Property, Plant, and Equipment (Tables)

9 Months Ended

Sep. 30, 2024

Property, Plant and Equipment [Abstract]

Summary of Depreciation, Amortization, and Accretion Expense

		Successor
		September 30, 2024						December 31, 2023
	Estimated Useful Life (years)	Gross Value		Accumulated Provision		Carrying Value		Gross Value		Accumulated Provision		Carrying Value
Electric generation	3-27	$	3,020	$	(246)	$	2,774	$	3,178	$	(109)	$	3,069
Nuclear fuel	1-6	322		(129)		193		228		(55)		173
Other property and equipment	1-26	148		(36)		112		358		(21)		337
Capitalized software	1-5	9		(3)		6		6		(1)		5
Construction work in progress		143		—		143		255		—		255
Property, plant and equipment, net		$	3,642	$	(414)	$	3,228	$	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
	Three Months Ended September 30, 2024		Three Months Ended September 30, 2023		Nine Months Ended September 30, 2024		May 18 through September 30, 2023		January 1 through May 17, 2023
Depreciation expense (a)	$	56	$	53	$	172	$	76	$	173
Amortization expense (b)	5		—		11		1		4
Accretion expense (c)	14		13		42		17		24
Other	—		—		—		—		(1)
Depreciation, amortization, and accretion	$	75	$	66	$	225	$	94	$	200

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(a)Electric generation and other property and equipment.

(b)Intangible assets and capitalized software.

(c)ARO and accrued environmental cost accretion. See Note 9 for additional information.