Cover Page - shares	9 Months Ended
	Sep. 30, 2021	Nov. 09, 2021
Document Type	10-Q/A
Amendment Flag	true
Document Period End Date	Sep. 30, 2021
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q3
Entity Registrant Name	SVF INVESTMENT CORP. 3
Entity File Number	001-40175
Entity Central Index Key	0001837240
Entity Incorporation, State or Country Code	E9
Current Fiscal Year End Date	--12-31
Document Quarterly Report	true
Document Transition Report	false
Entity Current Reporting Status	No
Entity Shell Company	true
Entity Filer Category	Non-accelerated Filer
Trading Symbol	SVFC
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Tax Identification Number	98-1572401
Entity Interactive Data Current	Yes
Entity Address, Address Line One	1 Circle Star Way
Entity Address, City or Town	San Carlos
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	94070
City Area Code	650
Local Phone Number	562 - 8100
Title of 12(b) Security	Class A ordinary shares, par value $0.0001 per share
Security Exchange Name	NASDAQ
Amendment Description	References throughout this Amendment No. 1 to the Quarterly Report on Form 10-Q to “we,” “us,” the “Company” or “our company” are to SVF Investment Corp. 3, formerly known as SVF Investment III Corp., unless the context otherwise indicates. This Amendment No. 1 (“Amendment No. 1”) to the Quarterly Report on Form 10-Q/A amends the Quarterly Report on Form 10-Q of SVF Investment Corp. 3 (the “Company”) as of and for the period ended September 30, 2021, as filed with the Securities and Exchange Commission (“SEC”) on November 9, 2021 (the “First Amended Filing”).Following the filing of the quarterly report for the period ended September 30, 2021, filed with the SEC on November 9, 2021, the Company, having performed further assessment, concluded that, effective with its financial statements for quarterly period ended September 30, 2021, it should restate its prior filed financial information for the period ended March 31, 2021, to classify all Class A ordinary shares subject to possible redemption in temporary equity and to recognize the accretion from the initial book value to the redemption value, and it should restate its prior filed financial information for the period ended June 30, 2021, to correct the recognition of the accretion from the initial book value to redemption value. In accordance with guidance on redeemable equity instruments in ASC 480-10-S99, redemption provisions not solely within the control of the Company require ordinary shares subject to redemption to be classified outside of permanent equity. Previously, the Company had revised its financial information to classify all Class A ordinary shares subject to possible redemption in temporary equity. In addition, effective with its financial statements for quarterly period ended September 30, 2021, the Company determined it should restate its earnings per share calculation to allocate income and loss shared pro rata between Class A ordinary shares subject to possible redemption and non-redeemable ordinary shares for the Affected Periods (as defined below). Therefore, on November 30, 2021, the Company’s management and the audit committee of the Company’s board of directors (the “Audit Committee”) concluded that the Company’s previously issued (i) unaudited interim financial information included in the Company’s Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2021, filed with the SEC on May 13, 2021; (ii) unaudited interim financial information included in the Company’s Quarterly Report on Form 10-Q for the quarterly period ended June 30, 2021, filed with the SEC on August 11, 2021; and (iii) unaudited interim financial information included in the Company’s Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2021, filed with the SEC on November 9, 2021 (collectively, the “Affected Periods”), should be restated to classify all Class A ordinary shares subject to possible redemption in temporary equity and, where applicable, to restate its earnings per share calculation to allocate income and loss shared pro rata between Class A ordinary shares subject to possible redemption and non-redeemable ordinary shares. and should no longer be relied upon. As such, the Company will restate its financial information for the Affected Periods. The unaudited condensed financial information for the periods ended March 31, 2021, June 30, 2021 and September 30, 2021 will be amended in the Company’s Quarterly Report on Form 10-Q/A for the quarterly periods ended March 31, 2021, June 30, 2021 and September 30, 2021 (collectively, the “Forms 10-Q/A”). Considering such restatement, such financial information as well as the relevant portions of any communication which describes or are based on such financial information, should no longer be relied upon. The restatement does not have an impact on the Company’s cash position and cash held in the trust account established in connection with the IPO (the “Trust Account”). The Company’s management has concluded that a material weakness exists in the Company’s internal control over accounting for complex financial instruments and that the Company’s disclosure controls and procedures were not effective during the Affected Periods. The Company’s remediation plan with respect to such material weakness will be described in more detail in Item 4 of Part 1 to the Forms 10-Q/A.
Common Class A [Member]
Entity Common Stock, Shares Outstanding		33,040,000
Common Class B [Member]
Entity Common Stock, Shares Outstanding		8,000,000