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, 2020			261,563,912	12,799,999
Beginning balance at Dec. 31, 2020	$ 3,004		$ 0	$ 0	$ 13,566	$ (10,097)	$ (1,781)	$ (178)	$ 1,494
Beginning balance (in shares) at Dec. 31, 2020						130,766,537
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	15						12		3
Other comprehensive income (loss), net of taxes	2							29	(27)
Payment of preferred dividends	(67)				(67)
Proceeds from exercise of equity instruments and employee stock purchase plans (in shares)			8,031,432
Proceeds from exercise of equity instruments and employee stock purchase plans	503				503
Exercise of common stock warrants (in shares)			5,065,381
Loss on redemption of preferred stock	(214)				(214)
Withholding taxes for stock options	(20)				(20)
Treasury stock activity related to vesting of equity instruments (in shares)						1,046,227
Treasury stock activity related to vesting of equity instruments	$ (165)					$ (165)
Common stock repurchases (in shares)	0
Adjustment to the fair value of redeemable non-controlling interests	$ 8						8
Other changes in ownership of non-controlling interests	21				(4)				25
Stock-based compensation expense	465				465
Ending balance (in shares) at Dec. 31, 2021			274,660,725	12,799,999
Ending balance at Dec. 31, 2021	3,552		$ 0	$ 0	14,229	$ (10,262)	(1,761)	(149)	1,495
Ending balance (in shares) at Dec. 31, 2021						131,812,764
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	343						352		(9)
Other comprehensive income (loss), net of taxes	(106)							(85)	(21)
Proceeds from exercise of equity instruments and employee stock purchase plans (in shares)			3,603,510
Proceeds from exercise of equity instruments and employee stock purchase plans	131				131
Treasury stock activity related to vesting of equity instruments (in shares)						768,173
Treasury stock activity related to vesting of equity instruments	$ (107)					$ (107)
Common stock repurchases (in shares)	5,200,000					5,202,492
Common stock repurchases	$ (500)					$ (500)
Other changes in ownership of non-controlling interests	4				24				(20)
Stock-based compensation expense	$ 411				411
Ending balance (in shares) at Dec. 31, 2022	147,757,000	5,523,000	278,264,235	12,799,999
Ending balance at Dec. 31, 2022	$ 3,728		$ 0	$ 0	14,795	$ (10,869)	(1,409)	(234)	1,445
Ending 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)	$ 688						797		(109)
Other comprehensive income (loss), net of taxes	27							25	2
Proceeds from exercise of equity instruments and employee stock purchase plans (in shares)			3,884,341
Proceeds from exercise of equity instruments and employee stock purchase plans	101				101
Withholding taxes for stock options	(7)				(7)
Treasury stock activity related to vesting of equity instruments (in shares)						973,946
Treasury stock activity related to vesting of equity instruments	$ (106)					$ (106)
Common stock repurchases (in shares)	19,100,000					19,145,610
Common stock repurchases	$ (2,031)					$ (2,031)
Other changes in ownership of non-controlling interests	(70)				16				(86)
Stock-based compensation expense	474				474
Other	$ (18)				19	(17)	(20)
Ending balance (in shares) at Dec. 31, 2023	131,522,000	5,523,000	282,148,576	12,799,999
Ending balance at Dec. 31, 2023	$ 2,786		$ 0	$ 0	$ 15,398	$ (13,023)	$ (632)	$ (209)	$ 1,252
Ending balance (in shares) at Dec. 31, 2023	157,903,000	7,300,000				157,902,985