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Other Assets and Investments (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended 9 Months Ended
Sep. 30, 2020
Jun. 30, 2020
Sep. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2019
Accounts Notes And Loans Receivable [Line Items]                
Equity method investment, loss $ (3)   $ (90) $ 1,320 $ (12) $ 1,317 $ (102)  
Trade receivable from a customer refinanced 29         29    
TireHub                
Accounts Notes And Loans Receivable [Line Items]                
Non-cash impairment charge   $ 148            
United States | TireHub                
Accounts Notes And Loans Receivable [Line Items]                
Equity method investments $ 85         $ 85   $ 262
Equity ownership percentage 50.00%         50.00%    
Equity method investment, loss $ 4   $ 4     $ 30 $ 29  
United States | TireHub | Other Assets                
Accounts Notes And Loans Receivable [Line Items]                
Loan receivable, outstanding $ 36         $ 36