Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 420	$ 306	$ 693	$ 572
Less: net income attributable to continuing noncontrolling interest	0	1	0	1
Net income attributable to LKQ stockholders	420	305	693	571
Other comprehensive (loss) income:
Foreign currency translation, net of tax	(150)	22	(204)	(3)
Net change in unrealized gains/losses on cash flow hedges, net of tax	0	0	0	1
Net change in unrealized gains/losses on pension plans, net of tax	0	1	0	1
Other comprehensive income (loss) from unconsolidated subsidiaries	1	2	2	(1)
Other comprehensive (loss) income	(149)	25	(202)	(2)
Comprehensive income	271	331	491	570
Less: comprehensive income attributable to continuing noncontrolling interest	0	1	0	1
Comprehensive income attributable to LKQ stockholders	$ 271	$ 330	$ 491	$ 569