Property, Plant, and Equipment (Tables)

12 Months Ended

Dec. 31, 2024

Property, Plant and Equipment [Abstract]

Summary of Depreciation, Amortization, and Accretion Expense

		Successor
		December 31, 2024						December 31, 2023
	Estimated Useful Life (years)	Gross Value		Accumulated Depreciation		Carrying Value		Gross Value		Accumulated Depreciation		Carrying Value
Electric generation	3-27	$	3,030	$	(292)	$	2,738	$	3,178	$	(109)	$	3,069
Nuclear fuel	1-6	322		(152)		170		228		(55)		173
Other property and equipment	1-26	90		(18)		72		358		(21)		337
Capitalized software	1-5	8		(3)		5		6		(1)		5
Construction work in progress		169		—		169		255		—		255
Property, plant and equipment, net		$	3,619	$	(465)	$	3,154	$	4,025	$	(186)	$	3,839

The components of “Depreciation, amortization and accretion” presented on the Consolidated Statements of Operations for the periods were: 

	Successor				Predecessor
	Year Ended December 31, 2024		May 18 through December 31, 2023		January 1 through May 17, 2023		Year Ended December 31, 2022
Depreciation expense (a)	$	225	$	133	$	173	$	432
Amortization expense (b)	16		1		4		12
Accretion expense (c)	57		31		24		78
Other	—		—		(1)		(2)
Depreciation, amortization and accretion	$	298	$	165	$	200	$	520

__________________

(a)Electric generation and other property and equipment.

(b)Intangible assets and capitalized software.

(c)ARO and accrued environmental cost accretion. See Note 11 for additional information.

The proportionate share of “Property, plant and equipment, net” related to Susquehanna presented on the Consolidated Balance Sheets was:

	Successor
	December 31, 2024		December 31, 2023
Ownership interest	90%		90%
Electric generation	$	2,206	$	2,187
Nuclear fuel	322		228
Other property and equipment	25		19
Capitalized software	2		2
Construction work in progress	109		95
Proportionate property, plant and equipment, cost	2,664		2,531
Less: accumulated depreciation and amortization	326		121
Proportionate property, plant and equipment, net	$	2,338	$	2,410

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense

Estimated intangible assets amortization expense for the next four years is:

	2025		2026		2027		2028 (a)
Estimated amortization expense	$	14	$	5	$	3	$	1

__________________

(a)Supply contracts underlying the nuclear fuel intangible assets expire in 2028.