liabilities) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Deferred income tax assets	$ 242	$ 249
Deferred income tax liabilities	3,149	3,145
Deferred income tax liability	2,907	2,896	$ 2,691
Deferred income tax expense recognized in net earning	(9)	177
Asset retirement obligations and accrued environmental costs [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Deferred income tax assets	376	387
Deferred income tax expense recognized in net earning	20	25
Tax loss and other carryforwards [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Deferred income tax assets	370	270
Deferred income tax expense recognized in net earning	(98)	(9)
Pension and other post-retirement benefits liabilities [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Deferred income tax assets	161	168
Deferred income tax expense recognized in net earning	(12)	(14)
Long term debt [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Deferred income tax assets	102	107
Deferred income tax expense recognized in net earning	3	3
Lease Liabilities [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Deferred income tax assets	201	227
Deferred income tax expense recognized in net earning	26	55
Receivables [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Deferred income tax assets	50	51
Deferred income tax expense recognized in net earning	2	7
Inventories [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Deferred income tax assets	37	59
Deferred income tax expense recognized in net earning	20	(5)
Payables and accrued charges [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Deferred income tax assets	0	25
Deferred income tax liabilities	72	0
Deferred income tax expense recognized in net earning	25	(5)
Payables and accrued charges [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Deferred income tax expense recognized in net earning	72	0
Other assets [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Deferred income tax assets	12	22
Deferred income tax expense recognized in net earning	17	14
Property plant and equipment [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Deferred income tax liabilities	3,637	3,647
Deferred income tax expense recognized in net earning	(12)	147
Goodwill and other intangible assets [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Deferred income tax liabilities	471	523
Deferred income tax expense recognized in net earning	(67)	(58)
Other liabilities [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Deferred income tax liabilities	36	42
Deferred income tax expense recognized in net earning	$ (5)	$ 17

Income Taxes - Summary of Recon

Income Taxes - Summary of Reconciliation of Net Deferred Income Tax Liabilities (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Reconciliation of changes in deferred tax liability (asset) [abstract]
Balance, beginning of year	$ 2,896	$ 2,691
Business acquisitions (Note 25)	0	29
Deferred income tax expense recognized in net earning	(9)	177
Income tax charge recognized in OCI	17	2
Other	3	(3)
Balance, end of year	$ 2,907	$ 2,896

Income Taxes - Summary of Amoun

Income Taxes - Summary of Amounts and Expiry Dates of Unused Tax Losses and Unused Tax Credits (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2020USD ($)
Unused operating losses [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Amount	$ 1,425
Expiry Date	2021 – Indefinite
Unused capital losses [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Amount	$ 583
Expiry Date	Indefinite
Unused investment tax credits [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Amount	$ 23
Expiry Date	2021 – 2040

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Disclosure of income taxes [abstract]
Tax losses and deductible temporary differences for which no deferred tax assets recognized	$ 735
Temporary differences associated with investments in subsidiaries and equity-accounted investees, for which deferred tax liabilities have not been recognized	8,911	$ 9,183
Net decrease in unrecognized deferred tax assets	$ 20

Net Earnings per Share - Summar

Net Earnings per Share - Summary of Net Earnings per Share (Detail) - shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Earnings per share [abstract]
WEIGHTED AVERAGE NUMBER OF COMMON SHARES	569,657,000	582,269,000
Dilutive effect of stock options	29,000	777,000
Dilutive effect of share-settled performance share units ("PSUs")	0	56,000
Weighted average number of diluted common shares	569,686,000	583,102,000

Net Earnings per Share - Summ_2

Net Earnings per Share - Summary of Options Excluded from Calculation of Diluted Net Earnings per Share (Detail) - shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Earnings per share [Line Items]
Number of options excluded	9,875,797	4,539,529
Performance option plan years fully excluded [Member]
Earnings per share [Line Items]
Option plan years fully excluded	2011 – 2017	2010 – 2015
Stock option plan years fully excluded [Member]
Earnings per share [Line Items]
Option plan years fully excluded	2015, 2017 – 2020	2015, 2019

Financial Instruments and Rel_3

Financial Instruments and Related Risk Management - Summary of Maximum Exposure to Credit Risk (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Disclosure of credit risk exposure [Line Items]
Maximum Exposure To Credit Risk	$ 4,997	$ 4,114
Cash and cash equivalents [Member]
Disclosure of credit risk exposure [Line Items]
Maximum Exposure To Credit Risk	1,454	671
Receivables from Customers[Member]
Disclosure of credit risk exposure [Line Items]
Maximum Exposure To Credit Risk	3,498	3,438
Other current assets - derivatives [Member]
Disclosure of credit risk exposure [Line Items]
Maximum Exposure To Credit Risk	$ 45	$ 5

Financial Instruments and Rel_4

Financial Instruments and Related Risk Management - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Foreign Currency Derivatives [Member]
Disclosure of detailed information about financial instruments [Line Items]
Fair value net FX currency derivative assets	$ 14	$ 2
Interest Rate Contracts [Member]
Disclosure of detailed information about financial instruments [Line Items]
Notional amount, cash flow hedges on our interest rate derivative contracts	$ 680
Industrial and Feed Customers [Member]
Disclosure of detailed information about financial instruments [Line Items]
Credit period	30 days
Commodity price risk [Member]
Disclosure of detailed information about financial instruments [Line Items]
Maximum period for fixed price natural gas hedges	10 years
Bottom of range [Member] \| Wholesale Fertilizer Customers [Member]
Disclosure of detailed information about financial instruments [Line Items]
Credit period	15 days
Bottom of range [Member] \| Retail Customer [Member]
Disclosure of detailed information about financial instruments [Line Items]
Credit period	30 days
Bottom of range [Member] \| Customer [Member]
Disclosure of detailed information about financial instruments [Line Items]
Credit review frequency period	12 months
Top of range [Member] \| Wholesale Fertilizer Customers [Member]
Disclosure of detailed information about financial instruments [Line Items]
Credit period	30 days
Top of range [Member] \| Export Sales Customers [Member]
Disclosure of detailed information about financial instruments [Line Items]
Credit period	180 days
Top of range [Member] \| Retail Customer [Member]
Disclosure of detailed information about financial instruments [Line Items]
Credit period	360 days
Top of range [Member] \| Customer [Member]
Disclosure of detailed information about financial instruments [Line Items]
Credit review frequency period	24 months
Current Range [Member] \| Third Parties Potash Nitrogen Phosphate [Member] \| Receivables from Customers[Member] \| Potash, Nitrogen, Phosphate, Segment [Member]
Disclosure of detailed information about financial instruments [Line Items]
Ageing Of Receivables	92.00%
Current Range [Member] \| Third Parties - Retail [Member] \| Receivables from Customers[Member] \| Retail [Member]
Disclosure of detailed information about financial instruments [Line Items]
Ageing Of Receivables	76.00%
Current Range [Member] \| Nutrien Financial [Member]
Disclosure of detailed information about financial instruments [Line Items]
Ageing Of Receivables	81.00%
30 days or less past due [Member] \| Potash, Nitrogen, Phosphate, Segment [Member]
Disclosure of detailed information about financial instruments [Line Items]
Ageing Of Receivables	8.00%
30 days or less past due [Member] \| Third Parties - Retail [Member] \| Receivables from Customers[Member] \| Retail [Member]
Disclosure of detailed information about financial instruments [Line Items]
Ageing Of Receivables	15.00%
30 days or less past due [Member] \| Nutrien Financial [Member] \| Receivables from Customers[Member]
Disclosure of detailed information about financial instruments [Line Items]
Ageing Of Receivables	9.00%
31 - 90 days past due [Member] \| Receivables from Customers[Member] \| Retail [Member]
Disclosure of detailed information about financial instruments [Line Items]
Ageing Of Receivables	4.00%
31 - 90 days past due [Member] \| Nutrien Financial [Member]
Disclosure of detailed information about financial instruments [Line Items]
Ageing Of Receivables	4.00%
Greater than 90 days past due [Member] \| Receivables from Customers[Member] \| Retail [Member]
Disclosure of detailed information about financial instruments [Line Items]
Ageing Of Receivables	5.00%
Greater than 90 days past due [Member] \| Nutrien Financial [Member]
Disclosure of detailed information about financial instruments [Line Items]
Ageing Of Receivables	6.00%

Financial Instruments and Rel_5

Financial Instruments and Related Risk Management - Summary of Maturity Analysis of Financial Liabilities and Gross Settled Derivative Contracts (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Disclosure of maturity analysis for derivative financial liabilities [Line Items]
Short-term debt	$ 159	$ 976
Payables and accrued charges	8,058	7,437
Long-term debt, including current portion	9,742	$ 8,708
Carrying amount [Member]
Disclosure of maturity analysis for derivative financial liabilities [Line Items]
Short-term debt	159
Payables and accrued charges	5,781
Long-term debt, including current portion	10,061
Lease liabilities, including current portion	1,140
Derivatives	48
Carrying amount of liability	17,189
Gross Carrying amount [Member]
Disclosure of maturity analysis for derivative financial liabilities [Line Items]
Payables and accrued charges	5,781
Lease liabilities, including current portion	1,305
Carrying amount of liability	23,088
Short-term debt, contractual cash flows	159
Current portion of long-term debt and Long-term debt, contractual cash flows	15,795
Derivatives	48
Not later than one year [Member]
Disclosure of maturity analysis for derivative financial liabilities [Line Items]
Payables and accrued charges	5,781
Not later than one year [Member] \| Gross Carrying amount [Member]
Disclosure of maturity analysis for derivative financial liabilities [Line Items]
Lease liabilities, including current portion	281
Carrying amount of liability	6,694
Short-term debt, contractual cash flows	159
Current portion of long-term debt and Long-term debt, contractual cash flows	434
Derivatives	39
Later than one year and not later than three years [Member]
Disclosure of maturity analysis for derivative financial liabilities [Line Items]
Payables and accrued charges	0
Later than one year and not later than three years [Member] \| Gross Carrying amount [Member]
Disclosure of maturity analysis for derivative financial liabilities [Line Items]
Lease liabilities, including current portion	408
Carrying amount of liability	2,795
Short-term debt, contractual cash flows	0
Current portion of long-term debt and Long-term debt, contractual cash flows	2,378
Derivatives	9
Later than three years and not later than five years [Member]
Disclosure of maturity analysis for derivative financial liabilities [Line Items]
Payables and accrued charges	0
Later than three years and not later than five years [Member] \| Gross Carrying amount [Member]
Disclosure of maturity analysis for derivative financial liabilities [Line Items]
Lease liabilities, including current portion	233
Carrying amount of liability	2,731
Short-term debt, contractual cash flows	0
Current portion of long-term debt and Long-term debt, contractual cash flows	2,498
Derivatives	0
Over 5 years [Member]
Disclosure of maturity analysis for derivative financial liabilities [Line Items]
Payables and accrued charges	0
Over 5 years [Member] \| Gross Carrying amount [Member]
Disclosure of maturity analysis for derivative financial liabilities [Line Items]
Lease liabilities, including current portion	383
Carrying amount of liability	10,868
Short-term debt, contractual cash flows	0
Current portion of long-term debt and Long-term debt, contractual cash flows	10,485
Derivatives	$ 0

Financial Instruments and Rel_6

Financial Instruments and Related Risk Management - Summary of Significant Foreign Currency Derivatives (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2020USD ($)$ / $$ / $$ / $$ / $MMBTU	Dec. 31, 2019USD ($)$ / $$ / $$ / $$ / $MMBTU
NYMEX swaps [Member]
Disclosure Of Derivative Contract Outstanding [Line Items]
Notional Amount in MMBtu \| MMBTU	14	16
Fair value of Assets (Liabilities) \| $	$ (18)	$ (30)
Forwards USD/CAD [Member]
Disclosure Of Derivative Contract Outstanding [Line Items]
Notional \| $		$ 337
Average Contract Rate	1.2796
Forwards USD/CAD [Member] \| Derivatives Not Designated As Hedges [Member]
Disclosure Of Derivative Contract Outstanding [Line Items]
Notional \| $	$ 514
Average Contract Rate		1.3096
Forwards USD/CAD [Member] \| Derivatives Designated As Hedges [Member]
Disclosure Of Derivative Contract Outstanding [Line Items]
Notional \| $	$ 254	$ 0
Average Contract Rate	1.319	0
Forwards CAD/USD [Member]
Disclosure Of Derivative Contract Outstanding [Line Items]
Notional \| $		$ 120
Average Contract Rate	1.2804
Forwards CAD/USD [Member] \| Derivatives Not Designated As Hedges [Member]
Disclosure Of Derivative Contract Outstanding [Line Items]
Notional \| $	$ 126
Average Contract Rate		1.3138
Forwards USD/AUD [Member]
Disclosure Of Derivative Contract Outstanding [Line Items]
Notional \| $		$ 78
Average Contract Rate	1.3661
Forwards USD/AUD [Member] \| Derivatives Not Designated As Hedges [Member]
Disclosure Of Derivative Contract Outstanding [Line Items]
Notional \| $	$ 28
Average Contract Rate		1.4593
Forwards AUD/USD [Member] \| Derivatives Not Designated As Hedges [Member]
Disclosure Of Derivative Contract Outstanding [Line Items]
Notional \| $	$ 92	$ 47
Average Contract Rate	1.364	1.4563
Options USD/CAD - buy USD puts [Member]
Disclosure Of Derivative Contract Outstanding [Line Items]
Average Contract Rate	1.3147
Options USD/CAD - buy USD puts [Member] \| Derivatives Not Designated As Hedges [Member]
Disclosure Of Derivative Contract Outstanding [Line Items]
Notional \| $	$ 70	$ 0
Average Contract Rate		0
Options CAD/USD - sell USD calls [Member]
Disclosure Of Derivative Contract Outstanding [Line Items]
Average Contract Rate	1.3665
Options CAD/USD - sell USD calls [Member] \| Derivatives Not Designated As Hedges [Member]
Disclosure Of Derivative Contract Outstanding [Line Items]
Notional \| $	$ 55	$ 0
Average Contract Rate		0
Options AUD/USD - buy USD calls [Member]
Disclosure Of Derivative Contract Outstanding [Line Items]
Average Contract Rate	1.3216
Options AUD/USD - buy USD calls [Member] \| Derivatives Not Designated As Hedges [Member]
Disclosure Of Derivative Contract Outstanding [Line Items]
Notional \| $	$ 61	$ 0
Average Contract Rate		0

Financial Instruments and Rel_7

Financial Instruments and Related Risk Management - Summary of Maturity Analysis of Financial Liabilities and Gross Settled Derivative Contracts (Parenthetical) (Detail) $ in Millions	Dec. 31, 2020USD ($)
Disclosure of maturity analysis for derivative financial liabilities [abstract]
Payable and accrued charges, excludes non-financial liabilities and includes trade payables	$ 1,500

Financial Instruments and Rel_8

Financial Instruments and Related Risk Management - Summary of Fair Value Hierarchy for Financial Assets and Financial Liabilities (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of fair value measurement of assets and liability [Line Items]
Cash and cash equivalents	$ 1,454	$ 671	$ 2,314
Investment at FVTOCI (Note 15)	153	161
Notes and debentures	14	502
Long-term debt (Note 18)	10,047	8,553
Recurring fair value measurement [Member]
Disclosure of fair value measurement of assets and liability [Line Items]
Cash and cash equivalents	1,454	671
Derivative instrument assets	45	5
Investment at FVTOCI (Note 15)	153	161
Recurring fair value measurement [Member] \| Derivative Instruments Liabilities [Member]
Disclosure of fair value measurement of assets and liability [Line Items]
Derivative instrument liabilities	(48)	(33)
Marketable Securities [Member] \| Recurring fair value measurement [Member]
Disclosure of fair value measurement of assets and liability [Line Items]
Other current financial assets-marketable securities	161	193
Notes and Debentures Current Portion [Member] \| Financial liabilities at amortised cost, class [Member]
Disclosure of fair value measurement of assets and liability [Line Items]
Notes and debentures	0	(494)
Fixed And Floating Rate Debt Current Portion [Member] \| Financial liabilities at amortised cost, class [Member]
Disclosure of fair value measurement of assets and liability [Line Items]
Notes and debentures	(14)
Fixed and floating rate debt		(8)
Notes and Debentures Long Term Debt [Member] \| Financial liabilities at amortised cost, class [Member]
Disclosure of fair value measurement of assets and liability [Line Items]
Long-term debt (Note 18)	(9,994)
Fixed and floating rate debt		(8,528)
Fixed and Floating Rate Debt Long Term Debt [Member] \| Financial liabilities at amortised cost, class [Member]
Disclosure of fair value measurement of assets and liability [Line Items]
Long-term debt (Note 18)	(53)
Fixed and floating rate debt		(25)
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Disclosure of fair value measurement of assets and liability [Line Items]
Cash and cash equivalents	0	0
Derivative instrument assets	0	0
Investment at FVTOCI (Note 15)	153	161
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Derivative Instruments Liabilities [Member]
Disclosure of fair value measurement of assets and liability [Line Items]
Derivative instrument liabilities	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Marketable Securities [Member]
Disclosure of fair value measurement of assets and liability [Line Items]
Other current financial assets-marketable securities	24	27
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Notes and Debentures Current Portion [Member] \| Financial liabilities at amortised cost, class [Member]
Disclosure of fair value measurement of assets and liability [Line Items]
Notes and debentures	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Fixed And Floating Rate Debt Current Portion [Member] \| Financial liabilities at amortised cost, class [Member]
Disclosure of fair value measurement of assets and liability [Line Items]
Fixed and floating rate debt	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Notes and Debentures Long Term Debt [Member] \| Financial liabilities at amortised cost, class [Member]
Disclosure of fair value measurement of assets and liability [Line Items]
Notes and debentures	(3,801)	(1,726)
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Fixed and Floating Rate Debt Long Term Debt [Member] \| Financial liabilities at amortised cost, class [Member]
Disclosure of fair value measurement of assets and liability [Line Items]
Fixed and floating rate debt	0	0
Level 2 of fair value hierarchy [Member]
Disclosure of fair value measurement of assets and liability [Line Items]
Cash and cash equivalents		671
Derivative instrument assets	45	5
Investment at FVTOCI (Note 15)	0	0
Level 2 of fair value hierarchy [Member] \| Derivative Instruments Liabilities [Member]
Disclosure of fair value measurement of assets and liability [Line Items]
Derivative instrument liabilities	(48)	(33)
Level 2 of fair value hierarchy [Member] \| Marketable Securities [Member]
Disclosure of fair value measurement of assets and liability [Line Items]
Other current financial assets-marketable securities		166
Level 2 of fair value hierarchy [Member] \| Marketable Securities [Member] \| Recurring fair value measurement [Member]
Disclosure of fair value measurement of assets and liability [Line Items]
Other current financial assets-marketable securities	137
Level 2 of fair value hierarchy [Member] \| Financial assets at amortised cost, class [Member] \| Recurring fair value measurement [Member]
Disclosure of fair value measurement of assets and liability [Line Items]
Cash and cash equivalents	1,454
Level 2 of fair value hierarchy [Member] \| Notes and Debentures Current Portion [Member] \| Financial liabilities at amortised cost, class [Member]
Disclosure of fair value measurement of assets and liability [Line Items]
Notes and debentures	0	(503)
Level 2 of fair value hierarchy [Member] \| Fixed And Floating Rate Debt Current Portion [Member] \| Financial liabilities at amortised cost, class [Member]
Disclosure of fair value measurement of assets and liability [Line Items]
Fixed and floating rate debt	(14)	(8)
Level 2 of fair value hierarchy [Member] \| Notes and Debentures Long Term Debt [Member] \| Financial liabilities at amortised cost, class [Member]
Disclosure of fair value measurement of assets and liability [Line Items]
Notes and debentures	(7,955)	(7,440)
Level 2 of fair value hierarchy [Member] \| Fixed and Floating Rate Debt Long Term Debt [Member] \| Financial liabilities at amortised cost, class [Member]
Disclosure of fair value measurement of assets and liability [Line Items]
Fixed and floating rate debt	$ (53)	$ (25)

Financial Instruments and Rel_9

Financial Instruments and Related Risk Management - Summary of Fair Value Hierarchy for Financial Assets and Financial Liabilities (Parenthetical) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of financial liabilities [abstract]
Transfers between Level 1 and Level 2, assets	$ 0	$ 0
Transfers between Level 1 and Level 2, liabilities	$ 0	$ 0

Financial Instruments and Re_10

Financial Instruments and Related Risk Management - Summary of Recognized Financial Instruments that are Offset, or Subject to Enforceable Master Netting Arrangements (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Disclosure Of Derivative Financial Asset And Liabilities Offsetting Arrangements [Line Items]
Financial assets (liabilities), Gross	$ (168)	$ (180)
Financial assets (liabilities), Offset	150	150
Financial assets (liabilities), Net Amount Presented	(18)	(30)
Natural gas derivative liabilities [Member]
Disclosure Of Derivative Financial Asset And Liabilities Offsetting Arrangements [Line Items]
Financial assets (liabilities), Gross	(18)	(30)
Financial assets (liabilities), Offset	0	0
Financial assets (liabilities), Net Amount Presented	(18)	(30)
Other Long Term Debt [Member]
Disclosure Of Derivative Financial Asset And Liabilities Offsetting Arrangements [Line Items]
Financial assets (liabilities), Gross	(150)	(150)
Financial assets (liabilities), Offset	150	150
Financial assets (liabilities), Net Amount Presented	$ 0	$ 0

Financial Instruments and Re_11

Financial Instruments and Related Risk Management - Summary of Recognized Financial Instruments that are Offset, or Subject to Enforceable Master Netting Arrangements (Parenthetical) (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Natural gas derivative liabilities [Member]
Disclosure Of Derivative Financial Asset And Liabilities Offsetting Arrangements [Line Items]
Cash margin deposits	$ 9	$ 17

Financial Instruments and Re_12

Financial Instruments and Related Risk Management - Summary of Natural Gas Derivatives Outstanding (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2020USD ($)$ / MMBTUMMBTU	Dec. 31, 2019USD ($)$ / MMBTUMMBTU
NYMEX swaps [Member]
Disclosure Of Derivative Contract Outstanding [Line Items]
Notional Amount in MMBtu \| MMBTU	14	16
Average contract price \| $ / MMBTU	3.89	4.26
Fair value of Assets (Liabilities)	$ (18)	$ (30)
NYMEX swaps [Member] \| Bottom of range [Member]
Disclosure Of Derivative Contract Outstanding [Line Items]
Maturities	2021	2020
NYMEX swaps [Member] \| Top of range [Member]
Disclosure Of Derivative Contract Outstanding [Line Items]
Maturities	2022	2022
Forwards Usd Cad [Member]
Disclosure Of Derivative Contract Outstanding [Line Items]
Notional		$ 337
Maturities		2020
Forwards Usd Cad [Member] \| Bottom of range [Member]
Disclosure Of Derivative Contract Outstanding [Line Items]
Maturities	2021	2020
Forwards Usd Cad [Member] \| Top of range [Member]
Disclosure Of Derivative Contract Outstanding [Line Items]
Maturities	0	0
Forwards Usd Cad [Member] \| Derivatives Not Designated As Hedges [Member]
Disclosure Of Derivative Contract Outstanding [Line Items]
Notional	$ 514
Maturities	2021
Forwards Usd Cad [Member] \| Derivatives Designated As Hedges [Member]
Disclosure Of Derivative Contract Outstanding [Line Items]
Notional	$ 254	$ 0
Maturities	2021	0
Forwards Cad Usd [Member]
Disclosure Of Derivative Contract Outstanding [Line Items]
Notional		$ 120
Maturities		2020
Forwards Cad Usd [Member] \| Bottom of range [Member]
Disclosure Of Derivative Contract Outstanding [Line Items]
Maturities	2021	2020
Forwards Cad Usd [Member] \| Top of range [Member]
Disclosure Of Derivative Contract Outstanding [Line Items]
Maturities	0	0
Forwards Cad Usd [Member] \| Derivatives Not Designated As Hedges [Member]
Disclosure Of Derivative Contract Outstanding [Line Items]
Notional	$ 126
Maturities	2021
Forwards Usd Aud [Member]
Disclosure Of Derivative Contract Outstanding [Line Items]
Notional		$ 78
Maturities		2020
Forwards Usd Aud [Member] \| Bottom of range [Member]
Disclosure Of Derivative Contract Outstanding [Line Items]
Maturities	2021	2020
Forwards Usd Aud [Member] \| Top of range [Member]
Disclosure Of Derivative Contract Outstanding [Line Items]
Maturities	0	0
Forwards Usd Aud [Member] \| Derivatives Not Designated As Hedges [Member]
Disclosure Of Derivative Contract Outstanding [Line Items]
Notional	$ 28
Maturities	2021
Forwards Aud Usd [Member] \| Bottom of range [Member]
Disclosure Of Derivative Contract Outstanding [Line Items]
Maturities	2021	2020
Forwards Aud Usd [Member] \| Top of range [Member]
Disclosure Of Derivative Contract Outstanding [Line Items]
Maturities	0	0
Forwards Aud Usd [Member] \| Derivatives Not Designated As Hedges [Member]
Disclosure Of Derivative Contract Outstanding [Line Items]
Notional	$ 92	$ 47
Maturities	2021	2020
Options USD/CAD - buy USD puts [Member]
Disclosure Of Derivative Contract Outstanding [Line Items]
Maturities		0
Options USD/CAD - buy USD puts [Member] \| Derivatives Not Designated As Hedges [Member]
Disclosure Of Derivative Contract Outstanding [Line Items]
Notional	$ 70	$ 0
Maturities	2021
Options CAD/USD - sell USD calls [Member]
Disclosure Of Derivative Contract Outstanding [Line Items]
Maturities		0
Options CAD/USD - sell USD calls [Member] \| Derivatives Not Designated As Hedges [Member]
Disclosure Of Derivative Contract Outstanding [Line Items]
Notional	$ 55	$ 0
Maturities	2021
Options AUD/USD - buy USD calls [Member]
Disclosure Of Derivative Contract Outstanding [Line Items]
Maturities		0
Options AUD/USD - buy USD calls [Member] \| Derivatives Not Designated As Hedges [Member]
Disclosure Of Derivative Contract Outstanding [Line Items]
Notional	$ 61	$ 0
Maturities	2021

Receivables - Summary of Receiv

Receivables - Summary of Receivables (Detail) - USD ($)	12 Months Ended
Receivables - Summary of Receivables (Detail) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Trade and other current receivables [abstract]
Less allowance for expected credit losses of receivables from customers	$ (69,000,000)	$ (83,000,000)
Receivables from customers	3,019,000,000	3,047,000,000
Rebates	256,000,000	190,000,000
Income taxes (Note 8)	83,000,000	104,000,000
Other receivables	223,000,000	201,000,000
Receivables	$ 3,581,000,000	$ 3,542,000,000
Maximum percentage of qualified customer loans covered for bad debts Indemnification agreement	5.00%	5.00%
Outstanding customer credit with financial institution	$ 444
Risk of default very low [Member]
Trade and other current receivables [abstract]
Default risk of current trade and other receivables	1,147,000,000	$ 762,000,000
Risk of default low [Member]
Trade and other current receivables [abstract]
Default risk of current trade and other receivables	270,000,000	64,000,000
Receivables from Customers[Member] \| Third parties financed by Nutrien Financial [Member]
Trade and other current receivables [abstract]
Receivables from customers	1,417,000,000	826,000,000
Receivables from Customers[Member] \| Third Parties Potash Nitrogen Phosphate [Member]
Trade and other current receivables [abstract]
Receivables from customers	391,000,000	428,000,000
Receivables from Customers[Member] \| Related Party - Canpotex [Member]
Trade and other current receivables [abstract]
Receivables from customers	122,000,000	194,000,000
Receivables from Customers[Member] \| Third Parties - Retail [Member]
Trade and other current receivables [abstract]
Receivables from customers	$ 1,158,000,000	$ 1,682,000,000

Inventories - Summary of Invent

Inventories - Summary of Inventories (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Classes of current inventories [abstract]
Purchased for resale	$ 3,655	$ 3,592
Finished products	384	524
Intermediate products	227	244
Raw materials	215	205
Materials and supplies	449	410
Inventories	$ 4,930	$ 4,975

Inventories - Additional Inform

Inventories - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Classes of inventories [Line Items]
Cost of goods sold (Note 4)	$ 14,814	$ 13,814
Biological Assets	7	33
Inventories	4,930	4,975
Other Aquisitions [Member]
Classes of inventories [Line Items]
Inventories	63	145
Retail [Member]
Classes of inventories [Line Items]
Inventories	3,832	3,772
Potash [Member]
Classes of inventories [Line Items]
Cost of goods sold (Note 4)	1,183	1,103
Inventories	280	275
Nitrogen [Member]
Classes of inventories [Line Items]
Cost of goods sold (Note 4)	2,265	2,148
Inventories	417	482
Phosphate [Member]
Classes of inventories [Line Items]
Cost of goods sold (Note 4)	1,166	1,373
Inventories	401	446
Inventories [Member]
Classes of inventories [Line Items]
Cost of goods sold (Note 4)	$ 14,347	$ 13,465

Property, Plant and Equipment -

Property, Plant and Equipment - Summary of Estimated Useful Lives (Detail)	12 Months Ended
	Dec. 31, 2020
Bottom of range [Member] \| Land Improvements [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Useful Life Range (years)	2 years
Bottom of range [Member] \| Buildings and Improvements [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Useful Life Range (years)	1 year
Bottom of range [Member] \| Machinery And Equipment [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Useful Life Range (years)	1 year
Bottom of range [Member] \| Mine development costs [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Useful Life Range (years)	2 years
Top of range [Member] \| Land Improvements [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Useful Life Range (years)	80 years
Top of range [Member] \| Buildings and Improvements [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Useful Life Range (years)	60 years
Top of range [Member] \| Machinery And Equipment [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Useful Life Range (years)	80 years
Top of range [Member] \| Mine development costs [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Useful Life Range (years)	60 years

Property, Plant and Equipment_2

Property, Plant and Equipment - Summary of Reconciliation of Changes in Property Plant and Equipment (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of detailed information about property, plant and equipment [Line Items]
Beginning balance	$ 20,335	$ 18,796
Property, plant and equipment - ROU assets - IFRS Adjustment	1,019	1,055	$ 1,059
Acquisitions (Note 25)	77	251
Additions	1,418	1,756
Additions - ROU	323	199
Disposals	(48)	(92)
Transfers	0	0
Foreign currency translation and other	35	(44)
Depreciation	(1,379)	(1,304)
Depreciation - ROU	(279)	(234)
Impairment	(824)	(120)
Ending balance	19,660	20,335
Owned [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Beginning balance	19,280
Ending balance	18,641	19,280
Carrying amount [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Beginning balance	31,675
Ending balance	33,122	31,675
Accumulated depreciation and amortisation [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Beginning balance	(11,340)
Ending balance	(13,462)	(11,340)
Land And Improvements [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Beginning balance	1,160	1,018
Property, plant and equipment - ROU assets - IFRS Adjustment	29	43	48
Acquisitions (Note 25)	8	17
Additions	25	14
Additions - ROU	0	0
Disposals	(5)	(3)
Transfers	46	108
Foreign currency translation and other	(15)	(4)
Depreciation	(39)	(36)
Depreciation - ROU	(2)	(2)
Impairment	(88)	0
Ending balance	1,090	1,160
Land And Improvements [Member] \| Owned [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Beginning balance	1,117
Ending balance	1,061	1,117
Land And Improvements [Member] \| Carrying amount [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Beginning balance	1,474
Ending balance	1,530	1,474
Land And Improvements [Member] \| Accumulated depreciation and amortisation [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Beginning balance	(314)
Ending balance	(440)	(314)
Buildings and Improvements [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Beginning balance	6,409	6,044
Property, plant and equipment - ROU assets - IFRS Adjustment	319	344	307
Acquisitions (Note 25)	27	136
Additions	91	30
Additions - ROU	24	22
Disposals	(9)	(5)
Transfers	58	145
Foreign currency translation and other	0	(37)
Depreciation	(198)	(187)
Depreciation - ROU	(55)	(46)
Impairment	(42)	0
Ending balance	6,305	6,409
Buildings and Improvements [Member] \| Owned [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Beginning balance	6,065
Ending balance	5,986	6,065
Buildings and Improvements [Member] \| Carrying amount [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Beginning balance	8,207
Ending balance	8,377	8,207
Buildings and Improvements [Member] \| Accumulated depreciation and amortisation [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Beginning balance	(1,798)
Ending balance	(2,072)	(1,798)
Machinery And Equipment [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Beginning balance	10,641	9,882
Property, plant and equipment - ROU assets - IFRS Adjustment	671	668	704
Acquisitions (Note 25)	42	61
Additions	224	225
Additions - ROU	299	177
Disposals	(34)	(84)
Transfers	923	932
Foreign currency translation and other	30	(14)
Depreciation	(1,060)	(1,004)
Depreciation - ROU	(222)	(186)
Impairment	(507)	(52)
Ending balance	10,336	10,641
Machinery And Equipment [Member] \| Owned [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Beginning balance	9,973
Ending balance	9,665	9,973
Machinery And Equipment [Member] \| Carrying amount [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Beginning balance	18,548
Ending balance	19,730	18,548
Machinery And Equipment [Member] \| Accumulated depreciation and amortisation [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Beginning balance	(7,907)
Ending balance	(9,394)	(7,907)
Mine development costs [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Beginning balance	747	709
Property, plant and equipment - ROU assets - IFRS Adjustment	0	0	0
Acquisitions (Note 25)	0	0
Additions	1	0
Additions - ROU	0	0
Disposals	0	0
Transfers	164	110
Foreign currency translation and other	30	5
Depreciation	(82)	(77)
Depreciation - ROU	0	0
Impairment	(137)	0
Ending balance	723	747
Mine development costs [Member] \| Owned [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Beginning balance	747
Ending balance	723	747
Mine development costs [Member] \| Carrying amount [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Beginning balance	2,068
Ending balance	2,279	2,068
Mine development costs [Member] \| Accumulated depreciation and amortisation [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Beginning balance	(1,321)
Ending balance	(1,556)	(1,321)
Assets Under Construction [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Beginning balance	1,378	1,143
Property, plant and equipment - ROU assets - IFRS Adjustment	0	0	$ 0
Acquisitions (Note 25)	0	37
Additions	1,077	1,487
Additions - ROU	0	0
Disposals	0	0
Transfers	(1,191)	(1,295)
Foreign currency translation and other	(10)	6
Depreciation	0
Depreciation - ROU	0	0
Impairment	(48)	0
Ending balance	1,206	1,378
Assets Under Construction [Member] \| Owned [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Beginning balance	1,378
Ending balance	1,206	1,378
Assets Under Construction [Member] \| Carrying amount [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Beginning balance	1,378
Ending balance	1,206	1,378
Assets Under Construction [Member] \| Accumulated depreciation and amortisation [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Beginning balance	0
Ending balance	$ 0	$ 0

Property, Plant and Equipment_3

Property, Plant and Equipment - Summary of Depreciation of Property Plant and Equipment (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of detailed information about property, plant and equipment [Line Items]
Depreciation, property, plant and equipment	$ 1,379	$ 1,304
Freight Transportation and Distribution [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Depreciation, property, plant and equipment	138	137
Cost of Goods Sold [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Depreciation, property, plant and equipment	1,111	1,008
Selling Expenses [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Depreciation, property, plant and equipment	393	344
General And Administrative Expense1 [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Depreciation, property, plant and equipment	56	40
Depreciation Expense Included in Income Statement [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Depreciation, property, plant and equipment	1,698	1,529
Inventory [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Depreciation, property, plant and equipment	$ 132	$ 161

Property Plant And Equipment -

Property Plant And Equipment - Summary Of Impairment (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure Of Property Plant And Equipment Impairment [Line Items]
Impairment indicator	Lower long-term forecasted global phosphate prices
Pre-tax impairment loss	$ (824,000,000)	$ (120,000,000)
Trinidad [Member]
Disclosure Of Property Plant And Equipment Impairment [Line Items]
Net selling price (5-year average)	(4.00%)
Production volumes (5-year average)	(5.00%)
Discount rate (post-tax)	0.90%
Post-Tax [Member] \| Trinidad [Member]
Disclosure Of Property Plant And Equipment Impairment [Line Items]
Discount Rate, 1.0 percentage point change	12.60%
Terminal Growth Rate	2.00%
White Springs [Member]
Disclosure Of Property Plant And Equipment Impairment [Line Items]
Pre-tax impairment loss	$ 215,000,000
Key assumptions	Value in use ("VIU")
End of mine life (proven and probable reserves) (year)	2029
White Springs [Member] \| Post-Tax [Member]
Disclosure Of Property Plant And Equipment Impairment [Line Items]
After tax discount rate	12.00%
White Springs [Member] \| Pre-Tax [Member]
Disclosure Of Property Plant And Equipment Impairment [Line Items]
Recoverable amount ($)	$ 160,000,000
Discount rate (%)	16.00%
Aurora [Member]
Disclosure Of Property Plant And Equipment Impairment [Line Items]
Pre-tax impairment loss	$ 545,000,000
Key assumptions	FVLCD a Level 3 measurement
End of mine life (proven and probable reserves) (year)	2050
Net selling price, $10 per tonne change	$ 10
Discount Rate, 1.0 percentage point change	1.00%
Net selling price, $10 per tonne change	$ 150
Discount rate, 1.0 percentage point change	120
Aurora [Member] \| Post-Tax [Member]
Disclosure Of Property Plant And Equipment Impairment [Line Items]
Recoverable amount ($)	$ 995,000,000
After tax discount rate	10.50%
Potash [Member]
Disclosure Of Property Plant And Equipment Impairment [Line Items]
Pre-tax impairment loss	$ (23,000,000)	0
Phosphate [Member]
Disclosure Of Property Plant And Equipment Impairment [Line Items]
Segment	Phosphate
Pre-tax impairment loss	$ (769,000,000)	$ 0

Property, Plant and Equipment_4

Property, Plant and Equipment - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of detailed information about property, plant and equipment [Line Items]
Impairment of assets (Note 13)	$ (824)	$ (120)
Impairment losses related to other non-current assets	$ 64	$ 52
Land Improvements [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Classes of PPE	6.00%	6.00%
Buildings and Improvements [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Impairment of assets (Note 13)	$ (42)	$ 0
Classes of PPE	32.00%	32.00%
Machinery And Equipment [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Impairment of assets (Note 13)	$ (507)	$ (52)
Classes of PPE	52.00%	51.00%
Mine development costs [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Impairment of assets (Note 13)	$ (137)	$ 0
Classes of PPE	4.00%	4.00%
Assets Under Construction [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Impairment of assets (Note 13)	$ (48)	$ 0
Classes of PPE	6.00%	7.00%
White Springs [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Impairment of assets (Note 13)	$ 215
Potash [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Impairment of assets (Note 13)	(23)	$ 0
Phosphate [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Impairment of assets (Note 13)	$ (769)	$ 0

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets - Estimated Useful Lives Applied to Finite-Lived Intangible Assets (Detail)	12 Months Ended
	Dec. 31, 2020
Bottom of range [Member] \| Customer relationships [Member]
Disclosure of detailed information about intangible assets [Line Items]
Estimated useful lives	3 years
Bottom of range [Member] \| Technology [Member]
Disclosure of detailed information about intangible assets [Line Items]
Estimated useful lives	3 years
Bottom of range [Member] \| Trade names [Member]
Disclosure of detailed information about intangible assets [Line Items]
Estimated useful lives	1 year
Bottom of range [Member] \| Other [Member]
Disclosure of detailed information about intangible assets [Line Items]
Estimated useful lives	1 year
Top of range [Member] \| Customer relationships [Member]
Disclosure of detailed information about intangible assets [Line Items]
Estimated useful lives	15 years
Top of range [Member] \| Technology [Member]
Disclosure of detailed information about intangible assets [Line Items]
Estimated useful lives	30 years
Top of range [Member] \| Trade names [Member]
Disclosure of detailed information about intangible assets [Line Items]
Estimated useful lives	20 years
Top of range [Member] \| Other [Member]
Disclosure of detailed information about intangible assets [Line Items]
Estimated useful lives	20 years

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets - Summary of Reconciliation of Intangible Assets (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Goodwill [Member]
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Beginning Balance	$ 11,986	$ 11,431
Acquisitions (Note 25)	167	543
Additions - internally developed		0
Foreign currency translation and other	45	12
Disposals	0
Impairment		0
Amortization	0	0
Ending Balance	12,198	11,986
Goodwill [Member] \| Gross Carrying amount [Member]
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Beginning Balance	11,993
Ending Balance	12,205	11,993
Goodwill [Member] \| Accumulated depreciation, amortisation and impairment [Member]
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Beginning Balance	(7)
Ending Balance	(7)	(7)
Goodwill [Member] \| Additions Internally Developed [Member]
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Additions - internally developed	0
Customer relationships [Member]
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Beginning Balance	1,584	1,554
Acquisitions (Note 25)	74	173
Additions - internally developed		0
Foreign currency translation and other	22	2
Disposals	0
Impairment		0
Amortization	(165)	(145)
Ending Balance	1,515	1,584
Customer relationships [Member] \| Gross Carrying amount [Member]
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Beginning Balance	1,906
Ending Balance	1,971	1,906
Customer relationships [Member] \| Accumulated depreciation, amortisation and impairment [Member]
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Beginning Balance	(322)
Ending Balance	(456)	(322)
Customer relationships [Member] \| Additions Internally Developed [Member]
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Additions - internally developed	0
Technology [Member]
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Beginning Balance	351	117
Acquisitions (Note 25)	2	43
Additions - internally developed		197
Foreign currency translation and other	20	9
Disposals	(3)
Impairment		0
Amortization	(39)	(15)
Ending Balance	437	351
Technology [Member] \| Gross Carrying amount [Member]
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Beginning Balance	429
Ending Balance	544	429
Technology [Member] \| Accumulated depreciation, amortisation and impairment [Member]
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Beginning Balance	(78)
Ending Balance	(107)	(78)
Technology [Member] \| Additions Internally Developed [Member]
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Additions - internally developed	106
Trade names [Member]
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Beginning Balance	62	90
Acquisitions (Note 25)	8	13
Additions - internally developed		0
Foreign currency translation and other	14	18
Disposals	0
Impairment		(35)
Amortization	(9)	(24)
Ending Balance	75	62
Trade names [Member] \| Gross Carrying amount [Member]
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Beginning Balance	92
Ending Balance	111	92
Trade names [Member] \| Accumulated depreciation, amortisation and impairment [Member]
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Beginning Balance	(30)
Ending Balance	(36)	(30)
Trade names [Member] \| Additions Internally Developed [Member]
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Additions - internally developed	0
Other [Member]
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Beginning Balance	431	449
Acquisitions (Note 25)	6	115
Additions - internally developed		2
Foreign currency translation and other	(22)	(25)
Disposals	0
Impairment		(33)
Amortization	(70)	(77)
Ending Balance	361	431
Other [Member] \| Gross Carrying amount [Member]
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Beginning Balance	597
Ending Balance	597	597
Other [Member] \| Accumulated depreciation, amortisation and impairment [Member]
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Beginning Balance	(166)
Ending Balance	(236)	(166)
Other [Member] \| Additions Internally Developed [Member]
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Additions - internally developed	16
Intangible assets other than goodwill [Member]
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Beginning Balance	2,428	2,210
Acquisitions (Note 25)	90	344
Additions - internally developed		199
Foreign currency translation and other	34	4
Disposals	(3)
Impairment		(68)
Amortization	(283)	(261)
Ending Balance	2,388	2,428
Intangible assets other than goodwill [Member] \| Gross Carrying amount [Member]
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Beginning Balance	3,024
Ending Balance	3,223	3,024
Intangible assets other than goodwill [Member] \| Accumulated depreciation, amortisation and impairment [Member]
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Beginning Balance	(596)
Ending Balance	(835)	$ (596)
Intangible assets other than goodwill [Member] \| Additions Internally Developed [Member]
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Additions - internally developed	$ 122

Goodwill and Other Intangible_5

Goodwill and Other Intangible Assets - Summary of Reconciliation of Intangible Assets (Parenthetical) (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Remaining amortization period of intangible assets	6 years
North America Retail [Member]
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Amount recoverable amount exceeds its carrying amount	$ 1,700,000,000
Percent by which units recoverable amount exceeds its carrying amount	13.00%
Selling Expenses [Member]
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Amortization	$ 254,000,000	$ 234,000,000

Goodwill and Other Intangible_6

Goodwill and Other Intangible Assets - Summary of Goodwill by Groups of Cash Generating Unit (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Disclosure of goodwill allocated to CGUs [Line Items]
Goodwill	$ 12,198	$ 11,986
Groups of Cash-generating units [Member] \| Potash [Member]
Disclosure of goodwill allocated to CGUs [Line Items]
Goodwill	154	154
Groups of Cash-generating units [Member] \| Nitrogen [Member]
Disclosure of goodwill allocated to CGUs [Line Items]
Goodwill	4,395	4,395
Groups of Cash-generating units [Member] \| North America Retail [Member]
Disclosure of goodwill allocated to CGUs [Line Items]
Goodwill	6,869	6,826
Groups of Cash-generating units [Member] \| International Retail [Member]
Disclosure of goodwill allocated to CGUs [Line Items]
Goodwill	$ 780	$ 611

Goodwill and Other Intangible_7

Goodwill and Other Intangible Assets - Summary of Terminal Growth Rate and Corresponding Discount Rate (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Retail [Member]
Disclosure of goodwill allocated to CGUs [Line Items]
Terminal Growth Rate		2.50%
Potash [Member]
Disclosure of goodwill allocated to CGUs [Line Items]
Discount Rate	8.00%	8.00%
Terminal Growth Rate	2.50%	2.50%
Nitrogen [Member]
Disclosure of goodwill allocated to CGUs [Line Items]
Discount Rate	8.00%	9.00%
Terminal Growth Rate	2.00%	2.00%
North America Retail [Member]
Disclosure of goodwill allocated to CGUs [Line Items]
Discount Rate	7.50%	7.00%
Percent by which units recoverable amount exceeds its carrying amount	13.00%
Terminal Growth Rate	2.50%
North America Retail [Member] \| Carrying Amount Change Recoverable Amount [Member]
Disclosure of goodwill allocated to CGUs [Line Items]
Terminal Growth Rate	(0.80%)
Forecasted EBITDA over forecast period	(9.10%)
Breakeven Discount Rate	0.70%
North America Retail [Member] \| Impairment Model Value [Member]
Disclosure of goodwill allocated to CGUs [Line Items]
Terminal Growth Rate	2.50%
Forecasted EBITDA over forecast period	$ 6,000
Breakeven Discount Rate	7.50%
International Retail [Member]
Disclosure of goodwill allocated to CGUs [Line Items]
Terminal Growth Rate	2.00%	2.00%
International Retail [Member] \| Bottom of range [Member]
Disclosure of goodwill allocated to CGUs [Line Items]
Discount Rate	7.80%	7.50%
International Retail [Member] \| Top of range [Member]
Disclosure of goodwill allocated to CGUs [Line Items]
Discount Rate	16.00%	15.00%

Goodwill and Other Intangible_8

Goodwill and Other Intangible Assets - Summary of Key Assumptions, Change In Retail Segment Recoverable Amount (Detail) - North America Retail [Member]	Dec. 31, 2020USD ($)
Disclosure Of Key Assumptions Used In Calculating Recoverable Amount [Line Items]
Percentage of recoverable carrying amount	13.00%
Recoverable amount exceeds its carrying amount	$ 1,700,000,000

Investments - Summary of Equity

Investments - Summary of Equity-Accounted Investees and Investments at FVTOCI (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure Of Interests In Other Entities [Line Items]
Carrying Amount	$ 409	$ 660
Carrying Amount	153	161
Total Gross Proceeds	(540)	0
Pre-tax gain	$ 250	$ 0
Profertil [Member]
Disclosure Of Interests In Other Entities [Line Items]
Principal Activity	Nitrogen Producer
Principal Place of Business and Incorporation	Argentina
Proportion of ownership interest in associate	50.00%	50.00%
Carrying Amount	$ 233	$ 212
Sinofert [Member]
Disclosure Of Interests In Other Entities [Line Items]
Principal Activity	Fertilizer Supplier and Distributor
Principal Place of Business and Incorporation	China/Bermuda
Proportion of ownership interest in associate	22.00%
Proportion of ownership interest in investment	22.00%	22.00%
Carrying Amount	$ 153	$ 161
MOPCO [Member]
Disclosure Of Interests In Other Entities [Line Items]
Principal Activity	Nitrogen Producer
Principal Place of Business and Incorporation	Egypt
Proportion of ownership interest in associate	0.00%	26.00%
Carrying Amount	$ 0	$ 270
Total Gross Proceeds	540
Pre-tax gain	$ 250
Canpotex [Member]
Disclosure Of Interests In Other Entities [Line Items]
Principal Activity	Marketing and Logistics
Principal Place of Business and Incorporation	Canada
Proportion of ownership interest in associate	50.00%	50.00%
Carrying Amount	$ 0	$ 0
Other associates and joint ventures [Member]
Disclosure Of Interests In Other Entities [Line Items]
Carrying Amount	$ 176	$ 178

Investments - Summary of Equi_2

Investments - Summary of Equity-Accounted Investees and Investments at FVTOCI (Parenthetical) (Detail)	12 Months Ended
	Dec. 31, 2020
Sinofert [Member]
Disclosure Of Interests In Other Entities [Line Items]
Proportion of Ownership Interest and Voting Rights Held	22.00%

Other Assets - Summary of Other

Other Assets - Summary of Other Assets (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Miscellaneous non-current assets [abstract]
Deferred income tax assets (Note 8)	$ 242	$ 249
Ammonia catalysts - net of accumulated amortization of $76 (2019 - $71)	89	89
Long-term income tax receivable (Note 8)	305	36
Accrued pension benefit asset (Note 21)	109	25
Other - net of accumulated amortization of $44 (2019 - $41)	169	165
Other assets	$ 914	$ 564

Other Assets - Summary of Oth_2

Other Assets - Summary of Other Assets (Parenthetical) (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Miscellaneous non-current assets [abstract]
Ammonia catalyst	$ 76	$ 71
Other	$ 44	$ 41

Short-Term Debt - Additional In

Short-Term Debt - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of detailed information about borrowings [Line Items]
Commercial paper authorized to issue	$ 4,500	$ 4,500
Facility Limit	159	326
Other facilities [Member]
Disclosure of detailed information about borrowings [Line Items]
Other Credit Facilities	$ 740
Other facilities [Member] \| Bottom of range [Member]
Disclosure of detailed information about borrowings [Line Items]
Rate of Interest	0.80%
Other facilities [Member] \| Top of range [Member]
Disclosure of detailed information about borrowings [Line Items]
Rate of Interest	36.00%
Uncommitted revolving demand facility [Member]
Disclosure of detailed information about borrowings [Line Items]
Undrawn Borrowing Facilities Before Letters Of Credit And Direct Borrowings	$ 0	0
Facility Limit	500
Unsecured revolving term credit facility [Member]
Disclosure of detailed information about borrowings [Line Items]
Undrawn Borrowing Facilities Before Letters Of Credit And Direct Borrowings	0	$ 0
Facility Limit	$ 4,500
Borrowings, maturity	April 10, 2023
Maturity date shall not exceed (years)	5 years
Committed revolving term credit facility [Member]
Disclosure of detailed information about borrowings [Line Items]
Undrawn Borrowing Facilities Before Letters Of Credit And Direct Borrowings	$ 1,500

Short-Term Debt - Summary of Sh

Short-Term Debt - Summary of Short-Term Debt (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Disclosure of detailed information about borrowings [abstract]
Commercial paper	$ 0	$ 650
Other credit facilities	159	326
Total	$ 159	$ 976

Short-Term Debt - Summary of _2

Short-Term Debt - Summary of Short-Term Debt (Parenthetical) (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2018
South America [Member]
Disclosure of detailed information about borrowings [Line Items]
Current unsecured bank loans received and current portion of non-current unsecured bank loans received	$ 109	$ 149
Borrowings, interest rate	0.80%
South America [Member] \| Bottom of range [Member]
Disclosure of detailed information about borrowings [Line Items]
Borrowings, interest rate	1.70%
South America [Member] \| Top of range [Member]
Disclosure of detailed information about borrowings [Line Items]
Borrowings, interest rate	36.00%
AUSTRALIA [Member]
Disclosure of detailed information about borrowings [Line Items]
Current unsecured bank loans received and current portion of non-current unsecured bank loans received	$ 19	157
Borrowings, interest rate	0.80%
Other country [Member]
Disclosure of detailed information about borrowings [Line Items]
Current unsecured bank loans received and current portion of non-current unsecured bank loans received	$ 31	$ 20
Borrowings, interest rate	1.00%

Long-Term Debt - Summary of Lon

Long-Term Debt - Summary of Long-Term Debt (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of detailed information about borrowings [Line Items]
Borrowings	$ 9,742	$ 8,708
Add net unamortized fair value adjustments	404	424
Less net unamortized debt issue costs	(85)	(77)
Less current maturities	(14)	(508)
Add current portion of net unamortized debt issue costs	0	6
Current borrowings after current portion of net unamortized debt issuance	(14)	(502)
Non-current portion of non-current borrowings	$ 10,047	8,553
Notes Issued Note One [Member]
Disclosure of detailed information about borrowings [Line Items]
Rate of Interest	4.875%
Maturity	March 30, 2020
Debentures issued	$ 0	500
Notes Issued Note Two [Member]
Disclosure of detailed information about borrowings [Line Items]
Rate of Interest	3.15%
Maturity	October 1, 2022
Debentures issued	$ 500	500
Notes Issued Note Three [Member]
Disclosure of detailed information about borrowings [Line Items]
Rate of Interest	1.90%
Maturity	May 13, 2023
Debentures issued	$ 500	0
Notes Issued Note Four [Member]
Disclosure of detailed information about borrowings [Line Items]
Rate of Interest	3.50%
Maturity	June 1, 2023
Debentures issued	$ 500	500
Notes Issued Note Five [Member]
Disclosure of detailed information about borrowings [Line Items]
Rate of Interest	3.625%
Maturity	March 15, 2024
Debentures issued	$ 750	750
Notes Issued Note Six [Member]
Disclosure of detailed information about borrowings [Line Items]
Rate of Interest	3.375%
Maturity	March 15, 2025
Debentures issued	$ 550	550
Notes Issued Note Seven [Member]
Disclosure of detailed information about borrowings [Line Items]
Rate of Interest	3.00%
Maturity	April 1, 2025
Debentures issued	$ 500	500
Notes Issued Note Eight [Member]
Disclosure of detailed information about borrowings [Line Items]
Rate of Interest	4.00%
Maturity	December 15, 2026
Debentures issued	$ 500	500
Notes Issued Note Nine [Member]
Disclosure of detailed information about borrowings [Line Items]
Rate of Interest	4.20%
Maturity	April 1, 2029
Debentures issued	$ 750	750
Notes Issued Note Ten [Member]
Disclosure of detailed information about borrowings [Line Items]
Rate of Interest	2.95%
Maturity	May 13, 2030
Debentures issued	$ 500	0
Notes Issued Note Eleven [Member]
Disclosure of detailed information about borrowings [Line Items]
Rate of Interest	4.125%
Maturity	March 15, 2035
Debentures issued	$ 450	450
Notes Issued Note Twelve [Member]
Disclosure of detailed information about borrowings [Line Items]
Rate of Interest	7.125%
Maturity	May 23, 2036
Debentures issued	$ 300	300
Notes Issued Note Thirteen [Member]
Disclosure of detailed information about borrowings [Line Items]
Rate of Interest	5.875%
Maturity	December 1, 2036
Debentures issued	$ 500	500
Notes Issued Note Fourteen [Member]
Disclosure of detailed information about borrowings [Line Items]
Rate of Interest	5.625%
Maturity	December 1, 2040
Debentures issued	$ 500	500
Notes Issued Note Fifteen [Member]
Disclosure of detailed information about borrowings [Line Items]
Rate of Interest	6.125%
Maturity	January 15, 2041
Debentures issued	$ 500	500
Notes Issued Note Sixteen [Member]
Disclosure of detailed information about borrowings [Line Items]
Rate of Interest	4.90%
Maturity	June 1, 2043
Debentures issued	$ 500	500
Notes Issued Note Seventeen [Member]
Disclosure of detailed information about borrowings [Line Items]
Rate of Interest	5.25%
Maturity	January 15, 2045
Debentures issued	$ 500	500
Notes Issued Note Eighteen [Member]
Disclosure of detailed information about borrowings [Line Items]
Rate of Interest	5.00%
Maturity	April 1, 2049
Debentures issued	$ 750	750
Notes Issued Note Nineteen [Member]
Disclosure of detailed information about borrowings [Line Items]
Rate of Interest	3.95%
Maturity	May 13, 2050
Debentures issued	$ 500	0
Notes Issued Note Twenty [Member]
Disclosure of detailed information about borrowings [Line Items]
Rate of Interest	7.80%
Maturity	February 1, 2027
Debentures issued	$ 125	125
Other [Member]
Disclosure of detailed information about borrowings [Line Items]
Other borrowings	$ 67	$ 33

Long-Term Debt - Summary of L_2

Long-Term Debt - Summary of Long-Term Debt (Parenthetical) (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2020USD ($)
Disclosure of detailed information about borrowings [abstract]
Sinking fund requirements	$ 0

Long-Term Debt - Summary of Cha

Long-Term Debt - Summary of Changes in Liabilities Arising From Financing Activities (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of reconciliation of liabilities arising from financing activities [Line Items]
Beginning Balance	$ 11,104	$ 9,223
Adoption of IFRS 16 (Note 13)	1,019	1,055	$ 1,059
Debt acquired (Note 4)	0
Cash flows	(149)	453
Additions and other adjustments to ROU assets	320	125
Reclassifications	0	0
Foreign currency translation and other non-cash changes	85	244
Ending Balance	11,360	11,104
Adoption of IFRS 16 (Note 13)		1,059
Short-term debt and current portion of long-term debt [Member]
Disclosure of reconciliation of liabilities arising from financing activities [Line Items]
Beginning Balance	1,478	1,624
Cash flows	(1,401)	(794)
Additions and other adjustments to ROU assets	0	0
Reclassifications	11	500
Foreign currency translation and other non-cash changes	85	148
Ending Balance	173	1,478
Adoption of IFRS 16 (Note 13)		0
Long-term debt [Member]
Disclosure of reconciliation of liabilities arising from financing activities [Line Items]
Beginning Balance	8,553	7,579
Cash flows	1,526	1,481
Additions and other adjustments to ROU assets	0	0
Reclassifications	(11)	(500)
Foreign currency translation and other non-cash changes	(21)	(7)
Ending Balance	10,047	8,553
Adoption of IFRS 16 (Note 13)		0
Current Portion Of Lease Liabilities [Member]
Disclosure of reconciliation of liabilities arising from financing activities [Line Items]
Beginning Balance	214	8
Cash flows	(274)	(234)
Additions and other adjustments to ROU assets	107	50
Reclassifications	194	178
Foreign currency translation and other non-cash changes	8	16
Ending Balance	249	214
Adoption of IFRS 16 (Note 13)		196
Lease Liabilities Borrowings [Member]
Disclosure of reconciliation of liabilities arising from financing activities [Line Items]
Beginning Balance	859	12
Cash flows	0	0
Additions and other adjustments to ROU assets	213	75
Reclassifications	(194)	(178)
Foreign currency translation and other non-cash changes	13	87
Ending Balance	$ 891	859
Adoption of IFRS 16 (Note 13)		$ 863

Lease Liabilities - Summary of

Lease Liabilities - Summary of Lease Liabilities (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Disclosure of reconciliation of liabilities arising from financing activities [Line Items]
Interest Rate On Lease Liabilities	3.00%
Current portion of lease liabilities	$ 249	$ 214
Lease liabilities - non-current	1,140	1,073
Long-term debt [Member]
Disclosure of reconciliation of liabilities arising from financing activities [Line Items]
Lease liabilities - non-current	$ 891	859
Short-term debt [Member]
Disclosure of reconciliation of liabilities arising from financing activities [Line Items]
Borrowings, interest rate	2.70%
Current portion of lease liabilities	$ 249	$ 214

Payables and Accrued Charges -

Payables and Accrued Charges - Summary of Payables and Accrued Charges (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Trade and other payables [abstract]
Trade and other payables	$ 4,415	$ 4,016
Customer prepayments	1,800	1,693
Dividends	256	258
Accrued compensation	513	434
Current portion of asset retirement obligations and accrued environmental costs (Note 22)	162	148
Accrued interest	99	103
Current portion of share-based compensation (Note 5)	95	118
Current portion of derivatives	39	13
Income taxes (Note 8)	48	43
Current portion of pension and other post-retirement benefits (Note 21)	15	15
Other accrued charges and others	616	596
Total	$ 8,058	$ 7,437

Pension and Other Post-Retire_3

Pension and Other Post-Retirement Benefits - Summary of Significant Assumptions Used to Determine Benefit Obligations and Expense (Detail) - Benefit obligations [Member]	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Pension [Member]
Disclosure of sensitivity analysis for actuarial assumptions [Line Items]
Discount rate, %	2.83%	3.35%
Rate of increase in compensation levels (%)	4.57%	4.66%
Life expectancy at 65 for a male member currently at age 65	20.6	20.5
Life expectancy at 65 for a female member currently at age 65	22.8	22.7
Average duration of the defined benefit obligations (years)	15 years 146 days	14 years 223 days
Other [Member]
Disclosure of sensitivity analysis for actuarial assumptions [Line Items]
Discount rate, %	2.66%	3.20%
Medical cost trend rate - year reaches ultimate trend rate	2037	2037
Life expectancy at 65 for a male member currently at age 65	20.2	20.3
Life expectancy at 65 for a female member currently at age 65	22.8	22.9
Average duration of the defined benefit obligations (years)	15 years 73 days	15 years 292 days
Other [Member] \| Top of range [Member]
Disclosure of sensitivity analysis for actuarial assumptions [Line Items]
Medical cost trend rate - assumed (%)	5.80%	6.10%
Other [Member] \| Bottom of range [Member]
Disclosure of sensitivity analysis for actuarial assumptions [Line Items]
Medical cost trend rate - assumed (%)	4.50%	4.50%

Pension and Other Post-Retire_4

Pension and Other Post-Retirement Benefits - Summary of Significant Assumptions Used to Determine Benefit Obligations and Expense (Parenthetical) (Detail) - Benefit obligations [Member] - Other [Member]	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of sensitivity analysis for actuarial assumptions [Line Items]
Medical cost trend rate - year reaches ultimate trend rate	2037	2037
Top of range [Member]
Disclosure of sensitivity analysis for actuarial assumptions [Line Items]
Medical cost trend rate - assumed (%)	5.80%	6.10%
Bottom of range [Member]
Disclosure of sensitivity analysis for actuarial assumptions [Line Items]
Medical cost trend rate - assumed (%)	4.50%	4.50%

Pension and Other Post-Retire_5

Pension and Other Post-Retirement Benefits - Summary of Significant Assumptions, Change in Discount Rates has Greatest Potential Impact (Detail) - Actuarial assumption of discount rates [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of sensitivity analysis for actuarial assumptions [Line Items]
Change in Assumption, increase	1.00%	1.00%
Change in Assumption, decrease	1.00%	1.00%
Benefit obligations, as reported	$ 2,066	$ 2,044
Benefit obligations, 1.0 percentage point increase	360	340
Benefit obligations, 1.0 percentage point decrease	(280)	(270)
Expense in Earnings before Income Taxes, as reported	52	71
Expense in Earnings before Income Taxes, 1.0 percentage point increase	10	10
Expense in Earnings before Income Taxes, 1.0 percentage point decrease	$ (10)	$ (10)

Pension and Other Post-Retire_6

Pension and Other Post-Retirement Benefits - Summary of Movements in Pension and Other Post-Retirement Benefit Assets (Liabilities) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of net defined benefit liability (asset) [Line Items]
Beginning Balance	$ (423)	$ (381)
Current service cost for benefits earned during the year	(36)	(40)
Interest (expense) income	(13)	(15)
Past service cost, including curtailment gains and settlements	1	0
Foreign exchange rate changes and other	(4)	(16)
Components of defined benefit expense recognized in earnings	(52)	(71)
Changes in financial assumptions	153	199
Changes in demographic assumptions	(12)	(14)
Gain on plan assets (excluding amounts included in net interest)	(230)	(193)
Remeasurements of the net defined benefit liability recognized in OCI during the year	(89)	(8)
Contributions by plan participants	0	0
Employer contributions	(26)	(21)
Benefits paid	0	0
Cash flows	(26)	(21)
Ending Balance	(360)	(423)
Other assets [Member]
Disclosure of net defined benefit liability (asset) [Line Items]
Beginning Balance	25
Ending Balance	109	25
Pension and other post-retirement benefits liabilities [Member]
Disclosure of net defined benefit liability (asset) [Line Items]
Beginning Balance	(433)
Ending Balance	(454)	(433)
Payables and accrued charges [Member]
Disclosure of net defined benefit liability (asset) [Line Items]
Beginning Balance	(15)
Ending Balance	(15)	(15)
Present value of defined benefit obligation [Member]
Disclosure of net defined benefit liability (asset) [Line Items]
Beginning Balance	(2,044)	(1,797)
Current service cost for benefits earned during the year	(36)	(40)
Interest (expense) income	(66)	(74)
Past service cost, including curtailment gains and settlements	133	0
Foreign exchange rate changes and other	(3)	(29)
Components of defined benefit expense recognized in earnings	28	(143)
Changes in financial assumptions	153	199
Changes in demographic assumptions	(12)	(14)
Gain on plan assets (excluding amounts included in net interest)	0	0
Remeasurements of the net defined benefit liability recognized in OCI during the year	141	185
Contributions by plan participants	5	5
Employer contributions	0	0
Benefits paid	(96)	(86)
Cash flows	(91)	(81)
Ending Balance	(2,066)	(2,044)
Plan assets [Member]
Disclosure of net defined benefit liability (asset) [Line Items]
Beginning Balance	1,621	1,416
Current service cost for benefits earned during the year	0	0
Interest (expense) income	53	59
Past service cost, including curtailment gains and settlements	(132)	0
Foreign exchange rate changes and other	(1)	13
Components of defined benefit expense recognized in earnings	(80)	72
Changes in financial assumptions	0	0
Changes in demographic assumptions	0	0
Gain on plan assets (excluding amounts included in net interest)	(230)	(193)
Remeasurements of the net defined benefit liability recognized in OCI during the year	(230)	(193)
Contributions by plan participants	(5)	(5)
Employer contributions	(26)	(21)
Benefits paid	96	86
Cash flows	65	60
Ending Balance	$ 1,706	$ 1,621

Pension and Other Post-Retire_7

Pension and Other Post-Retirement Benefits - Summary of Movements in Pension and Other Post-Retirement Benefit Assets (Liabilities) (Parenthetical) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of net defined benefit liability (asset) [Line Items]
Net obligation	$ (360)	$ (423)	$ (381)
Present value of defined benefit obligation [Member]
Disclosure of net defined benefit liability (asset) [Line Items]
Net obligation	(2,066)	(2,044)	(1,797)
Plan assets [Member]
Disclosure of net defined benefit liability (asset) [Line Items]
Net obligation	1,706	1,621	$ 1,416
Pension [Member] \| Present value of defined benefit obligation [Member]
Disclosure of net defined benefit liability (asset) [Line Items]
Funded status net defined benefit liability asset	1,690	(1,652)
Obligations arising from unfunded plans	376	(392)
Other [Member] \| Plan assets [Member]
Disclosure of net defined benefit liability (asset) [Line Items]
Net obligation	$ 0	$ 0

Pension and Other Post-Retire_8

Pension and Other Post-Retirement Benefits - Summary of Fair Value of Plan Assets of the Defined Benefit Pension Plans, by Asset Category (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Disclosure of fair value of plan assets [Line Items]
Cash and cash equivalents	$ 42	$ 120
Debt securities	571	698
International balanced fund	0	112
Other	37	22
Total pension plan assets	1,706	1,621
US Securities [Member]
Disclosure of fair value of plan assets [Line Items]
Equity securities and equity funds	898	572
International Securities [Member]
Disclosure of fair value of plan assets [Line Items]
Equity securities and equity funds	158	97
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Disclosure of fair value of plan assets [Line Items]
Cash and cash equivalents	9	8
Debt securities	0	0
International balanced fund	0	0
Other	0	0
Total pension plan assets	186	44
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| US Securities [Member]
Disclosure of fair value of plan assets [Line Items]
Equity securities and equity funds	19	1
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| International Securities [Member]
Disclosure of fair value of plan assets [Line Items]
Equity securities and equity funds	158	35
Other (Level 2 & 3) [Member]
Disclosure of fair value of plan assets [Line Items]
Cash and cash equivalents	33	112
Debt securities	571	698
International balanced fund	0	112
Other	37	22
Total pension plan assets	1,520	1,577
Other (Level 2 & 3) [Member] \| US Securities [Member]
Disclosure of fair value of plan assets [Line Items]
Equity securities and equity funds	879	571
Other (Level 2 & 3) [Member] \| International Securities [Member]
Disclosure of fair value of plan assets [Line Items]
Equity securities and equity funds	$ 0	$ 62

Pension and Other Post-Retire_9

Pension and Other Post-Retirement Benefits - Summary of Fair Value of Plan Assets of the Defined Benefit Pension Plans, by Asset Category (Parenthetical) (Detail)	Dec. 31, 2020	Dec. 31, 2019
Disclosure of fair value of plan assets [Line Items]
Other plan assets held in funds estimated fair values	76.00%	60.00%
US Securities [Member]
Disclosure of fair value of plan assets [Line Items]
Debt securities	60.00%	82.00%
International Securities [Member]
Disclosure of fair value of plan assets [Line Items]
Debt securities	40.00%	18.00%

Pension and Other Post-Retir_10

Pension and Other Post-Retirement Benefits - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2021
Disclosure of defined benefit plans [abstract]
Expected contributions to all pension and post-retirement plans in next 12 months			$ 125
Total contributions recognized as expense under all defined contribution plans	$ 116	$ 88

Asset Retirement Obligations _3

Asset Retirement Obligations and Accrued Environmental Costs - Summary of Pre-Tax Risk-Free Discount Rate and Expected Cash Flow Payments for Asset Retirement Obligations and Accrued Environmental Costs (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2020USD ($)
Phosphate sites [Member]
Disclosure of asset retirement obligations and accrued environmental costs [Line Items]
Cash Flow Payments (years)	55 years
Asset retirement obligations [Member]
Disclosure of asset retirement obligations and accrued environmental costs [Line Items]
Undiscounted Cash Flows	$ 2,800
Asset retirement obligations [Member] \| Bottom of range [Member]
Disclosure of asset retirement obligations and accrued environmental costs [Line Items]
-0.5% Discount Rate	90
Asset retirement obligations [Member] \| Top of range [Member]
Disclosure of asset retirement obligations and accrued environmental costs [Line Items]
+0.5% Discount Rate	(70)
Asset retirement obligations [Member] \| Potash sites [Member]
Disclosure of asset retirement obligations and accrued environmental costs [Line Items]
Discounted Cash Flows	$ 76
Asset retirement obligations [Member] \| Potash sites [Member] \| Bottom of range [Member]
Disclosure of asset retirement obligations and accrued environmental costs [Line Items]
Cash Flow Payments (years)	33
Asset retirement obligations [Member] \| Potash sites [Member] \| Top of range [Member]
Disclosure of asset retirement obligations and accrued environmental costs [Line Items]
Cash Flow Payments (years)	441
Asset retirement obligations [Member] \| Phosphate sites [Member]
Disclosure of asset retirement obligations and accrued environmental costs [Line Items]
Discounted Cash Flows	$ 468
Asset retirement obligations [Member] \| Phosphate sites [Member] \| Bottom of range [Member]
Disclosure of asset retirement obligations and accrued environmental costs [Line Items]
Cash Flow Payments (years)	1
Asset retirement obligations [Member] \| Phosphate sites [Member] \| Top of range [Member]
Disclosure of asset retirement obligations and accrued environmental costs [Line Items]
Cash Flow Payments (years)	80
Asset retirement obligations [Member] \| Retail Site [Member]
Disclosure of asset retirement obligations and accrued environmental costs [Line Items]
Discounted Cash Flows	$ 25
Asset retirement obligations [Member] \| Retail Site [Member] \| Bottom of range [Member]
Disclosure of asset retirement obligations and accrued environmental costs [Line Items]
Cash Flow Payments (years)	1
Asset retirement obligations [Member] \| Retail Site [Member] \| Top of range [Member]
Disclosure of asset retirement obligations and accrued environmental costs [Line Items]
Cash Flow Payments (years)	30
Asset retirement obligations [Member] \| Corporate And Other Sites [Member]
Disclosure of asset retirement obligations and accrued environmental costs [Line Items]
Discounted Cash Flows	$ 640
Asset retirement obligations [Member] \| Corporate And Other Sites [Member] \| Bottom of range [Member]
Disclosure of asset retirement obligations and accrued environmental costs [Line Items]
Cash Flow Payments (years)	1
Asset retirement obligations [Member] \| Corporate And Other Sites [Member] \| Top of range [Member]
Disclosure of asset retirement obligations and accrued environmental costs [Line Items]
Cash Flow Payments (years)	482
Accrued environmental costs [Member] \| Bottom of range [Member]
Disclosure of asset retirement obligations and accrued environmental costs [Line Items]
Risk-Free Rate	1.20%
-0.5% Discount Rate	$ 5
Accrued environmental costs [Member] \| Top of range [Member]
Disclosure of asset retirement obligations and accrued environmental costs [Line Items]
Risk-Free Rate	6.50%
+0.5% Discount Rate	$ (10)
Accrued environmental costs [Member] \| Retail Site [Member]
Disclosure of asset retirement obligations and accrued environmental costs [Line Items]
Discounted Cash Flows	$ 89
Accrued environmental costs [Member] \| Retail Site [Member] \| Bottom of range [Member]
Disclosure of asset retirement obligations and accrued environmental costs [Line Items]
Cash Flow Payments (years)	1
Accrued environmental costs [Member] \| Retail Site [Member] \| Top of range [Member]
Disclosure of asset retirement obligations and accrued environmental costs [Line Items]
Cash Flow Payments (years)	30
Accrued environmental costs [Member] \| Corporate And Other Sites [Member]
Disclosure of asset retirement obligations and accrued environmental costs [Line Items]
Discounted Cash Flows	$ 461
Accrued environmental costs [Member] \| Corporate And Other Sites [Member] \| Bottom of range [Member]
Disclosure of asset retirement obligations and accrued environmental costs [Line Items]
Cash Flow Payments (years)	1
Accrued environmental costs [Member] \| Corporate And Other Sites [Member] \| Top of range [Member]
Disclosure of asset retirement obligations and accrued environmental costs [Line Items]
Cash Flow Payments (years)	20

Asset Retirement Obligations _4

Asset Retirement Obligations and Accrued Environmental Costs - Summary of Sensitivity of Asset Retirement Obligations and Accrued Environmental Costs to Changes in Discount Rate on Recorded Liability (Parenthetical) (Detail) - Undiscounted Cash Flow [Member] - Potash [Member]	12 Months Ended
	Dec. 31, 2020
Bottom of range [Member]
Disclosure of asset retirement obligations and accrued environmental costs [Line Items]
Final decommissioning period	92 years
Top of range [Member]
Disclosure of asset retirement obligations and accrued environmental costs [Line Items]
Final decommissioning period	407 years

Asset Retirement Obligations _5

Asset Retirement Obligations and Accrued Environmental Costs - Summary of Reconciliation of Asset Retirement, Environmental Restoration Obligations (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2020USD ($)
Disclosure of asset retirement obligations and accrued environmental costs [Line Items]
Other provisions beginning balance	$ 1,798
Acquisitions	27
Disposals	(3)
Change in estimates	(7)
Recorded in earnings	34
Settled during the year	(109)
Foreign currency translation and other	19
Other provisions ending balance	1,759
Current liabilities
Payables and accrued charges (Note 20)	162
Non-current liabilities
Asset retirement obligations and accrued environmental costs	1,597
Asset retirement obligations [Member]
Disclosure of asset retirement obligations and accrued environmental costs [Line Items]
Other provisions beginning balance	1,254
Acquisitions	12
Disposals	0
Change in estimates	(9)
Recorded in earnings	31
Settled during the year	(88)
Foreign currency translation and other	9
Other provisions ending balance	1,209
Current liabilities
Payables and accrued charges (Note 20)	121
Non-current liabilities
Asset retirement obligations and accrued environmental costs	1,088
Accrued environmental costs [Member]
Disclosure of asset retirement obligations and accrued environmental costs [Line Items]
Other provisions beginning balance	544
Acquisitions	15
Disposals	(3)
Change in estimates	2
Recorded in earnings	3
Settled during the year	(21)
Foreign currency translation and other	10
Other provisions ending balance	550
Current liabilities
Payables and accrued charges (Note 20)	41
Non-current liabilities
Asset retirement obligations and accrued environmental costs	$ 509

Share Capital - Summary of Shar

Share Capital - Summary of Shares Issued (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of classes of share capital [Line Items]
Beginning Balance	572,942,809	608,535,477
Ending Balance	569,260,406	572,942,809
Beginning Balance	$ 15,771
Ending Balance	$ 15,673	$ 15,771
Share Capital [Member]
Disclosure of classes of share capital [Line Items]
Beginning Balance	572,942,809
Issued under option plans and share-settled plans	150,177
Repurchased	3,832,580
Ending Balance	569,260,406	572,942,809
Beginning Balance	$ 15,771
Issued under option plans and share-settled plans		$ 7
Repurchased		105
Ending Balance	$ 15,673	$ 15,771

Share Capital - Additional Info

Share Capital - Additional Information (Detail) - USD ($)

12 Months Ended

Feb. 18, 2021

Dec. 31, 2020

Feb. 26, 2020

Dec. 31, 2019

Dec. 10, 2020

Aug. 10, 2020

May 06, 2020

Feb. 19, 2020

Dec. 13, 2019

Jul. 30, 2019

May 10, 2019

Disclosure of classes of share capital [Line Items]

Number of common shares repurchased for cancellation

710,100

3,832,580

33,256,668

36,067,323

Average cost shares repurchased for cancellation

$ 41.96

$ 52.07

Dividends paid, ordinary shares

[1]

$ 1,029,000,000

$ 754,000,000

Dividend Declared Per Share

$ 0.46

$ 0.45

Total Estimated Dividends to be Paid

$ 262,000,000

Share Capital [Member]

Disclosure of classes of share capital [Line Items]

Dividends paid, ordinary shares

$ 0

2021 Normal Course Issuer Bid [Member]

Disclosure of classes of share capital [Line Items]

Payment for common shares repurchased for cancellation

$ 28,468,448

Dividend declared [Member] | Share Capital [Member]

Disclosure of classes of share capital [Line Items]

Dividend Declared Per Share

$ 0.45

$ 0.43

Share repurchase program [Member] | 2019 Normal Course Issuer Bid [Member]

Disclosure of classes of share capital [Line Items]

Maximum percentage of outstanding common shares to be repurchased

7.00%

Period of share repurchase program

364 days

Share repurchase program [Member] | 2020 Normal Course Issuer Bid [Member]

Disclosure of classes of share capital [Line Items]

Maximum percentage of outstanding common shares to be repurchased

5.00%

Period of share repurchase program

1 year

Number of common shares repurchased for cancellation

42,164,420

Share repurchase program [Member] | 2021 Normal Course Issuer Bid [Member]

Disclosure of classes of share capital [Line Items]

Maximum percentage of outstanding common shares to be repurchased

5.00%

Period of share repurchase program

364 days

Number of common shares repurchased for cancellation

28,572,458

[1]

All equity transactions were attributable to common shareholders.

Share Capital - Summary of Sh_2

Share Capital - Summary of Share Repurchases (Detail) - USD ($) $ / shares in Units, $ in Millions		12 Months Ended
		Feb. 18, 2021	Dec. 31, 2020	Feb. 26, 2020	Dec. 31, 2019
Disclosure of Share Repurchases [Line Items]
Common shares repurchased for cancellation		710,100	3,832,580	33,256,668	36,067,323
Average price per share			$ 41.96		$ 52.07
Shares repurchased	[1]		$ 160		$ 1,878
Share Capital [Member]
Disclosure of Share Repurchases [Line Items]
Shares repurchased			105		992
Contributed Surplus [Member]
Disclosure of Share Repurchases [Line Items]
Shares repurchased			55		0
Retained Earnings [Member]
Disclosure of Share Repurchases [Line Items]
Shares repurchased			$ 0		$ 886

[1]	All equity transactions were attributable to common shareholders.

Capital Management - Additional

Capital Management - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of objectives, policies and processes for managing capital [Line Items]
Period of base shelf prospectus	25 months
Debentures Issued Two Thousand and Twenty [Member]
Disclosure of objectives, policies and processes for managing capital [Line Items]
Notes and debentures issued	$ 1,500
Notes Issued Note Three [Member]
Disclosure of objectives, policies and processes for managing capital [Line Items]
Notes and debentures issued	$ 500	$ 0
Bottom of range [Member]
Disclosure of objectives, policies and processes for managing capital [Line Items]
Potential percentage of free cash flow targeted to be paid out	40.00%
Period Of Base Shelf Prospectus Date	Mar. 16, 2020
Top of range [Member]
Disclosure of objectives, policies and processes for managing capital [Line Items]
Potential percentage of free cash flow targeted to be paid out	60.00%
Common shares, debt and other securities authorized for issuance	$ 5,000
Period Of Base Shelf Prospectus Date	Apr. 16, 2022

Capital Management - Schedule o

Capital Management - Schedule of Adjusted Net Debt, Adjusted Shareholders' Equity and Adjusted Capital (Detail) - USD ($) $ in Millions		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of objectives, policies and processes for managing capital [abstract]
Short-term debt		$ 159	$ 976
Current portion of long-term debt		14	502
Current portion of lease liabilities		249	214
Long-term debt		10,047	8,553
Lease liabilities		891	859
Total debt		11,360	11,104
Cash and cash equivalents		(1,454)	(671)	$ (2,314)
Unamortized fair value adjustments		(404)	(424)
Adjusted net debt		9,502	10,009
Total shareholders' equity	[1]	22,365	22,869	$ 24,425
Accumulated other comprehensive (income) loss		119	251
Adjusted shareholders' equity		22,484	23,120
Adjusted capital		33,994	34,382
Letters of credit financial		150	158
Adjusted total debt		$ 11,510	$ 11,262

[1]	All equity transactions were attributable to common shareholders.

Capital Management - Components

Capital Management - Components of Ratios (Detail)	12 Months Ended
Capital Management - Components of Ratios (Detail)	Dec. 31, 2020	Dec. 31, 2019
Disclosure of objectives, policies and processes for managing capital [abstract]
Adjusted net debt to adjusted EBITDA	2.6	2.5
Debt to capital (Limit 0.65:1:00)	0.34:1.00	0.33:1:00
Adjusted EBITDA to adjusted finance costs	7.4	8

Capital Management -Summary of

Capital Management -Summary of EBITDA, Adjusted EBITDA and Adjusted Finance Costs (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of objectives, policies and processes for managing capital [abstract]
Finance costs	$ 520	$ 554
Unwinding of discount on asset retirement obligations	(33)	(54)
Borrowing costs capitalized to property, plant and equipment	20	18
Interest on net defined benefit pension and other post-retirement plan obligations	(13)	(15)
Adjusted finance costs	$ 494	$ 503

Business Combinations - Summary

Business Combinations - Summary of Fair Value Allocated to Assets and Liabilities (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Dec. 31, 2018
Disclosure of detailed information about business combination [Line Items]
Cash and cash equivalents	$ 1,454	$ 671		$ 2,314
Receivables	3,581	3,542
Inventories	4,930	4,975
Prepaid expenses and other current assets	1,505	1,477
Property, plant and equipment	19,660	20,335		$ 18,796
Goodwill	12,198	11,986
Other intangible assets	2,388	2,428
Investments	409	660
Other assets	914	564
TOTAL ASSETS	47,192	46,799
Short-term debt	159	976
Payables and accrued charges	8,058	7,437
Lease liabilities, including current portion	1,140	1,073
Deferred income tax liabilities	3,149	3,145
Pension and other post-retirement benefit liabilities	454	433
Asset retirement obligations and accrued environmental costs	1,597	1,650
Other non-current liabilities	209	161
TOTAL LIABILITIES	24,827	23,930
Ruralco \| Preliminary [Member]
Disclosure of detailed information about business combination [Line Items]
Receivables			$ 289
Inventories			117
Prepaid expenses and other current assets			8
Property, plant and equipment			136
Goodwill			202
Other intangible assets			165
Other assets			31
TOTAL ASSETS			948
Short-term debt			112
Payables and accrued charges			345
Lease liabilities, including current portion			110
Other non-current liabilities			51
TOTAL LIABILITIES			618
Total consideration			330
Ruralco \| Adjustments [Member]
Disclosure of detailed information about business combination [Line Items]
Receivables			27
Inventories			(5)
Prepaid expenses and other current assets			(1)
Property, plant and equipment			4
Goodwill			34
Other intangible assets			43
Other assets			(14)
TOTAL ASSETS			88
Short-term debt			55
Payables and accrued charges			(21)
Lease liabilities, including current portion			0
Other non-current liabilities			54
TOTAL LIABILITIES			88
Total consideration			0
Ruralco \| Revised Fair Value [Member]
Disclosure of detailed information about business combination [Line Items]
Receivables			316
Inventories			112
Prepaid expenses and other current assets			7
Property, plant and equipment			140
Goodwill			236
Other intangible assets			208
Other assets			17
TOTAL ASSETS			1,036
Short-term debt			167
Payables and accrued charges			324
Lease liabilities, including current portion			110
Other non-current liabilities			105
TOTAL LIABILITIES			706
Total consideration			$ 330
Other Aquisitions [Member]
Disclosure of detailed information about business combination [Line Items]
Receivables	68	68
Inventories	63	145
Prepaid expenses and other current assets	4	38
Property, plant and equipment	73	115
Goodwill	133	341
Other intangible assets	47	179
Other assets	2	2
TOTAL ASSETS	390	888
Short-term debt	36	25
Payables and accrued charges	108	156
Lease liabilities, including current portion	2	1
Other non-current liabilities	11	25
TOTAL LIABILITIES	157	207
Total consideration	$ 233	$ 581

Business Combinations - Summa_2

Business Combinations - Summary of Fair Value Allocated to Assets and Liabilities (Parenthetical) (Detail) - Receivables from Customers[Member] - Ruralco Inc [Member] $ in Millions	Dec. 31, 2020USD ($)
Disclosure of detailed information about business combination [Line Items]
Gross contractual amount	$ 260
Uncollectible contractual amount	$ 7

Business Combinations - Summa_3

Business Combinations - Summary of Financial Information Related to Acquired Operations (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Ruralco Inc [Member]
Disclosure of detailed information about business combination [Line Items]
Sales		$ 249
EBIT		(2)
Other Aquisitions [Member]
Disclosure of detailed information about business combination [Line Items]
Sales	$ 190	312
EBIT	12	$ (1)
Other Aquisitions [Member] \| Proforma [Member]
Disclosure of detailed information about business combination [Line Items]
Sales	350
EBIT	$ 26

Business Combinations - Additio

Business Combinations - Additional Information (Detail) $ in Millions	1 Months Ended	12 Months Ended
	Sep. 30, 2019USD ($)	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)
Disclosure of detailed information about business combination [Line Items]
Merger and related costs		$ (60)	$ (16)
Goodwill		12,198	11,986
Assets relating to equity-accounted investees		409	660
Ruralco Inc [Member]
Disclosure of detailed information about business combination [Line Items]
Goodwill	$ 236
Net assets (consideration for the Merger)	$ 330
Remaining interest in Agrichem acquired	100.00%
Number Of Operating Locations Acquired	250
Other Aquisitions [Member]
Disclosure of detailed information about business combination [Line Items]
Goodwill		$ 133	$ 341
Number of retail locations acquired		43	68
Net assets (consideration for the Merger)		$ 233	$ 581
Assets relating to equity-accounted investees			$ 100

Commitments - Additional Inform

Commitments - Additional Information (Detail)	12 Months Ended
Commitments - Additional Information (Detail)	Dec. 31, 2020T
Conda Phosphate operations [Member]
Disclosure of commitments [Line Items]
Percentage of ammonia supplied	100.00%
Percentage of mono ammonium phosphate purchased	100.00%
Estimated mono ammonium phosphate production	330,000
Profertil [Member]
Disclosure of commitments [Line Items]
Percentage of gas supplied by JV partner	70.00%
Carseland [Member]
Disclosure of commitments [Line Items]
Description of power co-generation agreement	The Carseland facility has a power co-generation agreement, expiring on December 31, 2026, which provides 60 megawatt-hours of power per hour.

Commitments - Summary of Minimu

Commitments - Summary of Minimum Future Commitments Under Contractual Agreements (Detail) $ in Millions	Dec. 31, 2020USD ($)
Disclosure of commitments [Line Items]
Lease Commitments	$ 1,305
Long-term debt	15,795
Purchase Commitments	2,239
Capital Commitments	110
Other Commitments	430
Total	19,879
Not later than one year [Member]
Disclosure of commitments [Line Items]
Lease Commitments	281
Long-term debt	434
Purchase Commitments	1,268
Capital Commitments	87
Other Commitments	132
Total	2,202
Later than one year and not later than three years [Member]
Disclosure of commitments [Line Items]
Lease Commitments	408
Long-term debt	2,378
Purchase Commitments	757
Capital Commitments	16
Other Commitments	118
Total	3,677
Later than three years and not later than five years [Member]
Disclosure of commitments [Line Items]
Lease Commitments	233
Long-term debt	2,498
Purchase Commitments	72
Capital Commitments	6
Other Commitments	53
Total	2,862
Over 5 years [Member]
Disclosure of commitments [Line Items]
Lease Commitments	383
Long-term debt	10,485
Purchase Commitments	142
Capital Commitments	1
Other Commitments	127
Total	$ 11,138

Related Party Transactions - Co

Related Party Transactions - Compensation to Key Management Personnel (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of transactions between related parties [abstract]
Salaries and other short-term benefits	$ 16	$ 15
Share-based compensation	26	31
Post-employment benefits	2	3
Termination benefits	0	12
Total	$ 44	$ 61