Revenue Recognition - Contract Liabilities (Details) - USD ($) $ in Millions |
Sep. 30, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Contract liabilities | ||
| Contract liabilities | $ 250 | $ 252 |
| Deferred Revenue Related To Prepaid Stored Value Products [Member] | ||
| Contract liabilities | ||
| Contract liabilities | 139 | 133 |
| Deferred Revenue Related To Upfront Franchise Fees [Member] | ||
| Contract liabilities | ||
| Contract liabilities | 55 | 57 |
| Deferred Revenue Related To Customer Loyalty Programs [Member] | ||
| Contract liabilities | ||
| Contract liabilities | 19 | 18 |
| Deferred Revenue Related To Privilege Membership Programs [Member] | ||
| Contract liabilities | ||
| Contract liabilities | $ 37 | $ 44 |