Net Loss per Share - Calculation (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Numerator:
Net loss	$ (1,542,590)	$ (463,157)	$ (696,885)
Less: premium on repurchase of redeemable convertible preferred units	0	(92,734)	(71,415)
Net loss attributable to Class A and Class B common stockholders	$ (1,542,590)	$ (555,891)	$ (768,300)
Denominator:
Weighted-average shares used in computing net loss per share attributable to Class A and Class B common stockholders, basic (in shares)	1,423,887	29,012	19,463
Weighted-average shares used in computing net loss per share attributable to Class A and Class B common stockholders, diluted (in shares)	1,423,887	29,012	19,463
Earnings Per Share, Basic and Diluted [Abstract]
Net loss attributable to Class A and Class B common stockholders per share, basic (in dollars per share)	$ (1.08)	$ (19.16)	$ (39.48)
Net loss attributable to Class A and Class B common stockholders per share, diluted (in dollars per share)	$ (1.08)	$ (19.16)	$ (39.48)