Annual report pursuant to Section 13 and 15(d)

Supplemental Balance Sheets and Statements of Operations Detail Supplemental Balance Sheets and Statements of Operations - Property, Plant and Equipment Useful Life (Details)

v3.20.1
Supplemental Balance Sheets and Statements of Operations Detail Supplemental Balance Sheets and Statements of Operations - Property, Plant and Equipment Useful Life (Details)
12 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Land and land improvements    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Useful Life 20 years 20 years
Buildings | Minimum    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Useful Life 20 years 20 years
Buildings | Maximum [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Useful Life 40 years 40 years
Machinery and equipment    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Useful Life 10 years 10 years
Furniture and fixtures | Minimum    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Useful Life 4 years 4 years
Furniture and fixtures | Maximum [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Useful Life 10 years 10 years