Document and Entity Information - shares	6 Months Ended
	Sep. 30, 2023	Nov. 09, 2023
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2023
Current Fiscal Year End Date	--03-31
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q2
Document Transition Report	false
Entity File Number	001-40782
Entity Registrant Name	ROIVANT SCIENCES LTD.
Entity Central Index Key	0001635088
Entity Incorporation, State or Country Code	D0
Entity Tax Identification Number	98-1173944
Entity Address, Address Line One	7th Floor
Entity Address, Address Line Two	50 Broadway
Entity Address, City or Town	London
Entity Address, Country	GB
Entity Address, Postal Zip Code	SW1H 0DB
Country Region	44
City Area Code	207
Local Phone Number	400 3347
Title of 12(b) Security	Common Shares, $0.0000000341740141 per share
Trading Symbol	ROIV
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	true
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		803,921,356