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Revenue Recognition Accounting Policy (Details 2) - USD ($)
$ in Millions
 9 Months Ended
Sep. 30, 2025
Dec. 31, 2024
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]    
Deferred Revenue $ 431 $ 438
Revenue recognized that was included in unamortized upfront fees received from franchisees at the beginning of the period (62)  
Increase for upfront fees associated with contracts that became effective during the period, net of amounts recognized as revenue during the period 49  
Foreign Currency Gain (Loss) and Refranchising Gain (Loss) [Member]    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]    
Other [1] $ 6  
[1] Primarily includes the impact of foreign currency translation.