Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies - Narrative (Details)

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Commitments and Contingencies - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Jun. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Loss Contingencies [Line Items]            
Litigation reserves $ 5     $ 5   $ 4
Litigation receivable covered by insurance 3     3   $ 0
Impairments, net 0 $ 0   0 $ 206  
Contract Termination            
Loss Contingencies [Line Items]            
Impairments, net     $ 4      
Maximum            
Loss Contingencies [Line Items]            
Range of possible loss, portion not accrued (up to) $ 11     $ 11