Long-lived Assets (Property and Equipment, Net) (Details) - USD ($) $ in Millions |
Jun. 30, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Property, Plant, and Equipment [Line Items] | ||
| Total property and equipment, gross | $ 11,631.6 | $ 11,200.5 |
| Accumulated depreciation | (6,209.5) | (5,930.2) |
| Total property and equipment, net | 5,422.1 | 5,270.3 |
| Distribution systems | ||
| Property, Plant, and Equipment [Line Items] | ||
| Total property and equipment, gross | 7,528.4 | 7,189.1 |
| Support equipment, buildings and land | ||
| Property, Plant, and Equipment [Line Items] | ||
| Total property and equipment, gross | 2,940.5 | 2,941.2 |
| CPE | ||
| Property, Plant, and Equipment [Line Items] | ||
| Total property and equipment, gross | $ 1,162.7 | $ 1,070.2 |
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- Definition Amount of accumulated depreciation and amortization from plant, property, and equipment and right-of-use asset from finance lease. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount, after accumulated depreciation and amortization, of property, plant, and equipment and finance lease right-of-use asset. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount, before accumulated depreciation and amortization, of property, plant, and equipment and finance lease right-of-use asset. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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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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