Consolidated Statements of Stockholders' Equity - USD ($) shares in Millions, $ in Millions	Total	Common Stock	Treasury Stock, Common [Member]	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interest
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance as of January 1, 2022			(17.3)
Balance as of January 1, 2022 at Dec. 31, 2020		320.9
Balance as of January 1, 2022 at Dec. 31, 2020	$ 5,671	$ 3	$ (469)	$ 1,444	$ 4,776	$ (99)	$ 16
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	266
Other comprehensive loss	(27)
Purchase of treasury stock			1.5
Purchase of treasury stock	(57)		$ (57)
Restricted Stock Units Vested Shares Net Of Tax Withholdings		0.3
Vesting of restricted stock units, net of shares withheld for employee tax	(2)	$ 0		(2)
Stock-based compensation expense	8			8
Balance as of March 31, 2022 at Mar. 31, 2021			(18.8)
Balance as of March 31, 2022 at Mar. 31, 2021		321.2
Balance as of March 31, 2022 at Mar. 31, 2021	5,859	$ 3	$ (526)	1,450	5,042	(126)	16
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance as of January 1, 2022			(18.8)
Balance as of January 1, 2022			(34.6)
Balance as of January 1, 2022 at Dec. 31, 2021		321.6
Balance as of January 1, 2022 at Dec. 31, 2021	5,787	$ 3	$ (1,346)	1,474	5,794	(153)	15
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	273				273
Other comprehensive loss	(53)					(53)
Purchase of treasury stock			(2.7)
Purchase of treasury stock	(144)		$ (144)
Restricted Stock Units Vested Shares Net Of Tax Withholdings		0.4
Vesting of restricted stock units, net of shares withheld for employee tax	(5)			(5)
Stock-based compensation expense	13			13
Dividends declared to LKQ stockholders ($0.25 per share)	72				72
Balance as of March 31, 2022 at Mar. 31, 2022			(37.3)
Balance as of March 31, 2022 at Mar. 31, 2022		322.0
Balance as of March 31, 2022 at Mar. 31, 2022	$ 5,799	$ 3	$ (1,490)	$ 1,482	$ 5,995	$ (206)	$ 15
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance as of January 1, 2022			(37.3)