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Seasonal Financing - Additional Information (Detail) - USD ($)
6 Months Ended
Jun. 30, 2017
Jun. 14, 2017
2017 Credit Facility    
Debt Instrument [Line Items]    
Debt-to-earnings before interest taxes depreciation amortization ratio maximum for covenant compliance 375.00%  
Aggregate commitment under the credit facility $ 1,600,000,000.00  
Aggregate commitment under the credit facility, including the accordion feature $ 1,850,000,000.00  
2017 Credit Facility | Minimum    
Debt Instrument [Line Items]    
Commitment fee rate for unused commitments 0.08%  
2017 Credit Facility | Maximum    
Debt Instrument [Line Items]    
Commitment fee rate for unused commitments 0.25%  
2017 Credit Facility | Base Rate | Minimum    
Debt Instrument [Line Items]    
Interest rate margin for loans 0.00%  
2017 Credit Facility | Base Rate | Maximum    
Debt Instrument [Line Items]    
Interest rate margin for loans 0.75%  
2017 Credit Facility | LIBOR | Minimum    
Debt Instrument [Line Items]    
Interest rate margin for loans 0.88%  
2017 Credit Facility | LIBOR | Maximum    
Debt Instrument [Line Items]    
Interest rate margin for loans 1.75%  
2015 Credit Facility    
Debt Instrument [Line Items]    
Debt-to-earnings before interest taxes depreciation amortization ratio maximum for covenant compliance   350.00%