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
Balance as of January 1, 2023 at Dec. 31, 2021		321.6
Balance as of January 1, 2023 at Dec. 31, 2021	$ 5,787	$ 3	$ (1,346)	$ 1,474	$ 5,794	$ (153)	$ 15
Balance as of January 1, 2023 at Dec. 31, 2021			(34.6)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	273				273
Other comprehensive income	(53)					(53)
Purchase of treasury stock			(2.7)
Purchase of treasury stock	(144)		$ (144)
Vesting of restricted stock units, net of shares withheld for employee tax		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	(72)				(72)
Balance as of March 31, 2023 at Mar. 31, 2022		322.0
Balance as of March 31, 2023 at Mar. 31, 2022	5,799	$ 3	$ (1,490)	1,482	5,995	(206)	15
Balance as of March 31, 2023 at Mar. 31, 2022			(37.3)
Balance as of January 1, 2023 at Dec. 31, 2022		322.4
Balance as of January 1, 2023 at Dec. 31, 2022	$ 5,467	$ 3	$ (2,389)	1,506	6,656	(323)	14
Balance as of January 1, 2023 at Dec. 31, 2022	55.1		(55.1)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 270				270
Other comprehensive income	43					43
Purchase of treasury stock			(0.1)
Purchase of treasury stock	(5)		$ (5)
Vesting of restricted stock units, net of shares withheld for employee tax		0.4
Vesting of restricted stock units, net of shares withheld for employee tax	(6)			(6)
Stock-based compensation expense	10			10
Dividends declared to LKQ stockholders	(74)				(74)
Balance as of March 31, 2023 at Mar. 31, 2023		322.8
Balance as of March 31, 2023 at Mar. 31, 2023	$ 5,705	$ 3	$ (2,394)	$ 1,510	$ 6,852	$ (280)	$ 14
Balance as of March 31, 2023 at Mar. 31, 2023	55.2		(55.2)