CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ (DEFICIT) EQUITY - USD ($) $ in Millions		Total	Common stock		Additional paid-in capital	Accumulated other comprehensive income	Accumulated deficit	Redeemable convertible preferred stock
Balance at beginning of period, Redeemable convertible preferred stock (in shares) at Dec. 31, 2020								412,742,897
Balance at beginning of period, Redeemable convertible preferred stock at Dec. 31, 2020								$ 2,180
Balance at end of period, Redeemable convertible preferred stock (in shares) at Mar. 31, 2021								412,742,897
Balance at end of period, Redeemable convertible preferred stock at Mar. 31, 2021								$ 2,180
Balance at beginning of period, Common stock (in shares) at Dec. 31, 2020			229,031,546
Balance at beginning of period at Dec. 31, 2020		$ (55)	$ 0		$ 134	$ 1	$ (190)
Increase (decrease) in stockholder's equity
Net loss		(1,445)					(1,445)
Shares issued in connection with stock option exercise, net of repurchases (in shares)			3,225,828
Shares issued in connection with stock option exercise, net of repurchases		6			6
Vesting of early-exercised stock options		0
Change in other comprehensive income		0
Share-based compensation		9			9
Balance at end of period, Common stock (in shares) at Mar. 31, 2021			232,257,374
Balance at end of period at Mar. 31, 2021		(1,485)	$ 0		149	1	(1,635)
Balance at beginning of period, Redeemable convertible preferred stock (in shares) at Dec. 31, 2021								0
Balance at beginning of period, Redeemable convertible preferred stock at Dec. 31, 2021								$ 0
Balance at end of period, Redeemable convertible preferred stock (in shares) at Mar. 31, 2022								0
Balance at end of period, Redeemable convertible preferred stock at Mar. 31, 2022								$ 0
Balance at beginning of period, Common stock (in shares) at Dec. 31, 2021	[1]		863,912,613
Balance at beginning of period at Dec. 31, 2021		7,293	$ 0	[1]	11,169	1	(3,877)
Increase (decrease) in stockholder's equity
Net loss		(392)					(392)
Shares issued in connection with stock option exercise, net of repurchases (in shares)	[1]		1,438,358
Shares issued in connection with stock option exercise, net of repurchases		4			4
Issuance of common stock upon settlement of RSUs (in shares)	[1]		4,672,769
Shares withheld related to net share settlement (in shares)	[1]		(215,731)
Shares withheld related to net share settlement		(3)			(3)
Vesting of early-exercised stock options		0
Change in other comprehensive income		(1)				(1)
Share-based compensation		230			230
Balance at end of period, Common stock (in shares) at Mar. 31, 2022	[1]		869,808,009
Balance at end of period at Mar. 31, 2022		$ 7,131	$ 0	[1]	$ 11,400	$ 0	$ (4,269)

[1] The share amounts listed above combine common stock, Class A common stock and Class B common stock. In connection with the completion of our initial public offering, all previously outstanding shares of common stock were reclassified into Class A common stock and Class B common stock. Refer to Note 1 of the Annual Report on Form 10-K for the year ended December 31, 2021 for more information.