SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF PARENT - CASH FLOWS (Details) - USD ($) $ in Millions		12 Months Ended
	Nov. 10, 2023	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by operating activities		$ 6,218	$ 1,142	$ 3,842
Expenditures for property, plant and equipment		(8,397)	(5,357)	(5,015)
Proceeds from sale of assets		3	0	38
Disbursement for note receivable		0	0	(305)
Distributions from investments		912	854	941
Other		9	6	11
Net cash used in investing activities		(8,716)	(5,039)	(5,508)
Common dividends paid		(1,483)	(1,430)	(1,331)
Preferred dividends paid		(44)	(44)	(99)
Issuances of common stock, net	$ 144	145	4	5
Repurchases of common stock		(32)	(478)	(339)
Issuances of debt (maturities greater than 90 days)		7,669	9,984	3,773
Increase (decrease) in short-term debt, net		552	(1,266)	1,913
Purchases of noncontrolling interests		0	0	(224)
Other		(85)	(35)	(199)
Net cash provided by financing activities		2,419	3,779	1,260
Effect of exchange rate changes on cash, cash equivalents and restricted cash		6	(1)	2
(Decrease) increase in cash, cash equivalents and restricted cash		(73)	(119)	(404)
Cash and cash equivalents, January 1		462	581	985
Cash and cash equivalents, December 31		389	462	581
SUPPLEMENTAL DISCLOSURE OF NONCASH INVESTING AND FINANCING ACTIVITIES
Issuance of common stock in exchange for NCI and related AOCI		0	0	1,373
Conversion of mandatory convertible preferred stock		0	0	2,258
Common Stock
SUPPLEMENTAL DISCLOSURE OF NONCASH INVESTING AND FINANCING ACTIVITIES
Common dividends declared but not paid		376	360	349
Preferred stock
SUPPLEMENTAL DISCLOSURE OF NONCASH INVESTING AND FINANCING ACTIVITIES
Common dividends declared but not paid		11	11	11
Parent Company
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by operating activities		1,576	775	(255)
Expenditures for property, plant and equipment		(5)	(7)	(8)
Proceeds from sale of assets		2	0	0
Capital contributions to investees		(1,749)	(661)	(1,005)
Disbursement for note receivable		0	0	(305)
Distributions from investments		108	0	1,552
Purchases of trust assets		(78)	(114)	0
Proceeds from sales of trust assets		69	123	0
Increase in loans to affiliates, net		(90)	(92)	(20)
Other		(1)	(3)	0
Net cash used in investing activities		(1,744)	(754)	214
Common dividends paid		(1,483)	(1,430)	(1,331)
Preferred dividends paid		(44)	(44)	(99)
Issuances of common stock, net		145	4	5
Repurchases of common stock		(32)	(478)	(339)
Issuances of debt (maturities greater than 90 days)		1,918	1,569	990
Payments on debt (maturities greater than 90 days)		(672)	(322)	(3,200)
Increase (decrease) in short-term debt, net		(89)	(785)	1,240
Increase (decrease) in loans from affiliates, net		220	(226)	1,092
Purchases of noncontrolling interests		0	0	(217)
Proceeds from sale of noncontrolling interests		0	1,732	1,846
Make-whole premiums related to early redemptions of debt		0	0	(121)
Other		(10)	(8)	(2)
Net cash provided by financing activities		(47)	12	(136)
Effect of exchange rate changes on cash, cash equivalents and restricted cash		0	(1)	(1)
(Decrease) increase in cash, cash equivalents and restricted cash		(215)	32	(178)
Cash and cash equivalents, January 1		220	188	366
Cash and cash equivalents, December 31		5	220	188
SUPPLEMENTAL DISCLOSURE OF NONCASH INVESTING AND FINANCING ACTIVITIES
Issuance of common stock in exchange for NCI and related AOCI		0	0	1,373
Conversion of mandatory convertible preferred stock		0	0	2,258
Equitization of amounts due from affiliates		92	93	4,351
Interest capitalized to note receivable from unconsolidated affiliates		16	18	0
Parent Company | Common Stock
SUPPLEMENTAL DISCLOSURE OF NONCASH INVESTING AND FINANCING ACTIVITIES
Common dividends declared but not paid		376	360	349
Parent Company | Preferred stock
SUPPLEMENTAL DISCLOSURE OF NONCASH INVESTING AND FINANCING ACTIVITIES
Common dividends declared but not paid		$ 11	$ 11	$ 11