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)	239						251		(12)
Other comprehensive income, net of taxes	(17)							(14)	(3)
Proceeds from exercise of equity instruments and employee stock purchase plans (in shares)			2,712,495
Proceeds from exercise of equity instruments and employee stock purchase plans	48				48
Withholding taxes for stock options	(2)				(2)
Treasury stock activity related to vesting of equity instruments (in shares)						819,472
Treasury stock activity related to vesting of equity instruments	(100)					$ (100)
Common stock repurchases (in shares)						8,134,080
Common stock repurchases	(1,072)					$ (1,072)
Other changes in ownership of non-controlling interests	2				2
Stock-based compensation expense	251				251
Other	(9)					(9)
Ending balance (in shares) at Jun. 30, 2024			284,861,071	12,799,999
Ending balance at Jun. 30, 2024	2,126		$ 0	$ 0	15,697	$ (14,204)	(381)	(223)	1,237
Treasury stock, ending balance (in shares) at Jun. 30, 2024						166,856,537
Beginning balance (in shares) at Mar. 31, 2024			283,225,072	12,799,999
Beginning balance at Mar. 31, 2024	2,136		$ 0	$ 0	15,550	$ (13,671)	(767)	(222)	1,246
Treasury stock, beginning balance (in shares) at Mar. 31, 2024						162,494,746
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	375						386		(11)
Other comprehensive income, net of taxes	(2)							(1)	(1)
Proceeds from exercise of equity instruments and employee stock purchase plans (in shares)			1,635,999
Proceeds from exercise of equity instruments and employee stock purchase plans	16				16
Treasury stock activity related to vesting of equity instruments (in shares)						547,692
Treasury stock activity related to vesting of equity instruments	(63)					$ (63)
Common stock repurchases (in shares)						3,814,099
Common stock repurchases	(466)					$ (466)
Other changes in ownership of non-controlling interests	1				(2)				3
Stock-based compensation expense	133				133
Other	(4)					(4)
Ending balance (in shares) at Jun. 30, 2024			284,861,071	12,799,999
Ending balance at Jun. 30, 2024	$ 2,126		$ 0	$ 0	15,697	$ (14,204)	(381)	(223)	1,237
Treasury stock, ending balance (in shares) at Jun. 30, 2024						166,856,537
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)	$ 125						130		(5)
Other comprehensive income, net of taxes	55							45	10
Payment of dividends to stockholders (declared at $0.40 per share and $0.80 per share)	(102)						(102)
Proceeds from exercise of equity instruments and employee stock purchase plans (in shares)			1,840,705
Proceeds from exercise of equity instruments and employee stock purchase plans	25				25
Treasury stock activity related to vesting of equity instruments (in shares)						576,166
Treasury stock activity related to vesting of equity instruments	$ (105)					$ (105)
Common stock repurchases (in shares)	5,600,000					5,566,408
Common stock repurchases	$ (957)					$ (957)
Other changes in ownership of non-controlling interests	4				1				3
Stock-based compensation expense	248				248
Other	$ (6)					(6)
Ending balance (in shares) at Jun. 30, 2025	118,969,000	5,523,000	289,349,500	12,799,999
Ending balance at Jun. 30, 2025	$ 2,086		$ 0	$ 0	16,317	$ (15,924)	630	(187)	1,250
Treasury stock, ending balance (in shares) at Jun. 30, 2025	177,657,000	7,300,000				177,657,257
Beginning balance (in shares) at Mar. 31, 2025			288,477,142	12,799,999
Beginning balance at Mar. 31, 2025	$ 2,321		$ 0	$ 0	16,184	$ (15,243)	351	(220)	1,249
Treasury stock, beginning balance (in shares) at Mar. 31, 2025						173,533,787
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	322						330		(8)
Other comprehensive income, net of taxes	40							33	7
Payment of dividends to stockholders (declared at $0.40 per share and $0.80 per share)	(51)						(51)
Proceeds from exercise of equity instruments and employee stock purchase plans (in shares)			872,358
Proceeds from exercise of equity instruments and employee stock purchase plans	0
Treasury stock activity related to vesting of equity instruments (in shares)						299,177
Treasury stock activity related to vesting of equity instruments	(51)					$ (51)
Common stock repurchases (in shares)						3,824,293
Common stock repurchases	(627)					$ (627)
Other changes in ownership of non-controlling interests	3				1				2
Stock-based compensation expense	132				132
Other	$ (3)					(3)
Ending balance (in shares) at Jun. 30, 2025	118,969,000	5,523,000	289,349,500	12,799,999
Ending balance at Jun. 30, 2025	$ 2,086		$ 0	$ 0	$ 16,317	$ (15,924)	$ 630	$ (187)	$ 1,250
Treasury stock, ending balance (in shares) at Jun. 30, 2025	177,657,000	7,300,000				177,657,257