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, 2020		$ 1,097	$ 20,909	$ (2,813)	$ (8,094)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock through dividend reinvestment, incentive and benefit plans		8
Repurchases of common stock	$ (1,000)	(81)	(919)
Shares withheld to satisfy tax withholdings			(45)
Stock-based compensation and other, net			122
Dividends declared			(1,095)
Other comprehensive income	655			655
Net (loss) income	2,033				2,033
Balance at End of Period at Dec. 31, 2021	$ 11,777	1,024	18,972	(2,158)	(6,061)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
DIVIDENDS DECLARED PER COMMON SHARE (in dollars per share)	$ 1.00
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)
Other comprehensive income	1,059			1,059
Net (loss) income	(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
Other comprehensive income	$ 289			289
Net (loss) income	(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