Consolidated Statements of Stockholders' Equity - USD ($) shares in Millions, $ in Millions	Total	Common Stock	Treasury Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interest
Balance as of January 1, 2025 at Dec. 31, 2023		323.1
Balance as of January 1, 2025 at Dec. 31, 2023	$ 6,181	$ 3	$ (2,424)	$ 1,538	$ 7,290	$ (240)	$ 14
Balance as of January 1, 2025 at Dec. 31, 2023			(55.9)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	158				158
Other comprehensive income (loss)	(58)					(58)
Purchase of treasury stock			(0.6)
Purchase of treasury stock	(30)		$ (30)
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	8			8
Dividends declared to LKQ stockholders	(81)				(81)
Balance as of March 31, 2025 at Mar. 31, 2024		323.5
Balance as of March 31, 2025 at Mar. 31, 2024	6,173	$ 3	$ (2,454)	1,541	7,367	(298)	14
Balance as of January 1, 2025 at Mar. 31, 2024			(56.5)
Balance as of January 1, 2025 at Dec. 31, 2024		323.6
Balance as of January 1, 2025 at Dec. 31, 2024	$ 6,032	$ 3	$ (2,787)	1,556	7,662	(417)	15
Balance as of January 1, 2025 at Dec. 31, 2024	(64.5)		(64.5)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 169				169
Other comprehensive income (loss)	104					104
Purchase of treasury stock			(1.0)
Purchase of treasury stock	(40)		$ (40)
Vesting of restricted stock units, net of shares withheld for employee tax		0.2
Vesting of restricted stock units, net of shares withheld for employee tax	(6)			(6)
Stock-based compensation expense	8			8
Dividends declared to LKQ stockholders	(78)				(78)
Balance as of March 31, 2025 at Mar. 31, 2025		323.8
Balance as of March 31, 2025 at Mar. 31, 2025	$ 6,189	$ 3	$ (2,827)	$ 1,558	$ 7,753	$ (313)	$ 15
Balance as of January 1, 2025 at Mar. 31, 2025	(65.5)		(65.5)