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Subsequent Event (Details) - Commercial Paper - ABCP borrowings - USD ($)
12 Months Ended
Feb. 25, 2016
Dec. 31, 2015
Dec. 19, 2014
Subsequent Event [Line Items]      
Amended ABCP credit facility     $ 750,000,000
Unused borrowing capacity fee (as a percent)   0.40%  
London Interbank Offered Rate (LIBOR)      
Subsequent Event [Line Items]      
Basis spread on variable rate   0.80%  
Subsequent Event      
Subsequent Event [Line Items]      
Amended ABCP credit facility $ 750,000,000.0    
Funds available to draw $ 750,000,000.0    
Subsequent Event | London Interbank Offered Rate (LIBOR)      
Subsequent Event [Line Items]      
Basis spread on variable rate 1.00%    
Minimum | Subsequent Event      
Subsequent Event [Line Items]      
Unused borrowing capacity fee (as a percent) 0.35%    
Maximum | Subsequent Event      
Subsequent Event [Line Items]      
Unused borrowing capacity fee (as a percent) 0.45%