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Intangible Assets Amortization Expense (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Schedule of Finite-Lived Intangible Assets, Amortization Expense [Line Items]      
Amortization of Intangible Assets $ 76 $ 76 $ 81
Expected amortization expense for 2020 73    
Expected amortization expense for 2021 71    
Expected amortization expense for 2022 70    
Expected amortization expense for 2023 70    
Expected amortization expense for 2024 70    
Expected amortization expense thereafter 859    
Amortizable—Franchise agreements (a)      
Schedule of Finite-Lived Intangible Assets, Amortization Expense [Line Items]      
Amortization of Intangible Assets 67 67 67
Amortizable—License agreements (c)      
Schedule of Finite-Lived Intangible Assets, Amortization Expense [Line Items]      
Amortization of Intangible Assets 1 1 1
Amortizable—Customer relationships (d)      
Schedule of Finite-Lived Intangible Assets, Amortization Expense [Line Items]      
Amortization of Intangible Assets 2 3 4
Amortizable—Other (f)       
Schedule of Finite-Lived Intangible Assets, Amortization Expense [Line Items]      
Amortization of Intangible Assets $ 6 $ 5 $ 9