Common Stock and Warrants - Additional Information (Detail) $ / shares in Units, $ in Thousands		3 Months Ended		6 Months Ended
	Jun. 16, 2021 Vote $ / shares shares	Jun. 30, 2021 USD ($) $ / shares shares	Jun. 30, 2020 USD ($)	Jun. 30, 2021 $ / shares shares	Mar. 31, 2021 $ / shares shares
Class Of Stock [Line Items]
Stock split description	Each share of Class B common stock is convertible into one share of Class A common stock any time at the option of the holder, and is automatically converted into one share of Class A common stock upon transfer	The shares and net loss per common share prior to the Merger have been retroactively restated as shares reflecting the exchange ratio established in the Merger (each outstanding share of 23andMe, Inc. Class A common stock was exchanged for 2.293698169 shares of the Company’s Class A common stock, and each outstanding share of 23andMe, Inc. Class B common stock, including all shares of 23andMe, Inc. preferred stock (which were converted to shares of 23andMe, Inc. Class B common stock immediately prior to the Merger), was exchanged for 2.293698169 shares of the Company’s Class B common stock).
Common stock, shares authorized	1,490,000,000
Preferred stock, shares authorized	10,000,000
Preferred stock, par value | $ / shares	$ 0.0001
Preferred stock, shares issued		0		0
Preferred stock, shares outstanding		0		0
Proceeds from issuance of common stock | $		$ 309,720	$ 0
Warrants exercised		0		0
Public Warrants
Class Of Stock [Line Items]
Expiration				5 years
Public Warrants
Class Of Stock [Line Items]
Class of Warrant or Right Redemption Threshold Trading Days		10 days
Class A Common Stock [Member]
Class Of Stock [Line Items]
Common Stock, Par value | $ / shares	$ 0.0001	$ 0.0001		$ 0.0001	$ 0.0001
Exchange Ratio	2.293698169	2.293698169
Common stock, shares authorized	1,140,000,000	1,140,000,000		1,140,000,000
Number of votes | Vote	1
Common Stock, Shares, Issued		92,672,510		92,672,510	20,713,076
Common Stock, Shares, Outstanding		92,672,510		92,672,510	20,713,076
Trading days	20 days	20 days
Share Redemption Trigger Price | $ / shares		$ 18.00		$ 18.00
Class A Common Stock [Member] | The Anne Wojcicki Foundation [Member]
Class Of Stock [Line Items]
Common stock shares subscribed		2,500,000		2,500,000
Class A Common Stock [Member] | Private Placement Warrants
Class Of Stock [Line Items]
Number of Warrants		8,113,999		8,113,999
Exercise price | $ / shares		$ 11.50		$ 11.50
Number of Days after the completion of an initial business combination		30 days
Class of Warrant or Right Redemption Threshold Trading Days		10 days
Class of warrants or rights redemption price per warrant | $ / shares		$ 10.00		$ 10.00
Class A Common Stock [Member] | Public Warrants
Class Of Stock [Line Items]
Warrants exercisable days		90 days
Number of Warrants		16,951,609		16,951,609
Exercise price | $ / shares		$ 11.50		$ 11.50
Class A Common Stock [Member] | 23andMe, Inc [Member]
Class Of Stock [Line Items]
Common Stock, Par value | $ / shares		$ 0.00001		$ 0.00001
Class A Common Stock [Member] | VG Acquisition Sponsor LLC [Member]
Class Of Stock [Line Items]
Expiry date		5 years		5 years
Class A Common Stock [Member] | VG Acquisition Sponsor LLC [Member] | Private Placement Warrants
Class Of Stock [Line Items]
Number of Warrants		8,113,999		8,113,999
Exercise price | $ / shares		$ 11.50		$ 11.50
Class A Common Stock [Member] | VG Acquisition Sponsor LLC [Member] | Public Warrants
Class Of Stock [Line Items]
Number of Warrants		16,951,609		16,951,609
Exercise price | $ / shares		$ 11.50		$ 11.50
Class A Common Stock [Member] | PIPE
Class Of Stock [Line Items]
Common Stock, Par value | $ / shares		$ 10.00		$ 10.00
Common stock shares subscribed		25,000,000		25,000,000
Proceeds from issuance of common stock | $		$ 250,000,000,000
Class B Common Stock [Member]
Class Of Stock [Line Items]
Common Stock, Par value | $ / shares	$ 0.0001	$ 0.0001		$ 0.0001	$ 0.0001
Exchange Ratio	2.293698169	2.293698169
Common stock, shares authorized	350,000,000	350,000,000		350,000,000
Number of votes | Vote	10
Common Stock, Shares, Issued		313,759,355		313,759,355	103,816,706
Common Stock, Shares, Outstanding		313,759,355		313,759,355	103,816,706
Class B Common Stock [Member] | 23andMe, Inc [Member]
Class Of Stock [Line Items]
Common Stock, Par value | $ / shares		$ 0.00001		$ 0.00001
Class B Common Stock [Member] | VG Acquisition Sponsor LLC [Member]
Class Of Stock [Line Items]
Common Stock, Shares, Outstanding	3,814,125
Trading days	20 days
Common Class C [Member]
Class Of Stock [Line Items]
Common Stock, Shares, Outstanding		0		0
Share Price Less Than Dollar Eighteen And Greater Than Or Equals To Ten Point Zero Zero | Class A Common Stock [Member] | Public Warrants
Class Of Stock [Line Items]
Exercise price | $ / shares		$ 0.10		$ 0.10
Share Redemption Trigger Price | $ / shares		$ 10.00		10.00
Class of warrants redemption notice period		30 days
Share Price Less Than Dollar Eighteen And Greater Than Or Equals To Ten Point Zero Zero | Minimum [Member] | Class A Common Stock [Member] | Public Warrants
Class Of Stock [Line Items]
Exercise price | $ / shares		$ 18.00		18.00
Class of warrants or rights redemption price per warrant | $ / shares		18.00		18.00
Share Price Equals Or Exceeds Dollar Eighteen | Class A Common Stock [Member] | Public Warrants
Class Of Stock [Line Items]
Exercise price | $ / shares		$ 0.01		0.01
Class of Warrant or Right Redemption Threshold Consecutive Trading Days		20 days
Class of Warrant or Right Redemption Threshold Trading Days		30 days
Share Redemption Trigger Price | $ / shares		$ 18.00		$ 18.00
Class of warrants redemption notice period		30 days