Quarterly report pursuant to Section 13 or 15(d)

Debt - Schedule of Long-term Debt Instruments Additional Information (Details)

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Debt - Schedule of Long-term Debt Instruments Additional Information (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 01, 2017
Aug. 04, 2017
Jul. 27, 2017
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Jul. 31, 2017
Debt Instrument [Line Items]                  
Loss on extinguishment of debt         $ 43,679,000 $ 0 $ 43,679,000 $ 0  
Senior Secured Revolving Credit Facility                  
Debt Instrument [Line Items]                  
Credit facility, unused capacity, commitment fee percentage 0.30%                
Senior Secured Notes | 5.25% Senior Notes Due 2022                  
Debt Instrument [Line Items]                  
Stated interest rate 5.25% 5.25%     5.25%   5.25%    
Debt face amount $ 0 $ 400,000,000     $ 0   $ 0    
Debt repurchase amount   411,433,000              
Loss on extinguishment of debt   $ 14,322,000              
Senior Notes | 4.25% Senior Notes Due 2020                  
Debt Instrument [Line Items]                  
Stated interest rate 4.25%     4.25% 4.25%   4.25%    
Debt face amount $ 0     $ 500,000,000 $ 0   $ 0    
Debt repurchase amount       509,565,000          
Loss on extinguishment of debt       $ 8,393,000          
Senior Notes | 5.75% Senior Notes Due 2021                  
Debt Instrument [Line Items]                  
Stated interest rate 5.75%   5.75%   5.75%   5.75%    
Debt face amount $ 0   $ 600,000,000   $ 0   $ 0    
Debt repurchase amount     617,538,000            
Loss on extinguishment of debt     $ 20,964,000            
Senior Notes | 3.875% Senior Notes Due 2022                  
Debt Instrument [Line Items]                  
Stated interest rate 3.875%       3.875%   3.875%   3.875%
Debt face amount $ 1,000,000,000       $ 1,000,000,000   $ 1,000,000,000   $ 1,000,000,000
Debt unamortized discount                 $ 10,291,000
Senior Notes | 5.00% Senior Notes Due 2027                  
Debt Instrument [Line Items]                  
Stated interest rate 5.00%       5.00%   5.00%   5.00%
Debt face amount $ 1,500,000,000       $ 1,500,000,000   $ 1,500,000,000   $ 1,500,000,000
Debt unamortized discount                 $ 16,638,000