Condensed Consolidated Statements of Shareholders' Equity - USD ($) shares in Thousands, $ in Millions	Total	Cumulative-effect adjustment from adoption of guidance on accounting for convertible instruments and contracts in an entity’s own equity	Class A Common Stock, Class B Common Stock and Class C Capital Stock	Additional Paid-In Capital	Additional Paid-In Capital Cumulative-effect adjustment from adoption of guidance on accounting for convertible instruments and contracts in an entity’s own equity	Accumulated Deficit	Accumulated Deficit Cumulative-effect adjustment from adoption of guidance on accounting for convertible instruments and contracts in an entity’s own equity	Accumulated Other Comprehensive Loss
Beginning Balance at Dec. 31, 2021	$ 5,341	$ (336)	$ 0	$ 7,001	$ (492)	$ (1,667)	$ 156	$ 7
Beginning Balance (in shares) at Dec. 31, 2021			250,630
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock Issued During Period, Value, Stock Options Exercised	42			42
Issuance of common and capital stock upon exercise of stock options (in shares)			995
Vesting of restricted stock units (in shares)			1,811
Share-based compensation expense	213			213
Repurchases of Class A common stock and Class C capital stock	(597)			(597)
Repurchases of Class A common stock and class c capital stock (in shares)			(12,295)
Net income (loss)	24					24
Other Comprehensive Income (Loss), Net of Tax	(20)							(20)
Ending Balance at Jun. 30, 2022	4,667		$ 0	6,167		(1,487)		(13)
Ending Balance (in shares) at Jun. 30, 2022			241,141
Beginning Balance at Mar. 31, 2022	4,802		$ 0	6,298		(1,495)		(1)
Beginning Balance (in shares) at Mar. 31, 2022			246,268
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock Issued During Period, Value, Stock Options Exercised	6			6
Issuance of common and capital stock upon exercise of stock options (in shares)			188
Vesting of restricted stock units (in shares)			1,122
Share-based compensation expense	112			112
Repurchases of Class A common stock and Class C capital stock	(249)			(249)
Repurchases of Class A common stock and class c capital stock (in shares)			(6,437)
Net income (loss)	8					8
Other Comprehensive Income (Loss), Net of Tax	(12)							(12)
Ending Balance at Jun. 30, 2022	4,667		$ 0	6,167		(1,487)		(13)
Ending Balance (in shares) at Jun. 30, 2022			241,141
Beginning Balance at Dec. 31, 2022	4,482		$ 0	6,109		(1,612)		(15)
Beginning Balance (in shares) at Dec. 31, 2022			234,268
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock Issued During Period, Value, Stock Options Exercised	$ 30			30
Issuance of common and capital stock upon exercise of stock options (in shares)	823		823
Vesting of restricted stock units (in shares)			2,921
Share-based compensation expense	$ 271			271
Repurchases of Class A common stock and Class C capital stock	(236)			(236)
Repurchases of Class A common stock and class c capital stock (in shares)			(5,289)
Net income (loss)	(57)					(57)
Other Comprehensive Income (Loss), Net of Tax	(4)							(4)
Ending Balance at Jun. 30, 2023	4,486		$ 0	6,174		(1,669)		(19)
Ending Balance (in shares) at Jun. 30, 2023			232,723
Beginning Balance at Mar. 31, 2023	4,520		$ 0	6,157		(1,634)		(3)
Beginning Balance (in shares) at Mar. 31, 2023			233,994
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock Issued During Period, Value, Stock Options Exercised	17			17
Issuance of common and capital stock upon exercise of stock options (in shares)			450
Vesting of restricted stock units (in shares)			1,556
Share-based compensation expense	150			150
Repurchases of Class A common stock and Class C capital stock	(150)			(150)
Repurchases of Class A common stock and class c capital stock (in shares)			(3,277)
Net income (loss)	(35)					(35)
Other Comprehensive Income (Loss), Net of Tax	(16)							(16)
Ending Balance at Jun. 30, 2023	$ 4,486		$ 0	$ 6,174		$ (1,669)		$ (19)
Ending Balance (in shares) at Jun. 30, 2023			232,723