Consolidated Statements of Operations - NPC - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Revenues	$ 26,337	$ 25,150	$ 20,952
Operating expenses:
Cost of fuel and energy	6,757	5,504	4,187
Total operating expenses	21,096	19,823	16,661
Operating income	5,241	5,327	4,291
Other income (expense):
Interest expense	(2,216)	(2,118)	(2,021)
Capitalized interest	76	64	80
Allowance for equity funds	167	126	165
Interest and dividend income	154	89	71
Other, net	(7)	(17)	88
Total other income (expense)	(3,828)	(33)	3,180
Income (loss) before income tax expense (benefit) and equity income (loss)	1,413	5,294	7,471
Income tax (benefit) expense	(1,916)	(1,132)	308
Net income (loss) attributable to parent	2,721	5,790	6,943
NPC
Revenues	2,630	2,139	1,998
Operating expenses:
Cost of fuel and energy	1,427	939	816
Operations and maintenance	303	301	299
Depreciation and amortization	417	406	361
Property and other taxes	53	48	47
Total operating expenses	2,200	1,694	1,523
Operating income	430	445	475
Other income (expense):
Interest expense	(165)	(153)	(162)
Capitalized interest	8	3	3
Allowance for equity funds	11	7	7
Interest and dividend income	47	20	10
Other, net	3	18	9
Total other income (expense)	(96)	(105)	(133)
Income (loss) before income tax expense (benefit) and equity income (loss)	334	340	342
Income tax (benefit) expense	36	37	47
Net income (loss) attributable to parent	$ 298	$ 303	$ 295