Document And Entity Information - shares
9 Months Ended
Dec. 31, 2017
Feb. 02, 2018
Document And Entity Information [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Dec. 31, 2017  
Document Fiscal Year Focus 2018  
Document Fiscal Period Focus Q3  
Entity Registrant Name UNIVERSAL CORP /VA/  
Entity Central Index Key 0000102037  
Current Fiscal Year End Date --03-31  
Entity Filer Category Large Accelerated Filer  
Entity Common Stock, Shares Outstanding   25,045,631