Revenue Recognition (Narrative) (Details) - USD ($) $ in Millions |
9 Months Ended | |
|---|---|---|
Sep. 30, 2026 |
Dec. 31, 2025 |
|
| Revenue from Contract with Customer [Abstract] | ||
| Franchise agreement, revenue recognition period (within) | 13 years | |
| Capitalized Contract Cost [Line Items] | ||
| Capitalized contract cost, net | $ 87 | $ 84 |
| Balance Sheet Location [Axis]: us-gaap:OtherAssetsCurrent | ||
| Capitalized Contract Cost [Line Items] | ||
| Capitalized contract cost, net | 5 | 5 |
| Balance Sheet Location [Axis]: us-gaap:OtherAssetsNoncurrent | ||
| Capitalized Contract Cost [Line Items] | ||
| Capitalized contract cost, net | $ 82 | $ 79 |