v3.20.2
Debt Fair Value (Details) - USD ($)
6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Mar. 25, 2020
Feb. 07, 2020
Feb. 05, 2020
Debt Instrument [Line Items]          
Payments on debt (original maturities greater than three months) (M) $ 1,100,000,000 $ 0      
Debt instrument, face amount         $ 1,200,000,000
Senior Secured Notes | Second-Lien Notes due 2028, 6.125%          
Debt Instrument [Line Items]          
Debt, carrying value $ 1,276,000,000        
Debt instrument, face amount       $ 600,000,000  
Revolving Credit Facility | Senior Secured Credit Facility | First-Lien Revolving Credit Facility          
Debt Instrument [Line Items]          
Debt instrument, face amount     $ 1,000