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 April 1, 2023 at Dec. 31, 2021		321.6
Balance as of April 1, 2023 at Dec. 31, 2021	$ 5,787	$ 3	$ (1,346)	$ 1,474	$ 5,794	$ (153)	$ 15
Balance as of April 1, 2023 at Dec. 31, 2021			(34.6)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	693				693
Net income attributable to continuing noncontrolling interest	0
Other comprehensive income (loss)	(202)					(202)
Purchase of treasury stock			(10.8)
Purchase of treasury stock	(548)		$ (548)
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	23			23
Dividends declared to LKQ stockholders	(143)				(143)
Balance as of June 30, 2023 at Jun. 30, 2022		322.0
Balance as of June 30, 2023 at Jun. 30, 2022	5,605	$ 3	$ (1,894)	1,492	6,344	(355)	15
Balance as of June 30, 2023 at Jun. 30, 2022			(45.4)
Balance as of April 1, 2023 at Mar. 31, 2022		322.0
Balance as of April 1, 2023 at Mar. 31, 2022	5,799	$ 3	$ (1,490)	1,482	5,995	(206)	15
Balance as of April 1, 2023 at Mar. 31, 2022			(37.3)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	420				420
Net income attributable to continuing noncontrolling interest	0
Other comprehensive income (loss)	(149)					(149)
Purchase of treasury stock			(8.1)
Purchase of treasury stock	(404)		$ (404)
Stock-based compensation expense	10			10
Dividends declared to LKQ stockholders	(71)				(71)
Balance as of June 30, 2023 at Jun. 30, 2022		322.0
Balance as of June 30, 2023 at Jun. 30, 2022	5,605	$ 3	$ (1,894)	1,492	6,344	(355)	15
Balance as of June 30, 2023 at Jun. 30, 2022			(45.4)
Balance as of April 1, 2023 at Dec. 31, 2022		322.4
Balance as of April 1, 2023 at Dec. 31, 2022	$ 5,467	$ 3	$ (2,389)	1,506	6,656	(323)	14
Balance as of April 1, 2023 at Dec. 31, 2022	55.1		(55.1)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 552				551
Net income attributable to continuing noncontrolling interest	1						1
Other comprehensive income (loss)	88					88
Purchase of treasury stock			(0.1)
Purchase of treasury stock	(5)		$ (5)
Vesting of restricted stock units, net of shares withheld for employee tax		0.5
Vesting of restricted stock units, net of shares withheld for employee tax	(6)			(6)
Stock-based compensation expense	20			20
Dividends declared to LKQ stockholders	(148)				(148)
Balance as of June 30, 2023 at Jun. 30, 2023		322.9
Balance as of June 30, 2023 at Jun. 30, 2023	$ 5,968	$ 3	$ (2,394)	1,520	7,059	(235)	15
Balance as of June 30, 2023 at Jun. 30, 2023	55.2		(55.2)
Balance as of April 1, 2023 at Mar. 31, 2023		322.8
Balance as of April 1, 2023 at Mar. 31, 2023	$ 5,705	$ 3	$ (2,394)	1,510	6,852	(280)	14
Balance as of April 1, 2023 at Mar. 31, 2023			(55.2)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	282				281
Net income attributable to continuing noncontrolling interest	1						1
Other comprehensive income (loss)	45					45
Vesting of restricted stock units, net of shares withheld for employee tax		0.1
Vesting of restricted stock units, net of shares withheld for employee tax	0			0
Stock-based compensation expense	10			10
Dividends declared to LKQ stockholders	(74)				(74)
Balance as of June 30, 2023 at Jun. 30, 2023		322.9
Balance as of June 30, 2023 at Jun. 30, 2023	$ 5,968	$ 3	$ (2,394)	$ 1,520	$ 7,059	$ (235)	$ 15
Balance as of June 30, 2023 at Jun. 30, 2023	55.2		(55.2)