Schedule I - Condensed Financial Information - Income and Comprehensive Income (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Condensed Income Statements,Captions [Line Items]
Taxes, other than income taxes	$ (3,280)	$ (3,043)	$ (3,005)
Interest expense	(1,187)	(1,023)	(852)
Income tax benefit (expense)	(318)	(487)	(498)
Gain (Loss) on the sale of the Clean Energy Businesses	(62)	865	0
NET INCOME FOR COMMON STOCK	1,820	2,519	1,660
Comprehensive Income	$ 1,827	$ 2,519	$ 1,677
Net Income Per Share – Basic (in dollars per share)	$ 5.26	$ 7.25	$ 4.68
Net Income Per Share – Diluted (in dollars per share)	5.24	7.21	4.66
Dividends Declared Per Share (in dollars per share)	$ 3.32	$ 3.24	$ 3.16
Average Number Of Shares Outstanding—Basic (in shares)	346.0	347.7	354.5
Average Number Of Shares Outstanding—Diluted (in shares)	347.3	349.3	355.8
Parent Company
Condensed Income Statements,Captions [Line Items]
Equity in earnings of subsidiaries	$ 1,904	$ 1,759	$ 1,860
Other operating and maintenance expenses	(1)	0	(1)
Taxes, other than income taxes	(12)	(2)	(7)
Other income (deductions)	(14)	7	(31)
Interest expense	(18)	(14)	(32)
Income tax benefit (expense)	23	(96)	(129)
Gain (Loss) on the sale of the Clean Energy Businesses	(62)	865	0
NET INCOME FOR COMMON STOCK	1,820	2,519	1,660
Comprehensive Income	$ 1,827	$ 2,520	$ 1,677
Net Income Per Share – Basic (in dollars per share)	$ 5.26	$ 7.25	$ 4.68
Net Income Per Share – Diluted (in dollars per share)	5.24	7.21	4.66
Dividends Declared Per Share (in dollars per share)	$ 3.32	$ 3.24	$ 3.16
Average Number Of Shares Outstanding—Basic (in shares)	346.0	347.7	354.5
Average Number Of Shares Outstanding—Diluted (in shares)	347.3	349.3	355.8