v3.7.0.1
Document and Entity Information - shares
3 Months Ended
Jun. 30, 2017
Aug. 08, 2017
Document and Entity Information    
Entity Registrant Name Myovant Sciences Ltd.  
Entity Central Index Key 0001679082  
Document Type 10-Q  
Document Period End Date Jun. 30, 2017  
Amendment Flag false  
Current Fiscal Year End Date --03-31  
Entity Current Reporting Status Yes  
Entity Filer Category Non-accelerated Filer  
Entity Common Stock, Shares Outstanding (in shares)   60,844,300
Document Fiscal Year Focus 2018  
Document Fiscal Period Focus Q1