Restructuring and Transaction Related Expenses (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Restructuring Cost and Reserve [Line Items]
Business Combination, Acquisition Related Costs	$ 3	$ 1	$ 19	$ 5
Restructuring Costs	26	2	36	5
Professional Fees
Restructuring Cost and Reserve [Line Items]
Business Combination, Acquisition Related Costs	3	1	19	5
1 LKQ Europe Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	0	1	1	1
Restructuring and Related Cost, Cost Incurred to Date	8		8
Restructuring Reserve	1		1		$ 1
1 LKQ Europe Program [Member] | Employee related costs
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	0	1	1	1
Restructuring Reserve	1		1		1
1 LKQ Europe Program [Member] | Facility Closing
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	0		0		0
1 LKQ Europe Program [Member] | Other Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	0		0		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
2022 Global Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	6	0	13	0
Restructuring and Related Cost, Cost Incurred to Date	23		23
Restructuring Reserve	3		3		4
2022 Global Restructuring | Employee related costs
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	1	0	3	0
Restructuring Reserve	0		0		3
2022 Global Restructuring | Facility Closing
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	2	0	5	0
Restructuring Reserve	3		3		1
2022 Global Restructuring | Other Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	1	0	3	0
Restructuring Reserve	0		0		0
2022 Global Restructuring | Inventory Related Costs
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	2	0	2	0
2022 Global Restructuring | Maximum
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	35		35
2022 Global Restructuring | Minimum [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	25		25
2019/2020 Global Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	0	1	0	2
Restructuring and Related Cost, Cost Incurred to Date	106		106
Restructuring Reserve	4		4		9
2019/2020 Global Restructuring | Employee related costs
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	0		0		1
2019/2020 Global Restructuring | Facility Closing
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	0	1	0	2
Restructuring Reserve	2		2		6
2019/2020 Global Restructuring | Other Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	2		2		$ 2
2019/2020 Global Restructuring | Maximum
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	110		110
2019/2020 Global Restructuring | Minimum [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	106		106
Acquisition integration plans
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	20	0	22	2
Acquisition integration plans | Employee related costs
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	20	0	20	2
Acquisition integration plans | Facility Closing
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	0	$ 0	2	$ 0
Acquisition integration plans | Maximum
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost Remaining	25		25
Acquisition integration plans | Minimum [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost Remaining	15		15
Specialty [Member] | 1 LKQ Europe Program [Member]
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	3		3
Specialty [Member] | 2019/2020 Global Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	2		2
Europe | 1 LKQ Europe Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	8		8
Europe | 2022 Global Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	16		16
Europe | 2019/2020 Global Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	59		59
Self Service Segment | 1 LKQ Europe Program [Member]
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 | 2019/2020 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
Wholesale - North America Segment | 2022 Global Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	1		1
Wholesale - North America Segment | 2019/2020 Global Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	$ 43		$ 43