Property, Plant, and Equipment - Proportionate Shares of Property, Plant and Equipment, Net (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023	May 17, 2023
Property, Plant and Equipment [Line Items]
Gross Value	$ 3,619	$ 4,025
Accumulated Depreciation	(465)	(186)
Carrying Value	$ 3,154	$ 3,839	$ 3,864
Susquehanna
Property, Plant and Equipment [Line Items]
Ownership interest	90.00%	90.00%
Gross Value	$ 2,664	$ 2,531
Accumulated Depreciation	(326)	(121)
Carrying Value	2,338	2,410
Electric generation
Property, Plant and Equipment [Line Items]
Gross Value	3,030	3,178
Accumulated Depreciation	(292)	(109)
Carrying Value	2,738	3,069
Electric generation | Susquehanna
Property, Plant and Equipment [Line Items]
Gross Value	2,206	2,187
Nuclear fuel
Property, Plant and Equipment [Line Items]
Gross Value	322	228
Accumulated Depreciation	(152)	(55)
Carrying Value	170	173
Nuclear fuel | Susquehanna
Property, Plant and Equipment [Line Items]
Gross Value	322	228
Other property and equipment
Property, Plant and Equipment [Line Items]
Gross Value	90	358
Accumulated Depreciation	(18)	(21)
Carrying Value	72	337
Other property and equipment | Susquehanna
Property, Plant and Equipment [Line Items]
Gross Value	25	19
Capitalized software
Property, Plant and Equipment [Line Items]
Gross Value	8	6
Accumulated Depreciation	(3)	(1)
Carrying Value	5	5
Capitalized software | Susquehanna
Property, Plant and Equipment [Line Items]
Gross Value	2	2
Construction work in progress
Property, Plant and Equipment [Line Items]
Gross Value	169	255
Carrying Value	169	255
Construction work in progress | Susquehanna
Property, Plant and Equipment [Line Items]
Gross Value	$ 109	$ 95