Revenue Recognition (Narrative) (Details) - USD ($) $ in Millions  | 
6 Months Ended | |
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Jun. 30, 2025  | 
Dec. 31, 2024  | 
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| Revenue from Contract with Customer [Abstract] | ||
| Franchise agreement, revenue recognition period (within) | 13 years | |
| Capitalized Contract Cost [Line Items] | ||
| Capitalized contract cost, net | $ 79 | $ 76 | 
| Other current assets | ||
| Capitalized Contract Cost [Line Items] | ||
| Capitalized contract cost, net | 5 | 5 | 
| Other non-current assets | ||
| Capitalized Contract Cost [Line Items] | ||
| Capitalized contract cost, net | $ 74 | $ 71 | 
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- Definition Amount, after accumulated amortization and accumulated impairment loss, of asset recognized from cost incurred to obtain or fulfill contract with customer. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- References No definition available. 
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- Definition Revenue Recognition Period, Franchise Agreement No definition available. 
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- Details 
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- Details 
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