Financing arrangements (Principal Amounts and Carrying Value of Long-term Borrowings) (Details) | Mar. 31, 2023 USD ($) | Mar. 31, 2023 EUR (€) | Mar. 31, 2023 GBP (£) | Mar. 31, 2023 CHF (SFr) | Dec. 31, 2022 USD ($) |
Debt Instrument [Line Items] | | | | | |
Unamortized bond discounts, premiums and issuance costs, net | $ (1,434,000,000) | | | | $ (1,246,000,000) |
Fair value adjustments | (343,000,000) | | | | (437,000,000) |
Other | 12,000,000 | | | | 12,000,000 |
Total carrying value of debt | 61,595,000,000 | | | | 38,945,000,000 |
Less current portion | (834,000,000) | | | | (1,591,000,000) |
Total long-term debt | 60,761,000,000 | | | | 37,354,000,000 |
Face amount | $ 24,000,000,000 | | | | |
Notes | 0.41% CHF700 million bonds due 2023 (0.41% 2023 Swiss franc Bonds) | | | | | |
Debt Instrument [Line Items] | | | | | |
Interest rate, stated percentage | 0.41% | 0.41% | 0.41% | 0.41% | |
Long-term debt, gross | | | | | 757,000,000 |
Face amount | SFr | | | | SFr 700,000,000 | |
Notes | 2.25% notes due 2023 (2.25% 2023 Notes) [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Interest rate, stated percentage | 2.25% | 2.25% | 2.25% | 2.25% | |
Long-term debt, gross | $ 750,000,000 | | | | 750,000,000 |
Notes | 3.625% notes due 2024 (3.625% 2024 Notes) [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Interest rate, stated percentage | 3.625% | 3.625% | 3.625% | 3.625% | |
Long-term debt, gross | $ 1,400,000,000 | | | | 1,400,000,000 |
Notes | 1.90% notes due 2025 (1.90% 2025 Notes) [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Interest rate, stated percentage | 1.90% | 1.90% | 1.90% | 1.90% | |
Long-term debt, gross | $ 500,000,000 | | | | 500,000,000 |
Notes | 5.25% notes due 2025 (5.25% 2025 Notes) [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Interest rate, stated percentage | 5.25% | 5.25% | 5.25% | 5.25% | |
Long-term debt, gross | $ 2,000,000,000 | | | | |
Face amount | $ 2,000,000,000 | | | | |
Notes | 3.125% notes due 2025 (3.125% 2025 Notes) [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Interest rate, stated percentage | 3.125% | 3.125% | 3.125% | 3.125% | |
Long-term debt, gross | $ 1,000,000,000 | | | | 1,000,000,000 |
Notes | 2.00% €750 million notes due 2026 (2.00% 2026 euro Notes) | | | | | |
Debt Instrument [Line Items] | | | | | |
Interest rate, stated percentage | 2% | 2% | 2% | 2% | |
Long-term debt, gross | $ 813,000,000 | | | | 803,000,000 |
Face amount | € | | € 750,000,000 | | | |
Notes | 5.507% notes due 2026 (5.507% 2026 Notes) [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Interest rate, stated percentage | 5.507% | 5.507% | 5.507% | 5.507% | |
Long-term debt, gross | $ 1,500,000,000 | | | | |
Face amount | $ 1,500,000,000 | | | | |
Notes | 2.60% notes due 2026 (2.60% 2026 notes) [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Interest rate, stated percentage | 2.60% | 2.60% | 2.60% | 2.60% | |
Long-term debt, gross | $ 1,250,000,000 | | | | 1,250,000,000 |
Notes | 5.50% £475 million notes due 2026 (5.50% 2026 pound sterling Notes) | | | | | |
Debt Instrument [Line Items] | | | | | |
Interest rate, stated percentage | 5.50% | 5.50% | 5.50% | 5.50% | |
Long-term debt, gross | $ 586,000,000 | | | | 574,000,000 |
Face amount | £ | | | £ 475,000,000 | | |
Notes | 2.20% notes due 2027 (2.20% 2027 Notes) [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Interest rate, stated percentage | 2.20% | 2.20% | 2.20% | 2.20% | |
Long-term debt, gross | $ 1,724,000,000 | | | | 1,724,000,000 |
Notes | 3.20% notes due 2027 (3.20% 2027 Notes) [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Interest rate, stated percentage | 3.20% | 3.20% | 3.20% | 3.20% | |
Long-term debt, gross | $ 1,000,000,000 | | | | 1,000,000,000 |
Notes | 5.15% notes due 2028 (5.15% 2028 Notes) [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Interest rate, stated percentage | 5.15% | 5.15% | 5.15% | 5.15% | |
Long-term debt, gross | $ 3,750,000,000 | | | | 0 |
Face amount | $ 3,750,000,000 | | | | |
Notes | 1.65% notes due 2028 (1.65% 2028 Notes) [Member} | | | | | |
Debt Instrument [Line Items] | | | | | |
Interest rate, stated percentage | 1.65% | 1.65% | 1.65% | 1.65% | |
Long-term debt, gross | $ 1,234,000,000 | | | | 1,234,000,000 |
Notes | 3.00% 2029 Notes [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Interest rate, stated percentage | 3% | 3% | 3% | 3% | |
Long-term debt, gross | $ 750,000,000 | | | | 750,000,000 |
Notes | 4.05% 2029 Notes [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Interest rate, stated percentage | 4.05% | 4.05% | 4.05% | 4.05% | |
Long-term debt, gross | $ 1,250,000,000 | | | | 1,250,000,000 |
Notes | 4.00% £700 million notes due 2029 (4.00% 2029 pound sterling Notes) | | | | | |
Debt Instrument [Line Items] | | | | | |
Interest rate, stated percentage | 4% | 4% | 4% | 4% | |
Long-term debt, gross | $ 864,000,000 | | | | 846,000,000 |
Face amount | £ | | | £ 700,000,000 | | |
Notes | 2.45% notes due 2030 (2.45% 2030 Notes) [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Interest rate, stated percentage | 2.45% | 2.45% | 2.45% | 2.45% | |
Long-term debt, gross | $ 1,250,000,000 | | | | 1,250,000,000 |
Notes | 5.25% notes due 2030 (5.25% 2030 Notes) [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Interest rate, stated percentage | 5.25% | 5.25% | 5.25% | 5.25% | |
Long-term debt, gross | $ 2,750,000,000 | | | | |
Face amount | $ 2,750,000,000 | | | | |
Notes | 2.30% notes due 2031 (2.30% 2031 Notes) [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Interest rate, stated percentage | 2.30% | 2.30% | 2.30% | 2.30% | |
Long-term debt, gross | $ 1,250,000,000 | | | | 1,250,000,000 |
Notes | 2.00% notes due 2032 (2.00% 2032 Notes) [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Interest rate, stated percentage | 2% | 2% | 2% | 2% | |
Long-term debt, gross | $ 1,001,000,000 | | | | 1,051,000,000 |
Notes | 3.35% 2032 Notes [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Interest rate, stated percentage | 3.35% | 3.35% | 3.35% | 3.35% | |
Long-term debt, gross | $ 1,000,000,000 | | | | 1,000,000,000 |
Notes | 4.20% 2033 Notes [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Interest rate, stated percentage | 4.20% | 4.20% | 4.20% | 4.20% | |
Long-term debt, gross | $ 750,000,000 | | | | 750,000,000 |
Notes | 5.25% notes due 2033 (5.25% 2033 Notes) [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Interest rate, stated percentage | 5.25% | 5.25% | 5.25% | 5.25% | |
Long-term debt, gross | $ 4,250,000,000 | | | | 0 |
Face amount | $ 4,250,000,000 | | | | |
Notes | 6.375% notes due 2037 (6.375% 2037 Notes) [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Interest rate, stated percentage | 6.375% | 6.375% | 6.375% | 6.375% | |
Long-term debt, gross | $ 478,000,000 | | | | 478,000,000 |
Notes | 6.90% notes due 2038 (6.90% 2038 Notes) [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Interest rate, stated percentage | 6.90% | 6.90% | 6.90% | 6.90% | |
Long-term debt, gross | $ 254,000,000 | | | | 254,000,000 |
Notes | 6.40% notes due 2039 (6.40% 2039 Notes) [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Interest rate, stated percentage | 6.40% | 6.40% | 6.40% | 6.40% | |
Long-term debt, gross | $ 333,000,000 | | | | 333,000,000 |
Notes | 3.15% notes due 2040 (3.15% 2040 Notes) [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Interest rate, stated percentage | 3.15% | 3.15% | 3.15% | 3.15% | |
Long-term debt, gross | $ 1,803,000,000 | | | | 2,000,000,000 |
Notes | 5.75% notes due 2040 (5.75% 2040 Notes) [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Interest rate, stated percentage | 5.75% | 5.75% | 5.75% | 5.75% | |
Long-term debt, gross | $ 373,000,000 | | | | 373,000,000 |
Notes | 2.80% notes due 2041 (2.80% 2041 Notes) [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Interest rate, stated percentage | 2.80% | 2.80% | 2.80% | 2.80% | |
Long-term debt, gross | $ 1,091,000,000 | | | | 1,110,000,000 |
Notes | 4.95% notes due 2041 (4.95% 2041 Notes) [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Interest rate, stated percentage | 4.95% | 4.95% | 4.95% | 4.95% | |
Long-term debt, gross | $ 600,000,000 | | | | 600,000,000 |
Notes | 5.15% notes due 2041 (5.15% 2041 Notes) [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Interest rate, stated percentage | 5.15% | 5.15% | 5.15% | 5.15% | |
Long-term debt, gross | $ 729,000,000 | | | | 729,000,000 |
Notes | 5.65% notes due 2042 (5.65% 2042 Notes) [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Interest rate, stated percentage | 5.65% | 5.65% | 5.65% | 5.65% | |
Long-term debt, gross | $ 415,000,000 | | | | 415,000,000 |
Notes | 5.60% notes due 2043 (5.60% 2043 Notes) [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Interest rate, stated percentage | 5.60% | 5.60% | 5.60% | 5.60% | |
Long-term debt, gross | $ 2,750,000,000 | | | | 0 |
Face amount | $ 2,750,000,000 | | | | |
Notes | 5.375% notes due 2043 (5.375% 2043 Notes) [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Interest rate, stated percentage | 5.375% | 5.375% | 5.375% | 5.375% | |
Long-term debt, gross | $ 185,000,000 | | | | 185,000,000 |
Notes | 4.40% notes due 2045 (4.40% 2045 Notes) [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Interest rate, stated percentage | 4.40% | 4.40% | 4.40% | 4.40% | |
Long-term debt, gross | $ 2,250,000,000 | | | | 2,250,000,000 |
Notes | 4.563% notes due 2048 (4.563% 2048 Notes) [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Interest rate, stated percentage | 4.563% | 4.563% | 4.563% | 4.563% | |
Long-term debt, gross | $ 1,415,000,000 | | | | 1,415,000,000 |
Notes | 3.375% notes due 2050 (3.375% 2050 Notes) [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Interest rate, stated percentage | 3.375% | 3.375% | 3.375% | 3.375% | |
Long-term debt, gross | $ 2,132,000,000 | | | | 2,250,000,000 |
Notes | 4.663% notes due 2051 (4.663% 2051 Notes) [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Interest rate, stated percentage | 4.663% | 4.663% | 4.663% | 4.663% | |
Long-term debt, gross | $ 3,541,000,000 | | | | 3,541,000,000 |
Notes | 3.00% notes due 2052 (3.00% 2052 Notes) | | | | | |
Debt Instrument [Line Items] | | | | | |
Interest rate, stated percentage | 3% | 3% | 3% | 3% | |
Long-term debt, gross | $ 1,199,000,000 | | | | 1,254,000,000 |
Notes | 4.20% 2052 Notes [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Interest rate, stated percentage | 4.20% | 4.20% | 4.20% | 4.20% | |
Long-term debt, gross | $ 950,000,000 | | | | 1,000,000,000 |
Notes | 4.875% 2053 Notes [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Interest rate, stated percentage | 4.875% | 4.875% | 4.875% | 4.875% | |
Long-term debt, gross | $ 1,000,000,000 | | | | 1,000,000,000 |
Notes | 5.65% notes due 2053 (5.65% 2053 Notes) [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Interest rate, stated percentage | 5.65% | 5.65% | 5.65% | 5.65% | |
Long-term debt, gross | $ 4,250,000,000 | | | | 0 |
Face amount | $ 4,250,000,000 | | | | |
Notes | 2.77% notes due 2053 (2.77% 2053 Notes) {Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Interest rate, stated percentage | 2.77% | 2.77% | 2.77% | 2.77% | |
Long-term debt, gross | $ 940,000,000 | | | | 940,000,000 |
Notes | 4.40% 2062 Notes [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Interest rate, stated percentage | 4.40% | 4.40% | 4.40% | 4.40% | |
Long-term debt, gross | $ 1,200,000,000 | | | | 1,250,000,000 |
Notes | 5.75% notes due 2063 (5.75% 2063 Notes) [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Interest rate, stated percentage | 5.75% | 5.75% | 5.75% | 5.75% | |
Long-term debt, gross | $ 2,750,000,000 | | | | 0 |
Face amount | 2,750,000,000 | | | | |
Notes | Other notes due 2097 [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Long-term debt, gross | $ 100,000,000 | | | | $ 100,000,000 |