Consolidated Statements of Changes in Equity (Unaudited) - USD ($) $ in Millions	Total	Preferred Stock	Common Stock	Additional Paid-in Capital	Long-term Income Tax Receivable	Retained Earnings	Accumulated Other Comprehensive (Loss) Income, Net	Noncontrolling Interest
Balance at Dec. 31, 2021	$ 50,589	$ 1,650	$ 0	$ 6,374	$ (744)	$ 40,754	$ (1,340)	$ 3,895
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	2,302					1,926		376
Other comprehensive income (loss)	(1,043)						(1,043)
Long-term income tax receivable adjustments	0				744	(744)
Preferred stock redemptions	(800)	(800)
Preferred stock dividend	(37)					(37)
Common stock purchases	(870)			(77)		(793)
Distributions	(394)							(394)
Contributions	4							4
Other equity transactions	(6)			1		(13)		6
Balance at Sep. 30, 2022	49,745	850	0	6,298	0	41,093	(2,383)	3,887
Balance at Jun. 30, 2022	51,191	850	0	6,298	(744)	42,688	(1,788)	3,887
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(695)					(842)		147
Other comprehensive income (loss)	(595)						(595)
Long-term income tax receivable adjustments	0				744	(744)
Preferred stock dividend	(8)					(8)
Distributions	(149)							(149)
Contributions	2							2
Other equity transactions	(1)					(1)
Balance at Sep. 30, 2022	49,745	850	0	6,298	0	41,093	(2,383)	3,887
Balance at Dec. 31, 2022	50,639	850	0	6,298	0	41,833	(2,149)	3,807
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	2,879					2,558		321
Other comprehensive income (loss)	5						5
Preferred stock dividend	(25)					(25)
Distributions	(357)							(357)
Contributions	3							3
Purchase of Cove Point noncontrolling interest (Note 3)	(3,180)			(725)			(1)	(2,454)
Other equity transactions	(9)					(1)		(8)
Balance at Sep. 30, 2023	49,955	850	0	5,573	0	44,365	(2,145)	1,312
Balance at Jun. 30, 2023	52,960	850	0	6,298	0	43,880	(1,845)	3,777
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	571					494		77
Other comprehensive income (loss)	(299)						(299)
Preferred stock dividend	(8)					(8)
Distributions	(88)							(88)
Purchase of Cove Point noncontrolling interest (Note 3)	(3,180)			(725)			(1)	(2,454)
Other equity transactions	(1)					(1)
Balance at Sep. 30, 2023	$ 49,955	$ 850	$ 0	$ 5,573	$ 0	$ 44,365	$ (2,145)	$ 1,312