SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF PARENT - CASH FLOWS (Details) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Nov. 30, 2023	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by operating activities		$ 4,907	$ 6,218	$ 1,142
Expenditures for property, plant and equipment		(8,215)	(8,397)	(5,357)
Distributions from investments		1,093	912	854
Net cash used in investing activities		(9,118)	(8,716)	(5,039)
Common dividends paid		(1,499)	(1,483)	(1,430)
Preferred dividends paid		(44)	(44)	(44)
Issuances of common stock, net	$ 144	1,219	145	4
Repurchases of common stock		(43)	(32)	(478)
Issuances of debt (maturities greater than 90 days)		8,674	7,669	9,984
(Decrease) increase in short-term debt, net		(557)	552	(1,266)
Other		(56)	(85)	(35)
Net cash provided by financing activities		5,424	2,419	3,779
Effect of exchange rate changes on cash, cash equivalents and restricted cash		(13)	6	(1)
Increase (decrease) in cash, cash equivalents and restricted cash		1,200	(73)	(119)
Cash, cash equivalents and restricted cash, January 1		389	462	581
Cash, cash equivalents and restricted cash, December 31		1,589	389	462
SUPPLEMENTAL DISCLOSURE OF NONCASH INVESTING AND FINANCING ACTIVITIES
Accrued interest receivable capitalized to note receivable		17	16	16
Common dividends issued in stock		54	0	0
Net exercise of stock options		9	0	0
Common Stock
SUPPLEMENTAL DISCLOSURE OF NONCASH INVESTING AND FINANCING ACTIVITIES
Dividends payable		393	376	360
Preferred stock
SUPPLEMENTAL DISCLOSURE OF NONCASH INVESTING AND FINANCING ACTIVITIES
Dividends payable		11	11	11
Parent Company
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by operating activities		120	1,576	775
Expenditures for property, plant and equipment		(3)	(5)	(7)
Proceeds from sale of assets		0	2	0
Capital contributions to investees		(933)	(1,749)	(661)
Distributions from investments		9	108	0
Purchases of trust assets		(63)	(78)	(114)
Proceeds from sales of trust assets		68	69	123
Increase in loans to affiliates, net		(117)	(90)	(92)
Payment to Acquire Life Insurance Policy		(1)	(1)	(3)
Net cash used in investing activities		(1,040)	(1,744)	(754)
Common dividends paid		(1,499)	(1,483)	(1,430)
Preferred dividends paid		(44)	(44)	(44)
Issuances of common stock, net		1,219	145	4
Repurchases of common stock		(43)	(32)	(478)
Issuances of debt (maturities greater than 90 days)		3,695	1,918	1,569
Payments on debt (maturities greater than 90 days)		(350)	(672)	(322)
(Decrease) increase in short-term debt, net		(365)	(89)	(785)
(Decrease) increase in loans from affiliates, net		(241)	220	(226)
Proceeds from sales of noncontrolling interests, net		0	0	1,732
Other		(38)	(10)	(8)
Net cash provided by financing activities		2,334	(47)	12
Effect of exchange rate changes on cash, cash equivalents and restricted cash		(1)	0	(1)
Increase (decrease) in cash, cash equivalents and restricted cash		1,413	(215)	32
Cash, cash equivalents and restricted cash, January 1		5	220	188
Cash, cash equivalents and restricted cash, December 31		1,418	5	220
SUPPLEMENTAL DISCLOSURE OF NONCASH INVESTING AND FINANCING ACTIVITIES
Accrued interest receivable capitalized to note receivable		17	16	18
Common dividends issued in stock		54	0	0
Net exercise of stock options		9	0	0
Equitization of amounts due from affiliates		110	92	93
Parent Company | Common Stock
SUPPLEMENTAL DISCLOSURE OF NONCASH INVESTING AND FINANCING ACTIVITIES
Dividends payable		393	376	360
Parent Company | Preferred stock
SUPPLEMENTAL DISCLOSURE OF NONCASH INVESTING AND FINANCING ACTIVITIES
Dividends payable		$ 11	$ 11	$ 11