Organization and Description of Business (Details) $ / shares in Units, $ in Millions		3 Months Ended	9 Months Ended
	Sep. 18, 2020 USD ($) $ / shares shares	Oct. 31, 2020 shares	Oct. 31, 2020 shares
Subsidiary, Sale of Stock [Line Items]
Net proceeds | $	$ 3,700.0
Conversion of redeemable convertible preferred stock to common stock upon initial public offering (in shares)		(182,271,099)	(182,271,099)
Class A Common Stock
Subsidiary, Sale of Stock [Line Items]
Number of shares issued (in shares)	32,200,000
Price per share (in dollars per share) | $ / shares	$ 120.00
Class A Common Stock | Over-Allotment Option
Subsidiary, Sale of Stock [Line Items]
Number of shares issued (in shares)	4,200,000
Class A Common Stock | Private Placement
Subsidiary, Sale of Stock [Line Items]
Price per share (in dollars per share) | $ / shares	$ 120.00
Net proceeds | $	$ 500.0
Class A Common Stock | Private Placement | Salesforce Ventures LLC
Subsidiary, Sale of Stock [Line Items]
Number of shares issued (in shares)	2,083,333
Class A Common Stock | Private Placement | Berkshire Hathaway Inc.
Subsidiary, Sale of Stock [Line Items]
Number of shares issued (in shares)	2,083,333
Redeemable Convertible Preferred Stock
Subsidiary, Sale of Stock [Line Items]
Conversion of redeemable convertible preferred stock to common stock upon initial public offering (in shares)	(182,271,099)
Class B Common Stock
Subsidiary, Sale of Stock [Line Items]
Conversion of redeemable convertible preferred stock to common stock upon initial public offering (in shares)	182,271,099
Conversion ratio	1