CONDENSED CONSOLIDATED INCOME STATEMENTS - 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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| Income Statement [Abstract] | ||||
| Operating revenues | $ 2,290.6 | $ 2,104.0 | $ 7,786.9 | $ 7,263.0 |
| Operating expenses | ||||
| Cost of sales | 651.2 | 608.1 | 2,597.8 | 2,344.3 |
| Other operation and maintenance | 614.4 | 605.1 | 1,840.2 | 1,809.3 |
| Depreciation and amortization | 389.0 | 373.4 | 1,153.7 | 1,102.2 |
| Property and revenue taxes | 72.3 | 67.8 | 218.7 | 215.2 |
| Total operating expenses | 1,726.9 | 1,654.4 | 5,810.4 | 5,471.0 |
| Operating income | 563.7 | 449.6 | 1,976.5 | 1,792.0 |
| Equity in earnings of transmission affiliates | 65.8 | 54.8 | 187.9 | 160.3 |
| Other income, net | 49.5 | 23.8 | 159.2 | 68.4 |
| Interest expense | 241.7 | 223.6 | 699.1 | 667.4 |
| Other expense | (126.4) | (145.0) | (352.0) | (438.7) |
| Income before income taxes | 437.3 | 304.6 | 1,624.5 | 1,353.3 |
| Income tax expense | 47.0 | 34.4 | 127.1 | 114.6 |
| Net income | 390.3 | 270.2 | 1,497.4 | 1,238.7 |
| Preferred stock dividends of subsidiary | 0.3 | 0.3 | 0.9 | 0.9 |
| Net (income) loss attributed to noncontrolling interests | (0.7) | 1.4 | (3.6) | 3.1 |
| Net income attributed to common shareholders | $ 389.3 | $ 271.3 | $ 1,492.9 | $ 1,240.9 |
| EPS | ||||
| Basic (in dollars per share) | $ 1.19 | $ 0.84 | $ 4.58 | $ 3.87 |
| Diluted (in dollars per share) | $ 1.18 | $ 0.83 | $ 4.54 | $ 3.85 |
| Weighted average common shares outstanding | ||||
| Basic (in shares) | 326.6 | 323.5 | 326.0 | 320.7 |
| Diluted (in shares) | 328.8 | 325.6 | 328.7 | 322.4 |
| X | ||||||||||
- Definition The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Total costs of sales and operating expenses for the period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- References No definition available.
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- Definition Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition The amount of net income (loss) from continuing operations per each share of common stock or unit outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The amount of net income (loss) derived from continuing operations during the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References No definition available.
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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of interest expense classified as other. No definition available.
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- Definition Amount of Net Income (Loss) attributable to noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities; of income (loss) available to common shareholders. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The aggregate amount of income or expense from ancillary business-related activities (that is to say, excluding major activities considered part of the normal operations of the business). Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- References No definition available.
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- Definition The net result for the period of deducting operating expenses from operating revenues. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition The total amount of other operating cost and expense items that are associated with the entity's normal revenue producing operation. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of income (expense) related to nonoperating activities, classified as other. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition The amount of preferred stock dividends that is an adjustment to net income apportioned to common stockholders. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition All taxes not related to income of the entity or excise or sales taxes levied on the revenue of the entity that are not reported elsewhere. These taxes could include production, real estate, personal property, and pump tax. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of income (loss) for proportionate share of equity method income (loss) from investments in transmission affiliates. No definition available.
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- Definition Weighted Average Common Shares Outstanding (Millions). No definition available.
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