| Cover Page - USD ($) | 12 Months Ended | ||
| Dec. 31, 2021 | Feb. 18, 2022 | Jun. 30, 2021 | |
| Cover [Abstract] | |||
| Document Type | 10-K/A | ||
| Document Annual Report | true | ||
| Document Period End Date | Dec. 31, 2021 | ||
| Current Fiscal Year End Date | --12-31 | ||
| Document Transition Report | false | ||
| Entity File Number | 001-35004 | ||
| Entity Registrant Name | FLEETCOR Technologies, Inc. | ||
| Entity Incorporation, State or Country Code | DE | ||
| Entity Tax Identification Number | 72-1074903 | ||
| Entity Address, Address Line One | 3280 Peachtree Road, Suite 2400, | ||
| Entity Address, City or Town | Atlanta, | ||
| Entity Address, State or Province | GA | ||
| Entity Address, Postal Zip Code | 30305 | ||
| City Area Code | 770 | ||
| Local Phone Number | 449-0479 | ||
| Title of 12(b) Security | Common Stock, $0.001 par value per share | ||
| Trading Symbol | FLT | ||
| Security Exchange Name | NYSE | ||
| Entity Well-know Seasoned Issuer | Yes | ||
| Entity Voluntary Filers | No | ||
| Entity Current Reporting Status | Yes | ||
| Entity Interactive Data Current | Yes | ||
| Entity Filer Category | Large Accelerated Filer | ||
| Entity Small Business | false | ||
| Entity Emerging Growth Company | false | ||
| ICFR Auditor Attestation Flag | true | ||
| Entity Shell Company | false | ||
| Entity Public Float | $ 20,626,107,735 | ||
| Entity Common Stock, Shares Outstanding | 77,886,595 | ||
| Documents Incorporated by Reference | Portions of the registrant’s definitive Proxy Statement to be delivered to shareholders in connection with the Annual Meeting of Shareholders to be held on June 9, 2022 are incorporated by reference into Part III of this report. Audit Firm ID: 42 Auditor Name: Ernst & Young LLP Auditor Location: Atlanta, Georgia | ||
| Amendment Flag | false | ||
| Document Fiscal Year Focus | 2021 | ||
| Document Fiscal Period Focus | FY | ||
| Entity Central Index Key | 0001175454 |
| Audit Information | 12 Months Ended |
| Dec. 31, 2021 | |
| Audit Information [Abstract] | |
| Auditor Firm ID | 42 |
| Auditor Name | Ernst & Young LLP |
| Auditor Location | Atlanta, Georgia |
