v3.26.3
Cover - shares
6 Months Ended
Sep. 30, 2026
Nov. 03, 2026
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Sep. 30, 2026  
Document Transition Report false  
Entity File Number 001-40782  
Entity Registrant Name ROIVANT SCIENCES LTD.  
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, Postal Zip Code SW1H 0DB  
Entity Address, Country GB  
Country Region 44  
City Area Code 207  
Local Phone Number 400 3347  
Title of 12(b) Security Common Shares, $0.0000000341740141 per share  
Entity Trading Symbol ROIV  
Security Exchange Name NASDAQ  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   724,561,460
Entity Central Index Key 0001635088  
Current Fiscal Year End Date --03-31  
Amendment Flag false  
Document Fiscal Year Focus 2026  
Document Fiscal Period Focus Q2