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Intangible Assets - Amortization Expense (Details)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2022
USD ($)
Years
Jun. 30, 2021
USD ($)
Jun. 30, 2022
USD ($)
Years
Jun. 30, 2021
USD ($)
Finite-Lived Intangible Assets [Line Items]        
Intangible asset amortization expense $ 25 $ 23 $ 49 $ 46
The number of succeeding years for which amortization expense is disclosed | Years 4   4  
Amortization expense for the remainder of the Year $ 47   $ 47  
Amortization expense for Year One 89   89  
Amortization expense for Year Two 89   89  
Amortization expense for Year Three 89   89  
Amortization expense for Year Four 89   89  
Amortization expense Thereafter 720   720  
Amortizable—Franchise agreements (a)        
Finite-Lived Intangible Assets [Line Items]        
Intangible asset amortization expense 16 17 33 34
Amortizable—Customer relationships (d)        
Finite-Lived Intangible Assets [Line Items]        
Intangible asset amortization expense 5 5 10 11
Amortizable—Other (f)        
Finite-Lived Intangible Assets [Line Items]        
Intangible asset amortization expense $ 4 $ 1 $ 6 $ 1