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Restructuring and Transaction Related Expenses (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Dec. 31, 2022
Restructuring Cost and Reserve [Line Items]      
Business Combination, Acquisition Related Costs $ 10 $ 3  
Restructuring Costs 8 0  
Professional Fees      
Restructuring Cost and Reserve [Line Items]      
Business Combination, Acquisition Related Costs 10 3  
1 LKQ Europe Program [Member]      
Restructuring Cost and Reserve [Line Items]      
Restructuring Costs 1 0  
Restructuring and Related Cost, Cost Incurred to Date 8    
Restructuring Reserve 1   $ 1
1 LKQ Europe Program [Member] | Employee related costs      
Restructuring Cost and Reserve [Line Items]      
Restructuring Costs 1 0  
Restructuring Reserve 1   1
1 LKQ Europe Program [Member] | Facility Closing      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve 0   0
1 LKQ Europe Program [Member] | Other Restructuring      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve 0   0
1 LKQ Europe Program [Member] | Maximum      
Restructuring Cost and Reserve [Line Items]      
Restructuring and Related Cost, Expected Cost 40    
1 LKQ Europe Program [Member] | Minimum [Member]      
Restructuring Cost and Reserve [Line Items]      
Restructuring and Related Cost, Expected Cost 30    
2022 Global Restructuring      
Restructuring Cost and Reserve [Line Items]      
Restructuring Costs 5 0  
Restructuring and Related Cost, Cost Incurred to Date 15    
Restructuring Reserve 5   4
2022 Global Restructuring | Employee related costs      
Restructuring Cost and Reserve [Line Items]      
Restructuring Costs 2 0  
Restructuring Reserve 1   3
2022 Global Restructuring | Facility Closing      
Restructuring Cost and Reserve [Line Items]      
Restructuring Costs 2 0  
Restructuring Reserve 4   1
2022 Global Restructuring | Other Restructuring      
Restructuring Cost and Reserve [Line Items]      
Restructuring Costs 1 0  
Restructuring Reserve 0   0
2022 Global Restructuring | Maximum      
Restructuring Cost and Reserve [Line Items]      
Restructuring and Related Cost, Expected Cost 40    
2022 Global Restructuring | Minimum [Member]      
Restructuring Cost and Reserve [Line Items]      
Restructuring and Related Cost, Expected Cost 30    
2019/2020 Global Restructuring      
Restructuring Cost and Reserve [Line Items]      
Restructuring and Related Cost, Cost Incurred to Date 106    
Restructuring Reserve 5   9
2019/2020 Global Restructuring | Employee related costs      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve 0   1
2019/2020 Global Restructuring | Facility Closing      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve 3   6
2019/2020 Global Restructuring | Other Restructuring      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve 2   $ 2
2019/2020 Global Restructuring | Maximum      
Restructuring Cost and Reserve [Line Items]      
Restructuring and Related Cost, Expected Cost 115    
2019/2020 Global Restructuring | Minimum [Member]      
Restructuring Cost and Reserve [Line Items]      
Restructuring and Related Cost, Expected Cost 108    
Acquisition integration plans      
Restructuring Cost and Reserve [Line Items]      
Restructuring Costs 2 0  
Acquisition integration plans | Facility Closing      
Restructuring Cost and Reserve [Line Items]      
Restructuring Costs 2 $ 0  
Specialty [Member] | 1 LKQ Europe Program [Member]      
Restructuring Cost and Reserve [Line Items]      
Restructuring and Related Cost, Cost Incurred to Date 0    
Specialty [Member] | 2022 Global Restructuring      
Restructuring Cost and Reserve [Line Items]      
Restructuring and Related Cost, Cost Incurred to Date 2    
Specialty [Member] | 2019/2020 Global Restructuring      
Restructuring Cost and Reserve [Line Items]      
Restructuring and Related Cost, Cost Incurred to Date 2    
Europe | 1 LKQ Europe Program [Member]      
Restructuring Cost and Reserve [Line Items]      
Restructuring and Related Cost, Cost Incurred to Date 8    
Europe | 2022 Global Restructuring      
Restructuring Cost and Reserve [Line Items]      
Restructuring and Related Cost, Cost Incurred to Date 11    
Europe | 2019/2020 Global Restructuring      
Restructuring Cost and Reserve [Line Items]      
Restructuring and Related Cost, Cost Incurred to Date 59    
Self Service Segment | 1 LKQ Europe Program [Member]      
Restructuring Cost and Reserve [Line Items]      
Restructuring and Related Cost, Cost Incurred to Date 0    
Self Service Segment | 2022 Global Restructuring      
Restructuring Cost and Reserve [Line Items]      
Restructuring and Related Cost, Cost Incurred to Date 1    
Self Service Segment | 2019/2020 Global Restructuring      
Restructuring Cost and Reserve [Line Items]      
Restructuring and Related Cost, Cost Incurred to Date 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    
Wholesale - North America Segment | 2022 Global Restructuring      
Restructuring Cost and Reserve [Line Items]      
Restructuring and Related Cost, Cost Incurred to Date 1    
Wholesale - North America Segment | 2019/2020 Global Restructuring      
Restructuring Cost and Reserve [Line Items]      
Restructuring and Related Cost, Cost Incurred to Date $ 43