Condensed Statements of Consolidated Income - USD ($) shares in Thousands, $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Revenues:
Utility revenues	$ 2,709	$ 2,484
Non-utility revenues	54	63
Total	2,763	2,547
Expenses:
Utility natural gas, fuel and purchased power	1,098	935
Non-utility cost of revenues, including natural gas	35	40
Operation and maintenance	688	669
Depreciation and amortization	318	307
Taxes other than income taxes	147	143
Total	2,286	2,094
Operating Income	477	453
Other Income (Expense):
Loss on equity securities	(17)	(23)
Gain on indexed debt securities	106	26
Gain on sale	303	0
Interest expense and other finance charges	(153)	(140)
Interest expense on Securitization Bonds	(4)	(6)
Other income, net	18	19
Total	253	(124)
Income from Continuing Operations Before Income Taxes	730	329
Income tax expense	199	49
Income from Continuing Operations	531	280
Income from Discontinued Operations (net of tax expense of $—, $25, respectively)	0	83
Net Income	531	363
Income allocated to preferred shareholders	13	29
Income Available to Common Shareholders	$ 518	$ 334
Basic Earnings (Loss) Per Common Share [Abstract]
Basic earnings per common share - continuing operations (in dollars per share)	$ 0.82	$ 0.41
Basic earnings (loss) per common share - discontinued operations (in dollars per share)	0	0.15
Basic Earnings (Loss) Per Common Share (in dollars per share)	0.82	0.56
Diluted Earnings (Loss) Per Common Share [Abstract]
Diluted earnings per common share - continuing operations (in dollars per share)	0.82	0.43
Diluted earnings (loss) per common share - discontinued operations (in dollars per share)	0	0.13
Diluted Earnings (Loss) Per Common Share (in dollars per share)	$ 0.82	$ 0.56
Weighted Average Common Shares Outstanding, Basic	629,134	551,546
Weighted Average Common Shares Outstanding, Diluted	631,304	631,420