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Restructuring and Transaction Related Expenses (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	$ 55	$ 2	$ 91	$ 10
Business Combination, Acquisition Related Costs		6	2	16
Disposal Group, Including Discontinued Operation, Other Assets	46		46
Disposal Group, Including Discontinued Operation, Other Liabilities	$ 46		$ 46
Mekonomen [Member]
Restructuring Cost and Reserve [Line Items]
Equity Method Investment, Ownership Percentage	26.60%		26.60%
2024 Global Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	$ 43	0	$ 70	0
Restructuring and Related Cost, Cost Incurred to Date	70		70
2024 Global Restructuring \| Employee related costs
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	3	0	3	0
2024 Global Restructuring \| Inventory Related Costs
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	6	0	14	0
2024 Global Restructuring \| Asset Impairments
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	29	0	46	0
2024 Global Restructuring \| Other Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	5	0	7	0
2024 Global Restructuring \| Maximum
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	100		100
2024 Global Restructuring \| Minimum [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	80		80
2022 Global Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	1	2	2	7
Restructuring and Related Cost, Cost Incurred to Date	27		27
2022 Global Restructuring \| Employee related costs
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	1	0	1	2
2022 Global Restructuring \| Facility Closing
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	0	1	1	3
2022 Global Restructuring \| Other Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	0	1	0	2
2022 Global Restructuring \| Maximum
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	32		32
2022 Global Restructuring \| Minimum [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	28		28
1 LKQ Europe Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	1	0	3	1
Restructuring and Related Cost, Cost Incurred to Date	13		13
1 LKQ Europe Program [Member] \| Employee related costs
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	1	0	2	1
1 LKQ Europe Program [Member] \| Facility Closing
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	0	0	1	0
1 LKQ Europe Program [Member] \| Maximum
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	40		40
1 LKQ Europe Program [Member] \| Minimum [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	30		30
Acquisition integration plans
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	10	0	16	2
Restructuring and Related Cost, Expected Cost Remaining	5		5
Acquisition integration plans \| Employee related costs
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	3	0	4	0
Acquisition integration plans \| Facility Closing
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	5	0	9	2
Acquisition integration plans \| Other Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	2	$ 0	3	$ 0
Wholesale - North America Segment \| 2024 Global Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	10		10
Wholesale - North America Segment \| 2022 Global Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	2		2
Wholesale - North America Segment \| 1 LKQ Europe Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	0		0
Europe \| 2024 Global Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	60		60
Europe \| 2022 Global Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	18		18
Europe \| 1 LKQ Europe Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	13		13
Specialty [Member] \| 2024 Global Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	0		0
Specialty [Member] \| 2022 Global Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	4		4
Specialty [Member] \| 1 LKQ Europe Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	0		0
Self Service Segment \| 2024 Global Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	0		0
Self Service Segment \| 2022 Global Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	3		3
Self Service Segment \| 1 LKQ Europe Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	$ 0		$ 0