Stock-Based Compensation (Details) - USD ($) shares in Millions, $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
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| Stock-Based Compensation | ||||
| Shares of GCI | 5.0 | 5.0 | ||
| Stock-based compensation expense | $ 6 | $ 2 | $ 21 | $ 9 |
| X | ||||||||||
- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Number of shares authorized for issuance under share-based payment arrangement. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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