CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Millions	Total	Class B common stock	Common stock	Common stock Class B common stock	Additional paid-in capital	Treasury stock - Common and Class B	Retained earnings (deficit)	Accumulated other comprehensive income (loss)	Non-redeemable non-controlling interest
Beginning balance (in shares) at Dec. 31, 2021			274,660,725	12,799,999
Beginning balance at Dec. 31, 2021	$ 3,552		$ 0	$ 0	$ 14,229	$ (10,262)	$ (1,761)	$ (149)	$ 1,495
Treasury stock, beginning balance (in shares) at Dec. 31, 2021						131,812,764
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (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
Stock-based compensation expense	97				97
Ending balance (in shares) at Mar. 31, 2022			276,329,170	12,799,999
Ending balance at Mar. 31, 2022	$ 3,567		$ 0	$ 0	14,431	$ (10,309)	(1,883)	(161)	1,489
Treasury stock, ending balance (in shares) at Mar. 31, 2022						132,051,439
Beginning balance (in shares) at Dec. 31, 2022	147,757,000	5,523,000	278,264,235	12,799,999
Beginning balance at Dec. 31, 2022	$ 3,728		$ 0	$ 0	14,795	$ (10,869)	(1,409)	(234)	1,445
Treasury stock, beginning balance (in shares) at Dec. 31, 2022	137,783,000	7,300,000				137,783,429
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ (140)						(145)		5
Other comprehensive income (loss), net of taxes	28							23	5
Proceeds from exercise of equity instruments and employee stock purchase plans (in shares)			832,904
Proceeds from exercise of equity instruments and employee stock purchase plans	29				29
Treasury stock activity related to vesting of equity instruments (in shares)						184,647
Treasury stock activity related to vesting of equity instruments	$ (21)					$ (21)
Common stock repurchases (in shares)	4,300,000					4,321,273
Common stock repurchases	$ (448)					$ (448)
Other changes in ownership of non-controlling interests	3								3
Stock-based compensation expense	114				114
Other	$ (3)					(3)
Ending balance (in shares) at Mar. 31, 2023	144,084,000	5,523,000	279,097,139	12,799,999
Ending balance at Mar. 31, 2023	$ 3,290		$ 0	$ 0	$ 14,938	$ (11,341)	$ (1,554)	$ (211)	$ 1,458
Treasury stock, ending balance (in shares) at Mar. 31, 2023	142,289,000	7,300,000				142,289,349