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Intangible Assets - Amortization Expense (Details)
$ in Millions
 3 Months Ended
Mar. 31, 2016
USD ($)
Years
Mar. 31, 2015
USD ($)
Finite-Lived Intangible Assets [Line Items]    
Intangible asset amortization expense $ 26 $ 26
The number of succeeding years for which amortization expense is disclosed | Years 4  
Amortization expense for the remainder of 2016 $ 77  
Amortization expense for the next twelve months 95  
Amortization expense for Year Two 94  
Amortization expense for Year Three 93  
Amortization expense for Year Four 91  
Amortization expense Thereafter 1,257  
Amortizable—Franchise agreements (a)    
Finite-Lived Intangible Assets [Line Items]    
Intangible asset amortization expense 17 17
Amortizable—License agreements (c)    
Finite-Lived Intangible Assets [Line Items]    
Intangible asset amortization expense 0 1
Amortizable—Customer relationships (d)    
Finite-Lived Intangible Assets [Line Items]    
Intangible asset amortization expense 7 7
Amortizable—Other (g)    
Finite-Lived Intangible Assets [Line Items]    
Intangible asset amortization expense $ 2 $ 1