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Debt - Public Debt (Details) - USD ($)
217 Months Ended
Apr. 06, 2020
Apr. 06, 2020
Mar. 25, 2020
May 05, 2020
May 06, 2020
Apr. 24, 2020
Apr. 22, 2020
Mar. 31, 2020
Feb. 07, 2020
Debt Instrument [Line Items]                  
Maximum borrowing capacity               $ 250,000,000  
Subsequent Event                  
Debt Instrument [Line Items]                  
Early termination premium   $ 35,000,000   $ 35,000,000          
Interest expense   $ 17,000,000   $ 4,000,000          
6.125% Notes, due 2028                  
Debt Instrument [Line Items]                  
Long-term debt, interest rate (percentage)               6.125%  
6.125% Notes, due 2028 | Senior Notes                  
Debt Instrument [Line Items]                  
Aggregate principal amount                 $ 600,000,000
Long-term debt, interest rate (percentage)                 6.125%
Senior secured first-lien term loan B facility | Line of Credit | Secured Debt                  
Debt Instrument [Line Items]                  
Maximum borrowing capacity     $ 600,000,000            
Debt term     7 years            
Mandatory repayment percentage (percent)     1.00%            
Borrowing increments subject to fixed mandatory repayment percentage     $ 6,000,000            
Senior secured first-lien term loan B facility | Line of Credit | Secured Debt | London Interbank Offered Rate (LIBOR)                  
Debt Instrument [Line Items]                  
Basis spread (percentage     2.75%            
6.150% Notes, due 2020                  
Debt Instrument [Line Items]                  
Long-term debt, interest rate (percentage)               6.15%  
6.150% Notes, due 2020 | Subsequent Event                  
Debt Instrument [Line Items]                  
Long-term debt, interest rate (percentage) 6.15% 6.15%              
Early redemption of debt $ 1,000,000,000                
Payment for early redemption of debt $ 1,020,000,000                
5.400% Notes due 2021                  
Debt Instrument [Line Items]                  
Long-term debt, interest rate (percentage)               5.40%  
5.400% Notes due 2021 | Subsequent Event                  
Debt Instrument [Line Items]                  
Long-term debt, interest rate (percentage) 5.40% 5.40%   5.40%     5.40%    
Early redemption of debt $ 300,000,000                
Payment for early redemption of debt $ 315,000,000                
Cash tender offer and consent solicitation for debt             $ 785,000,000    
Amount of debt tendered       $ 561,000,000          
6.875% Notes Due 2025 | Subsequent Event                  
Debt Instrument [Line Items]                  
Aggregate principal amount           $ 1,200,000,000      
Long-term debt, interest rate (percentage)           6.875%      
Deferred financing costs           $ 15,000,000      
5.870% Notes, due 2022                  
Debt Instrument [Line Items]                  
Long-term debt, interest rate (percentage)               5.87%  
5.870% Notes, due 2022 | Subsequent Event                  
Debt Instrument [Line Items]                  
Long-term debt, interest rate (percentage)       5.87%     5.87%    
Cash tender offer and consent solicitation for debt       $ 210,000,000 $ 300,000,000   $ 210,000,000    
Amount of debt tendered       $ 147,000,000