CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Millions	Total	Common stock	Common stock Class B common stock	Additional paid-in capital	Treasury stock	Retained earnings (deficit)	Accumulated other comprehensive income (loss)	Non-redeemable non-controlling interest
Beginning balance (in shares) at Dec. 31, 2020		261,563,912	12,799,999		130,766,537
Beginning balance at Dec. 31, 2020	$ 3,004	$ 0	$ 0	$ 13,566	$ (10,097)	$ (1,781)	$ (178)	$ 1,494
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(581)					(578)		(3)
Other comprehensive income (loss), net of taxes	(37)						(21)	(16)
Proceeds from exercise of equity instruments and employee stock purchase plans (in shares)		3,643,100
Proceeds from exercise of equity instruments and employee stock purchase plans	269			269
Withholding taxes for stock options	(7)			(7)
Treasury stock activity related to vesting of equity instruments (in shares)					374,806
Treasury stock activity related to vesting of equity instruments	(55)				$ (55)
Other changes in ownership of non-controlling interests	4			0				4
Stock-based compensation expense	91			91
Ending balance (in shares) at Mar. 31, 2021		265,207,012	12,799,999		131,141,343
Ending balance at Mar. 31, 2021	2,688	$ 0	$ 0	13,919	$ (10,152)	(2,359)	(199)	1,479
Beginning balance (in shares) at Dec. 31, 2021		274,660,725	12,799,999		131,812,764
Beginning balance at Dec. 31, 2021	3,552	$ 0	$ 0	14,229	$ (10,262)	(1,761)	(149)	1,495
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(123)					(122)		(1)
Other comprehensive income (loss), net of taxes	(17)						(12)	(5)
Proceeds from exercise of equity instruments and employee stock purchase plans (in shares)		1,668,445
Proceeds from exercise of equity instruments and employee stock purchase plans	101			101
Treasury stock activity related to vesting of equity instruments (in shares)					238,675
Treasury stock activity related to vesting of equity instruments	(47)				$ (47)
Other changes in ownership of non-controlling interests	4			4				0
Stock-based compensation expense	97			97
Ending balance (in shares) at Mar. 31, 2022		276,329,170	12,799,999		132,051,439
Ending balance at Mar. 31, 2022	$ 3,567	$ 0	$ 0	$ 14,431	$ (10,309)	$ (1,883)	$ (161)	$ 1,489