SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF PARENT - CASH FLOWS (Details) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Nov. 30, 2023	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by operating activities		$ 4,565	$ 4,907	$ 6,218
Expenditures for property, plant and equipment		(10,612)	(8,215)	(8,397)
Distributions from investments		1,120	1,093	912
Net cash used in investing activities		(12,537)	(9,118)	(8,716)
Common dividends paid		(1,603)	(1,499)	(1,483)
Preferred dividends paid		(40)	(44)	(44)
Redemption of preferred stock		(900)	0	0
Issuances of common stock, net	$ 144	32	1,219	145
Repurchases of common stock		(58)	(43)	(32)
Issuances of debt (maturities greater than 90 days)		11,282	8,674	7,669
Increase (decrease) in short-term debt, net		1,262	(557)	552
Other		(93)	(56)	(85)
Net cash (used in) provided by financing activities		9,930	5,424	2,419
Effect of exchange rate changes on cash, cash equivalents and restricted cash		5	(13)	6
(Decrease) increase in cash, cash equivalents and restricted cash		1,963	1,200	(73)
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Accrued interest receivable capitalized to note receivable		18	17	16
Change in equity related to allocation of interests, net of tax		1,771	0	0
Preferred deemed dividends		11	0	0
Common dividends issued in stock		52	54	0
Preferred stock
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Dividends payable		0	11	11
Common Stock
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Dividends payable		421	393	376
Parent Company
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by operating activities		1,007	120	1,576
Expenditures for property, plant and equipment		(6)	(3)	(5)
Proceeds from sale of assets		0	0	2
Capital contributions to investees		(831)	(933)	(1,749)
Distributions from investments		351	9	108
Purchases of trust assets		(105)	(63)	(78)
Proceeds from sales of trust assets		124	68	69
Increase in loans to affiliates, net		(1,553)	(117)	(90)
Other		(9)	(1)	(1)
Net cash used in investing activities		(2,029)	(1,040)	(1,744)
Common dividends paid		(1,603)	(1,499)	(1,483)
Preferred dividends paid		(40)	(44)	(44)
Redemption of preferred stock		(900)	0	0
Issuances of common stock, net		32	1,219	145
Repurchases of common stock		(58)	(43)	(32)
Issuances of debt (maturities greater than 90 days)		2,550	3,695	1,918
Payments on debt (maturities greater than 90 days)		(750)	(350)	(672)
Increase (decrease) in short-term debt, net		982	(365)	(89)
(Decrease) increase in loans from affiliates, net		(595)	(241)	220
Other		(10)	(38)	(10)
Net cash (used in) provided by financing activities		(392)	2,334	(47)
Effect of exchange rate changes on cash, cash equivalents and restricted cash		0	(1)	0
(Decrease) increase in cash, cash equivalents and restricted cash		(1,414)	1,413	(215)
Cash, cash equivalents and restricted cash, January 1		1,418	5	220
Cash, cash equivalents and restricted cash, December 31		4	1,418	5
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Accrued interest receivable capitalized to note receivable		18	17	16
Increase In Equity Related To CRNCI Activities		1,089	0	0
Preferred deemed dividends		11	0	0
Common dividends issued in stock		52	54	0
Equitization of amounts due from affiliates		56	110	92
Parent Company | Preferred stock
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Dividends payable		0	11	11
Parent Company | Common Stock
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Dividends payable		$ 421	$ 393	$ 376