CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (UNAUDITED) - 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)	$ (8,031)
Increase (Decrease) in Stockholders' Equity
Issuance of common stock through incentive and benefit plans		9
Shares withheld to satisfy tax withholdings			(39)
Stock-based compensation and other, net			20
Dividends declared			(292)
Other comprehensive income (loss)	$ (32)			(32)
Net income	475				475
Balance at end of period at Mar. 31, 2021	$ 11,303	1,106	20,598	(2,845)	(7,556)
Increase (Decrease) in Stockholders' Equity
DIVIDENDS DECLARED PER COMMON SHARE (in dollars per share)	$ 0.25
Balance at beginning of period at Dec. 31, 2021	$ 11,840	1,024	18,972	(2,158)	(5,998)
Increase (Decrease) in Stockholders' Equity
Issuance of common stock through incentive and benefit plans		9
Shares withheld to satisfy tax withholdings			(28)
Stock-based compensation and other, net			23
Dividends declared			(272)
Other comprehensive income (loss)	111			111
Net income	599				599
Balance at end of period at Mar. 31, 2022	$ 12,282	$ 1,033	$ 18,695	$ (2,047)	$ (5,399)
Increase (Decrease) in Stockholders' Equity
DIVIDENDS DECLARED PER COMMON SHARE (in dollars per share)	$ 0.25