Related Party Transactions - Additional Information (Detail) - USD ($)			3 Months Ended	9 Months Ended	12 Months Ended
	Jan. 12, 2021	Oct. 10, 2020	Sep. 30, 2021	Sep. 30, 2021	Dec. 31, 2020	Aug. 01, 2021	Nov. 13, 2020	Oct. 07, 2020
Shares Issued, Shares, Share-based Payment Arrangement, Forfeited
Due to related parties current			$ 479,334	$ 479,334
Proceeds from related party				2,000,000
Proceeds from initial public offer				$ 603,750,000	$ 296,000
IPO [Member]
Shares Issued, Shares, Share-based Payment Arrangement, Forfeited
Stock Issued During Period, Shares, New Issues	60,375,000
Stock repurchased during period, shares	2,527,000
Proceeds from initial public offer	$ 603,800,000
IPO [Member] \| Maximum [Member]
Shares Issued, Shares, Share-based Payment Arrangement, Forfeited
Stock repurchased during period, shares				3,000,000
Founder Shares [Member]
Shares Issued, Shares, Share-based Payment Arrangement, Forfeited
Temporary equity shares outstanding	1,968,750
Founder Shares [Member] \| IPO [Member]
Shares Issued, Shares, Share-based Payment Arrangement, Forfeited
Common stock, threshold percentage on conversion of shares		20.00%
Sponsor [Member]
Shares Issued, Shares, Share-based Payment Arrangement, Forfeited
Due to related parties current			80,000	$ 80,000	0
Related party transaction amount of transaction			30,000
Due from Related Parties			5,000	5,000	0
Due to Sponsor Affiliate, Current			399,000	399,000	0
Line of Credit Facility, Remaining Borrowing Capacity						$ 1,000,000
Sponsor [Member] \| Office Space Administrative And Support Services [Member]
Shares Issued, Shares, Share-based Payment Arrangement, Forfeited
Related party transaction amount of transaction				10,000
Sponsor [Member] \| General and Administrative Expense [Member]
Shares Issued, Shares, Share-based Payment Arrangement, Forfeited
Related party transaction amount of transaction				80,000
Sponsor [Member] \| Promissory Note [Member]
Shares Issued, Shares, Share-based Payment Arrangement, Forfeited
Debt Instrument, Face Amount								$ 300,000
Proceeds from related party					173,000
Proceeds from initial public offer					$ 296,000
Sponsor [Member] \| Founder Shares [Member]
Shares Issued, Shares, Share-based Payment Arrangement, Forfeited
Shares Issued, Shares, Share-based Payment Arrangement, Forfeited		1,968,750
Sponsor [Member] \| Founder Shares [Member] \| Independent Directors [Member]
Shares Issued, Shares, Share-based Payment Arrangement, Forfeited
Stock Issued During Period, Shares, New Issues		150,000
Working Capital Loans [Member]
Shares Issued, Shares, Share-based Payment Arrangement, Forfeited
Due to related parties current			2,000,000.0	2,000,000.0
Debt Instrument Convertible Into Warrants								$ 2,000,000.0
Debt Instrument Conversion Price								$ 1.50
Working Capital Loan—Related Party [Member]
Shares Issued, Shares, Share-based Payment Arrangement, Forfeited
Due to related parties current			$ 2,300,000	$ 2,300,000
Common Class B [Member] \| Founder Shares [Member]
Shares Issued, Shares, Share-based Payment Arrangement, Forfeited
Temporary equity shares outstanding							15,093,750
Common Class B [Member] \| Sponsor [Member] \| Founder Shares [Member]
Shares Issued, Shares, Share-based Payment Arrangement, Forfeited
Stock Issued During Period, Shares, New Issues		11,500,000
Stock Issued During Period, Value, Issued for Services		$ 25,000
Common Class A [Member]
Shares Issued, Shares, Share-based Payment Arrangement, Forfeited
Temporary equity shares outstanding			60,375,000	60,375,000	0
Common Class A [Member] \| Sponsor [Member] \| Share Price More Than Or Equals To USD Twelve [Member]
Shares Issued, Shares, Share-based Payment Arrangement, Forfeited
Share transfer, trigger price price per share.			$ 12.00	$ 12.00
Number of consecutive trading days for determining share price				20 days
Number Of Trading Days For Determining Share Price				30 days
Threshold Number Of Trading Days For Determining Share PriceFrom Date Of Business Combination				150 days

SVF Investment Corp. 10-Q/A