Reconciliation Of Segment EBITDA To Net Income (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Reconciliation of Segment Earnings Before Interest Taxes Depreciation And Amortization to Net Income Table [Line Items]
Net income	$ 282	$ 420	$ 552	$ 693
Less: net income attributable to continuing noncontrolling interest	1	0	1	0
Net income attributable to LKQ stockholders	281	420	551	693
Less: net income from discontinued operations	0	0	0	(4)
Net income from continuing operations attributable to LKQ stockholders	281	420	551	689
Depreciation and amortization	70	68	135	133
Interest expense, net of interest income	42	14	75	29
Loss on debt extinguishment	0	0	1	0
Provision for income taxes	109	127	203	216
Equity in earnings of unconsolidated subsidiaries (1)	(2)	(4)	(5)	(6)
Equity investment fair value adjustments	0	2	1	3
Restructuring and transaction related expenses (3)	8	4	26	7
Gain on disposal of businesses	0	(155)	0	(155)
Losses on previously held equity interests	0	0	0	1
Direct impacts of Ukraine/Russia conflict (4)	0	(1)	0	5
Segment EBITDA	485	475	941	922
Forward Contracts
Reconciliation of Segment Earnings Before Interest Taxes Depreciation And Amortization to Net Income Table [Line Items]
Gains on foreign exchange contracts - acquisition related	$ (23)	$ 0	$ (46)	$ 0