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Long-Term Debt - Other Debt - Additional Information (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Apr. 03, 2018
Debt Instrument [Line Items]          
Interest paid on borrowings $ 101,000,000 $ 222,000,000 $ 304,000,000 $ 486,000,000  
ABL Facility          
Debt Instrument [Line Items]          
Line of credit facility, maximum borrowing capacity 762,000,000   762,000,000   $ 1,000,000,000.0
Line of credit facility, excess availability 642,000,000   642,000,000    
Line of credit outstanding amount 0   0    
ABL Facility | ABL Facility Customary Covenants          
Debt Instrument [Line Items]          
Line of credit facility, maximum borrowing capacity 95,000,000   $ 95,000,000    
Debt instrument variable interest rate     10.00%    
ABL Facility | Letter of Credit          
Debt Instrument [Line Items]          
Line of credit outstanding amount $ 120,000,000   $ 120,000,000    
Reduction in letters of credit     $ 30,000,000