Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Income Statement [Abstract]
Operating Revenue	[1]	$ 1,083	$ 863	$ 2,841	$ 2,299
Operating Expenses:
Fuel used in electric generation		342	200	770	452
Purchased power	[1]	28	24	86	67
Gas purchased for resale		102	57	296	188
Other operations and maintenance		117	116	343	332
Other operations and maintenance - affiliated suppliers		40	45	122	145
Impairment of assets and other charges		2	1	6	320
Depreciation and amortization		127	122	378	362
Other taxes	[1]	72	64	216	191
Total operating expenses		830	629	2,217	2,057
Operating income		253	234	624	242
Other income, net		22	6	46	0
Interest charges, net of allowance for borrowed funds used during construction	[1]	57	50	162	159
Income before income tax expense		218	190	508	83
Income tax expense		45	42	102	6
Net Income and Other Comprehensive Income		173	148	406	77
Comprehensive Income Attributable to Noncontrolling Interest		5	4	16	13
Comprehensive Income Available to Common Shareholder		$ 168	$ 144	$ 390	$ 64

[1] See Note 12 for amounts attributable to affiliates.