Long-lived Assets - Schedule of Property and Equipment and the Related Accumulated Depreciation (Details) - USD ($) $ in Millions |
Sep. 30, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Property, Plant, and Equipment [Line Items] | ||
| Property, plant and equipment, gross, excluding construction in progress | $ 6,976.2 | $ 7,648.9 |
| Accumulated depreciation | (3,609.3) | (4,105.2) |
| Total depreciable assets | 3,366.9 | 3,543.7 |
| Total property and equipment, net | 3,731.0 | 3,847.8 |
| Distribution systems | ||
| Property, Plant, and Equipment [Line Items] | ||
| Property and equipment, gross | 4,976.3 | 5,280.3 |
| Support equipment and buildings | ||
| Property, Plant, and Equipment [Line Items] | ||
| Property and equipment, gross | 1,197.6 | 1,403.2 |
| CPE | ||
| Property, Plant, and Equipment [Line Items] | ||
| Property and equipment, gross | 802.3 | 965.4 |
| CIP and land | ||
| Property, Plant, and Equipment [Line Items] | ||
| Property and equipment, gross | $ 364.1 | $ 304.1 |
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- Definition Property, Plant and Equipment, Gross, Excluding Construction In Progress No definition available.
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- Definition Property, Plant and Equipment, Net, Excluding Construction In Progress No definition available.
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- Definition Amount of accumulated depreciation, depletion, and amortization of property, plant, and equipment. Includes, but is not limited to, land and land improvement; building; machinery and equipment; furniture and fixture; and work of art, historical treasure, or similar asset classified as collection. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount, before accumulated depreciation, depletion, and amortization, of property, plant, and equipment. Includes, but is not limited to, land and land improvement; building; machinery and equipment; furniture and fixture; and work of art, historical treasure, or similar asset classified as collection. 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/2009/role/commonPracticeRef
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- Definition Amount, after accumulated depreciation, depletion, and amortization, of property, plant, and equipment. Includes, but is not limited to, land and land improvement; building; machinery and equipment; furniture and fixture; and work of art, historical treasure, or similar asset classified as collection. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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