Consolidated Statements of Comprehensive loss - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Income Statement [Abstract]
Net loss	$ (437,987)	$ (521,960)	$ (615,117)
Other comprehensive (loss) income:
Unrealized (loss) gain on investments	(314)	503	9,310
Pension actuarial loss	(26)	(1,405)	(1,003)
Total other comprehensive (loss) income	(340)	(902)	8,307
Comprehensive loss	(438,327)	(522,862)	(606,810)
Comprehensive loss attributable to noncontrolling interest	0	0	(56)
Comprehensive loss attributable to Vir Bio	$ (438,327)	$ (522,862)	$ (606,754)