CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Millions	Total	COMMON STOCK	ADDITIONAL PAID-IN CAPITAL	ACCUMULATED OTHER COMPREHENSIVE LOSS	ACCUMULATED DEFICIT
Balance at beginning of period at Dec. 31, 2021		$ 1,024	$ 18,972	$ (2,158)	$ (6,061)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock through dividend reinvestment, incentive and benefit plans		11
Repurchases of common stock	$ (200)	(33)	(167)
Shares withheld to satisfy tax withholdings			(30)
Stock-based compensation and other, net			96
Dividends declared			(791)
Conversion to no-par stock value (Note 1)		0	0
Other			0
Other comprehensive income	1,059			1,059
Net loss	(1,548)				(1,548)
Balance at end of period at Dec. 31, 2022	$ 10,374	1,002	18,080	(1,099)	(7,609)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
DIVIDENDS DECLARED PER COMMON SHARE (in dollars per share)	$ 0.75
Issuance of common stock through dividend reinvestment, incentive and benefit plans		6
Repurchases of common stock		0	0
Shares withheld to satisfy tax withholdings			(5)
Stock-based compensation and other, net			50
Dividends declared			1
Conversion to no-par stock value (Note 1)		0	0
Other			0
Other comprehensive income	$ 289			289
Net loss	(10,298)				(10,298)
Balance at end of period at Dec. 31, 2023	$ 417	1,008	18,126	(810)	(17,907)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
DIVIDENDS DECLARED PER COMMON SHARE (in dollars per share)	$ 0
Issuance of common stock through dividend reinvestment, incentive and benefit plans		8
Repurchases of common stock		0	0
Shares withheld to satisfy tax withholdings			(6)
Stock-based compensation and other, net			27
Dividends declared			0
Conversion to no-par stock value (Note 1)		18,133	(18,133)
Other			(14)
Other comprehensive income	$ 87			87
Net loss	(55)				(55)
Balance at end of period at Dec. 31, 2024	$ 464	$ 19,149	$ 0	$ (723)	$ (17,962)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
DIVIDENDS DECLARED PER COMMON SHARE (in dollars per share)	$ 0