Goodwill and Intangible Assets - Goodwill Rollforward (Details) - USD ($) $ in Millions |
6 Months Ended | |
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Jun. 30, 2025 |
Dec. 31, 2024 |
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| Goodwill [Line Items] | ||
| Goodwill, accumulated impairment losses | $ 2,405 | $ 2,405 |
| Goodwill [Roll Forward] | ||
| As of December 31, 2024 | 6,955 | |
| Reclassified as held for sale | (1,305) | |
| As of June 30, 2025 | 5,650 | |
| Lumen Mass Markets fiber-to-the-home business | Held-for-sale | ||
| Goodwill [Line Items] | ||
| Goodwill | $ 1,305 |
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- Definition Amount classified as goodwill attributable to disposal group held for sale or disposed of. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of accumulated impairment loss for asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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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/exampleRef
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
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- Definition Amount of increase (decrease) from transfer into (out of) asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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