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Debt - Additional Information (Detail) - USD ($)
1 Months Ended 3 Months Ended 9 Months Ended
Sep. 15, 2016
May 31, 2016
Sep. 24, 2016
Sep. 24, 2016
Debt Instrument [Line Items]        
Loss on extinguishment of debt     $ (15,000,000) $ (15,000,000)
9.75% senior secured notes, due 2019        
Debt Instrument [Line Items]        
Long-term debt, interest rate 9.75%      
Long-term debt, due date 2019      
Long-term debt, redemption price percent 4.875%      
Long-term debt, amount notes outstanding $ 250,000,000      
Long-term debt, amount notes redeemed 262,000,000      
Loss on extinguishment of debt (15,000,000)      
Long-term debt, redemption premium amount $ 12,000,000      
Amended Credit Agreement        
Debt Instrument [Line Items]        
Available credit under the Facility     1,100,000,000 1,100,000,000
Expiration period under the new Facility   5 years    
Maximum borrowing capacity under the new Facility   $ 1,200,000,000    
Maturity date of the new Facility   May 13, 2021    
Amount outstanding under letters of credit     90,000,000 90,000,000
Average borrowings under the Facility     0  
Amended Credit Agreement | Other Assets        
Debt Instrument [Line Items]        
Debt acquisition costs     $ 6,000,000 $ 6,000,000