Cover Page - USD ($)	12 Months Ended
	Dec. 31, 2021	Feb. 18, 2022	Jun. 30, 2021
Cover [Abstract]
Document Type	10-K
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.
Amendment Flag	false
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Entity Central Index Key	0001175454