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, 2023			282,148,576	12,799,999
Beginning balance at Dec. 31, 2023	$ 2,786		$ 0	$ 0	$ 15,398	$ (13,023)	$ (632)	$ (209)	$ 1,252
Treasury stock, beginning balance (in shares) at Dec. 31, 2023						157,902,985
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(136)						(135)		(1)
Other comprehensive income, net of taxes	(15)							(13)	(2)
Proceeds from exercise of equity instruments and employee stock purchase plans (in shares)			1,076,496
Proceeds from exercise of equity instruments and employee stock purchase plans	32				32
Withholding taxes for stock options	(2)				(2)
Treasury stock activity related to vesting of equity instruments (in shares)						271,780
Treasury stock activity related to vesting of equity instruments	(37)					$ (37)
Common stock repurchases (in shares)						4,319,981
Common stock repurchases	(606)					$ (606)
Other changes in ownership of non-controlling interests	1				4				(3)
Stock-based compensation expense	118				118
Other	(5)					(5)
Ending balance (in shares) at Mar. 31, 2024			283,225,072	12,799,999
Ending balance at Mar. 31, 2024	$ 2,136		$ 0	$ 0	15,550	$ (13,671)	(767)	(222)	1,246
Treasury stock, ending balance (in shares) at Mar. 31, 2024						162,494,746
Beginning balance (in shares) at Dec. 31, 2024	123,271,000	5,523,000	287,508,795	12,799,999
Beginning balance at Dec. 31, 2024	$ 2,799		$ 0	$ 0	16,043	$ (14,856)	602	(232)	1,242
Treasury stock, beginning balance (in shares) at Dec. 31, 2024	171,515,000	7,300,000				171,514,683
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ (197)						(200)		3
Other comprehensive income, net of taxes	15							12	3
Payment of dividends to stockholders (declared at $0.40 per share)	(51)						(51)
Proceeds from exercise of equity instruments and employee stock purchase plans (in shares)			968,347
Proceeds from exercise of equity instruments and employee stock purchase plans	25				25
Treasury stock activity related to vesting of equity instruments (in shares)						276,989
Treasury stock activity related to vesting of equity instruments	$ (54)					$ (54)
Common stock repurchases (in shares)	1,700,000					1,742,115
Common stock repurchases	$ (330)					$ (330)
Other changes in ownership of non-controlling interests	1								1
Stock-based compensation expense	116				116
Other	$ (3)					(3)
Ending balance (in shares) at Mar. 31, 2025	122,220,000	5,523,000	288,477,142	12,799,999
Ending balance at Mar. 31, 2025	$ 2,321		$ 0	$ 0	$ 16,184	$ (15,243)	$ 351	$ (220)	$ 1,249
Treasury stock, ending balance (in shares) at Mar. 31, 2025	173,534,000	7,300,000				173,533,787