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Document and Entity Information - USD ($)
$ in Millions
 12 Months Ended
Mar. 31, 2022
Jul. 29, 2022
Sep. 30, 2021
Document Information [Line Items]      
Document Type 10-K/A    
Amendment Flag true    
Document Fiscal Period Focus FY    
Document Period End Date Mar. 31, 2022    
Document Fiscal Year Focus 2022    
Document Annual Report true    
Document Transition Report false    
Entity Registrant Name 23ANDME HOLDING CO.    
Entity Central Index Key 0001804591    
Entity File Number 001-39587    
Entity Tax Identification Number 87-1240344    
Entity Incorporation, State or Country Code DE    
Current Fiscal Year End Date --03-31    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
ICFR Auditor Attestation Flag false    
Entity Shell Company false    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
Entity Address, Address Line One 349 Oyster Point Boulevard    
Entity Address, City or Town South San Francisco    
Entity Address, State or Province CA    
Entity Address, Postal Zip Code 94080    
Local Phone Number 938-6300    
City Area Code 650    
Title of 12(b) Security Class A common stock, $0.0001 par value per share    
Trading Symbol ME    
Security Exchange Name NASDAQ    
Entity Public Float     $ 820
Documents Incorporated by Reference [Text Block]

No documents are incorporated by reference into this Amendment No. 1 on Form 10-K/A.

    
Auditor Firm ID 185    
Auditor Name KPMG LLP    
Auditor Location Santa Clara, California    
Amendment Description 23andMe Holding Co. (the “Company”) is filing this Amendment No. 1 on Form 10-K/A (this “Amendment”) to its Annual Report on Form 10-K for the fiscal year ended March 31, 2022 (the “Original Filing” and, together with this Amendment, the “Form 10-K Filings”), which was filed with the Securities and Exchange Commission (the “SEC”) on May 27, 2022 (the “Original Filing Date”), to amend and restate Part II, Item 9A, “Controls and Procedures,” with respect to the conclusion of management regarding the effectiveness of the Company’s disclosure controls and procedures as of March 31, 2022. In accordance with Rule 12b-15 under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), the Company is also including in this Amendment an amended and restated Part IV, Item 15 to include currently dated certifications pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 (“SOX”) from the Company’s principal executive officer and principal financial officer. Because no financial statements have been included in this Amendment, paragraph 3 of the certifications has been omitted. Similarly, the Company is not including certifications under Section 906 of SOX, as no financial statements are being filed with this Amendment.This Amendment speaks as of the Original Filing Date of the Original Filing (unless otherwise noted or as the context otherwise requires) and reflects only the changes to the cover page, Item 9A of Part II, and the Exhibit Index in Item 15 of Part IV. No other information included in the Original Filing has been modified or updated in any way. The Original Filing continues to speak as of the Original Filing Date, and the Company has not updated the disclosures contained therein to reflect any events which occurred at a date subsequent to the Original Filing Date other than as expressly indicated in this Amendment. Accordingly, this Amendment should be read in conjunction with the Original Filing and the Company’s other SEC filings.In this Amendment, 23andMe Holding Co. (together with its subsidiaries) is referred to as the “Company,” “we,” “us,” or “our.”    
Class A Common Stock [Member]      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   259,768,376  
Class B Common Stock [Member]      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   191,756,521