Condensed Consolidated Statements of Changes in Equity - USD ($) $ in Millions		Total	Total Stockholders' Equity	Preferred Stock	Common Stock	Treasury Stock	Additional Paid-In Capital	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interest in Subsidiary
Beginning balance at Dec. 31, 2023		$ 5,322	$ 5,307	$ 2,476	$ 5	$ (4,662)	$ 10,095	$ (2,613)	$ 6	$ 15
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock repurchases		(285)	(285)			(285)
Effects of stock-based incentive compensation plans	[1]	35	35				35
Equity issued in subsidiary to acquire Energy Harbor	[2]	2,307	747				747			1,560
Net income (loss)		18	(35)					(35)		53
Dividends declared on common stock		(77)	(77)					(77)
Dividends declared on preferred stock		(37)	(37)					(37)
Other		1	1				1
Ending balance at Mar. 31, 2024		7,284	5,656	2,476	5	(4,947)	10,878	(2,762)	6	1,628
Beginning balance at Dec. 31, 2024		5,583	5,570	2,476	5	(5,912)	9,435	(454)	20	13
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock repurchases		(336)	(336)			(336)
Effects of stock-based incentive compensation plans	[1]	(27)	(27)				(27)
Net income (loss)		(268)	(268)					(268)
Dividends declared on common stock		(75)	(75)					(75)
Dividends declared on preferred stock		(38)	(38)					(38)
Other		(1)	(1)				(1)
Ending balance at Mar. 31, 2025		$ 4,838	$ 4,825	$ 2,476	$ 5	$ (6,248)	$ 9,407	$ (835)	$ 20	$ 13

[1] Includes cash payments to cover tax withholding obligations upon the vesting of stock-based incentive compensation plans of $50 million and $12 million for the three months ended March 31, 2025 and 2024, respectively.

[2] See Note 2 for additional information regarding activity associated with noncontrolling interest.