Net (Loss) Income Per Share - Schedule of Basic and Diluted Net Income (loss) Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Earnings Per Share [Abstract]
Net (loss) income attributable to Vir	$ (163,413)	$ 175,312	$ (499,088)	$ 617,440
Weighted-average shares outstanding, basic (in shares)	134,289,620	132,729,530	133,969,878	132,422,028
Weighted-average effect of dilutive securities:
Options to purchase common stock (in shares)	0	2,144,302	0	2,227,493
Restricted shares subject to future vesting (in shares)	0	75,759	0	55,080
Shares to purchase under Employee Stock Purchase Plan (in shares)	0	13,726	0	7,176
Weighted-average shares outstanding, diluted (in shares)	134,289,620	134,963,317	133,969,878	134,711,777
Net (loss) income per share, basic (in USD per share)	$ (1.22)	$ 1.32	$ (3.73)	$ 4.66
Net (loss) income per share, diluted (in USD per share)	$ (1.22)	$ 1.30	$ (3.73)	$ 4.58