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, 2019			256,691,777	12,799,999
Beginning balance at Dec. 31, 2019	$ 5,536		$ 0	$ 0	$ 12,978	$ (9,673)	$ 879	$ (217)	$ 1,569
Beginning balance (in shares) at Dec. 31, 2019						126,892,525
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss (income)	(2,728)						(2,612)		(116)
Other comprehensive income (loss), net of taxes	67							39	28
Payment of dividends to common stockholders	(48)						(48)
Payment of preferred dividends	(75)				(75)
Proceeds from exercise of equity instruments and employee stock purchase plans (in shares)			4,872,135
Proceeds from exercise of equity instruments and employee stock purchase plans	319		$ 0		319
Common stock warrants, net of issuance costs	110				110
Treasury stock activity related to vesting of equity instruments (in shares)						489,263
Treasury stock activity related to vesting of equity instruments	$ (54)					$ (54)
Common stock repurchases (in shares)	3,400,000					3,364,119
Common stock repurchases	$ (370)					$ (370)
Adjustment to the fair value of redeemable non-controlling interests	4				4
Other changes in ownership of non-controlling interests	17				4				13
Stock-based compensation expense	225				225
Other	1				1
Other (in shares)						20,630
Ending balance (in shares) at Dec. 31, 2020			261,563,912	12,799,999
Ending balance at Dec. 31, 2020	3,004		$ 0	$ 0	13,566	$ (10,097)	(1,781)	(178)	1,494
Ending balance (in shares) at Dec. 31, 2020						130,766,537
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss (income)	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		$ 0		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	150,125,000	5,523,000	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	131,813,000	7,300,000				131,812,764
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss (income)	$ 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