Consolidated Statements of Operations - NPC - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Revenues	$ 25,920	$ 25,602	$ 26,337
Operating expenses:
Cost of fuel and energy	6,616	7,057	6,757
Total operating expenses	21,574	22,822	21,096
Operating income	4,346	2,780	5,241
Other income (expense):
Interest expense	(2,716)	(2,415)	(2,216)
Capitalized interest	188	132	76
Allowance for equity funds	352	267	167
Interest and dividend income	443	412	154
Other, net	86	116	(7)
Total other income (expense)	(1,173)	(819)	(3,828)
Income before income tax expense (benefit) and equity income (loss)	3,173	1,961	1,413
Income tax expense (benefit)	(1,582)	(1,699)	(1,916)
Net income attributable to parent	4,300	3,020	2,721
NPC
Revenues	2,873	3,088	2,630
Operating expenses:
Cost of fuel and energy	1,608	1,942	1,427
Operations and maintenance	311	312	303
Depreciation and amortization	376	432	417
Property and other taxes	58	56	53
Total operating expenses	2,353	2,742	2,200
Operating income	520	346	430
Other income (expense):
Interest expense	(207)	(196)	(165)
Capitalized interest	20	25	8
Allowance for equity funds	31	21	11
Interest and dividend income	24	72	47
Other, net	18	14	3
Total other income (expense)	(114)	(64)	(96)
Income before income tax expense (benefit) and equity income (loss)	406	282	334
Income tax expense (benefit)	57	22	36
Net income attributable to parent	$ 349	$ 260	$ 298