CONDENSED CONSOLIDATED BALANCE SHEETS (PARENTHETICAL) - USD ($)	Oct. 31, 2020	Jan. 31, 2020
Redeemable convertible preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Redeemable convertible preferred stock, shares authorized (in shares)	0	169,921,272
Redeemable convertible preferred stock, shares issued (in shares)	0	169,921,272
Redeemable convertible preferred stock, shares outstanding (in shares)	0	169,921,272
Redeemable convertible preferred stock, aggregate liquidation preference	$ 0	$ 935,389,000
Preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Preferred stock, shares authorized (in shares)	200,000,000	0
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Class A Common Stock
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	2,500,000,000	2,000
Common stock, shares issued (in shares)	40,503,350	0
Common stock, shares outstanding (in shares)	40,503,350	0
Class B Common Stock
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	355,000,000	312,000,000
Common stock, shares issued (in shares)	242,616,195	55,452,421
Common stock, shares outstanding (in shares)	242,616,195	55,452,421