Condensed Statements of Consolidated Income (Unaudited) - USD ($) shares in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Revenues:
Utility revenues	$ 1,789	$ 1,862	$ 4,506	$ 4,571
Non-utility revenues	86	82	148	136
Total	1,875	1,944	4,654	4,707
Expenses:
Utility natural gas, fuel and purchased power	280	413	1,358	1,511
Non-utility cost of revenues, including natural gas	57	56	97	91
Operation and maintenance	679	662	1,342	1,350
Depreciation and amortization	349	327	668	645
Taxes other than income taxes	130	135	268	282
Total	1,495	1,593	3,733	3,879
Operating Income	380	351	921	828
Other Income (Expense):
Gain (loss) on equity securities	(31)	(61)	7	(78)
Gain (loss) on indexed debt securities	34	65	(5)	171
Gain (loss) on sale	(12)	0	(12)	303
Interest expense and other finance charges	(165)	(106)	(313)	(259)
Interest expense on Securitization Bonds	(2)	(4)	(4)	(8)
Other income (expense), net	13	(1)	26	17
Total	(163)	(107)	(301)	146
Income Before Income Taxes	217	244	620	974
Income tax expense	99	54	177	253
Net Income	118	190	443	721
Income allocated to preferred shareholders	12	11	24	24
Income Available to Common Shareholders	$ 106	$ 179	$ 419	$ 697
Basic Earnings (Loss) Per Common Share [Abstract]
Basic Earnings Per Common Share (in dollars per share)	$ 0.17	$ 0.28	$ 0.66	$ 1.11
Diluted Earnings (Loss) Per Common Share [Abstract]
Diluted Earnings Per Common Share (in dollars per share)	$ 0.17	$ 0.28	$ 0.66	$ 1.10
Weighted Average Common Shares Outstanding, Basic (in shares)	631,057	629,475	630,685	629,306
Weighted Average Common Shares Outstanding, Diluted (in shares)	633,005	631,663	633,030	631,494