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Debt - Additional Information (Detail) - USD ($)
$ in Millions
1 Months Ended
Oct. 31, 2015
Jul. 31, 2015
Senior Secured Credit Facility Term Loans    
Debt Instrument [Line Items]    
Amount borrowed   $ 900
Senior Secured Credit Facility Term Loans | Subsequent Event    
Debt Instrument [Line Items]    
Amount borrowed $ 200  
Senior Secured Term Loan B1 Facility    
Debt Instrument [Line Items]    
Amount borrowed   $ 300
Debt instrument maturity year   2020
Senior Secured Term Loan B1 Facility | London Interbank Offered Rate (LIBOR)    
Debt Instrument [Line Items]    
Debt Instrument, Basis Spread on Variable Rate   2.75%
New Senior Secured Term Loan B2 Facility    
Debt Instrument [Line Items]    
Amount borrowed   $ 600
Debt instrument maturity year   2022
New Senior Secured Term Loan B2 Facility | London Interbank Offered Rate (LIBOR)    
Debt Instrument [Line Items]    
Debt Instrument, Basis Spread on Variable Rate   2.75%
Senior secured term loan A facility | Subsequent Event    
Debt Instrument [Line Items]    
Debt instrument maturity year 2019  
Senior secured term loan A facility | London Interbank Offered Rate (LIBOR) | Subsequent Event    
Debt Instrument [Line Items]    
Debt Instrument, Basis Spread on Variable Rate 1.75%  
5% Senior Notes Due in November 2023 | Subsequent Event    
Debt Instrument [Line Items]    
Private offering senior notes, aggregate principal amount $ 300  
Interest rate of debt instrument 5.00%  
Senior notes, maturity period 2023-11  
Net proceeds from issuance of senior notes after deducting fees and expenses $ 296