Property, Plant and Equipment - Schedule of Property, Plant and Equipment (Details) - USD ($) $ in Millions	Sep. 30, 2026	Dec. 31, 2025
Finite-Lived Assets
Gross Value	$ 12,877	$ 8,256
Accumulated Depreciation	(1,019)	(710)
Carrying Value	11,858	7,546
Electric generation
Finite-Lived Assets
Gross Value	11,767	7,522
Accumulated Depreciation	(775)	(481)
Carrying Value	10,992	7,041
Nuclear fuel
Finite-Lived Assets
Gross Value	458	403
Accumulated Depreciation	(223)	(213)
Carrying Value	235	190
Other property and equipment
Finite-Lived Assets
Gross Value	333	63
Accumulated Depreciation	(15)	(11)
Carrying Value	318	52
Capitalized software
Finite-Lived Assets
Gross Value	11	10
Accumulated Depreciation	(6)	(5)
Carrying Value	5	5
Construction work in progress
Finite-Lived Assets
Gross Value	308	258
Carrying Value	$ 308	$ 258
Minimum \| Electric generation
Finite-Lived Assets
Estimated Useful Life (years)	3 years
Minimum \| Nuclear fuel
Finite-Lived Assets
Estimated Useful Life (years)	1 year
Minimum \| Other property and equipment
Finite-Lived Assets
Estimated Useful Life (years)	3 years
Minimum \| Capitalized software
Finite-Lived Assets
Estimated Useful Life (years)	1 year
Maximum \| Electric generation
Finite-Lived Assets
Estimated Useful Life (years)	37 years
Maximum \| Nuclear fuel
Finite-Lived Assets
Estimated Useful Life (years)	6 years
Maximum \| Other property and equipment
Finite-Lived Assets
Estimated Useful Life (years)	24 years
Maximum \| Capitalized software
Finite-Lived Assets
Estimated Useful Life (years)	5 years

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.

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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.

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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.

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