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Intangible Assets - Amortization Expense (Details)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2025
USD ($)
Years
Sep. 30, 2024
USD ($)
Sep. 30, 2025
USD ($)
Years
Sep. 30, 2024
USD ($)
Finite-Lived Intangible Assets [Line Items]        
Intangible asset amortization expense $ 22 $ 22 $ 67 $ 67
The number of succeeding years for which amortization expense is disclosed | Years 4   4  
Amortization expense for the remainder of the Year $ 22   $ 22  
Amortization expense for Year One 89   89  
Amortization expense for Year Two 74   74  
Amortization expense for Year Three 68   68  
Amortization expense for Year Four 68   68  
Amortization expense Thereafter 509   509  
Amortizable—Franchise agreements (a)        
Finite-Lived Intangible Assets [Line Items]        
Intangible asset amortization expense 16 17 50 50
Amortizable—License agreements (c)        
Finite-Lived Intangible Assets [Line Items]        
Intangible asset amortization expense 1 1 1 1
Amortizable—Customer relationships (d)        
Finite-Lived Intangible Assets [Line Items]        
Intangible asset amortization expense 5 4 16 15
Amortizable—Other (f)        
Finite-Lived Intangible Assets [Line Items]        
Intangible asset amortization expense $ 0 $ 0 $ 0 $ 1