Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Income Statement [Abstract]
Operating Revenue	[1]	$ 731	$ 704	$ 1,506	$ 1,463
Operating Expenses:
Fuel used in electric generation		135	135	280	285
Purchased power	[1]	22	29	32	36
Gas purchased for resale		46	45	125	127
Other operations and maintenance		126	100	248	215
Other operations and maintenance - affiliated suppliers		42	42	83	83
Impairment of assets and other charges		4		4
Depreciation and amortization		136	131	272	260
Other taxes	[1]	76	74	154	152
Total operating expenses		587	556	1,198	1,158
Operating income		144	148	308	305
Other income (expense), net		1	18	2	28
Interest charges, net of AFUDC	[1]	67	63	134	122
Income before income tax expense		78	103	176	211
Income tax expense		15	22	33	33
Net Income and Other Comprehensive Income		63	81	143	178
Comprehensive Income Attributable to Noncontrolling Interest		6	5	12	10
Comprehensive Income Available to Common Shareholder		$ 57	$ 76	$ 131	$ 168

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