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Summary of Significant Accounting Policies - Schedule of Property, Plant and Equipment (Details) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Utility Plant and Depreciation [Line Items] |  |
Net | $ 16,833,524 | $ 15,803,127
Construction work in progress | 1,592,659 | 1,724,004
Intangible assets, net of accumulated amortization | 591,310 | 267,110
Nuclear fuel, net of accumulated amortization | 97,850 | 99,490
Total property, plant and equipment | 19,197,899 | 17,980,157
Electric Service |  |
Utility Plant and Depreciation [Line Items] |  |
Generation | 11,111,915 | 10,446,291
Transmission | 4,135,970 | 3,773,253
Distribution | 9,016,843 | 8,448,293
General plant | 1,596,222 | 1,543,330
Plant in service and held for future use | 25,860,950 | 24,211,167
Accumulated depreciation and amortization | (9,027,426) | (8,408,040)
Net | 16,833,524 | 15,803,127
Construction work in progress | 1,592,659 | 1,724,004
Intangible assets, net of accumulated amortization | 591,310 | 267,110
Nuclear fuel, net of accumulated amortization | 97,850 | 99,490
Total property, plant and equipment | 19,197,899 | 17,980,157
Electric Service | Variable Interest Entity |  |
Utility Plant and Depreciation [Line Items] |  |
Total property, plant and equipment | $ 82,556 | $ 86,426

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