Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Property, Plant and Equipment Estimated Useful Lives (Detail)

v3.19.1
Summary of Significant Accounting Policies - Property, Plant and Equipment Estimated Useful Lives (Detail)
 12 Months Ended
Mar. 31, 2019
Minimum [Member] | Buildings  
Property, Plant and Equipment [Line Items]  
Property, plant and equipment useful life 10 years
Minimum [Member] | Building Improvements [Member]  
Property, Plant and Equipment [Line Items]  
Property, plant and equipment useful life 3 years
Minimum [Member] | Leasehold Improvements [Member]  
Property, Plant and Equipment [Line Items]  
Property, plant and equipment useful life 5 years
Minimum [Member] | Machinery and Equipment  
Property, Plant and Equipment [Line Items]  
Property, plant and equipment useful life 1 year
Maximum [Member] | Buildings  
Property, Plant and Equipment [Line Items]  
Property, plant and equipment useful life 50 years
Maximum [Member] | Building Improvements [Member]  
Property, Plant and Equipment [Line Items]  
Property, plant and equipment useful life 25 years
Maximum [Member] | Leasehold Improvements [Member]  
Property, Plant and Equipment [Line Items]  
Property, plant and equipment useful life 40 years
Maximum [Member] | Machinery and Equipment  
Property, Plant and Equipment [Line Items]  
Property, plant and equipment useful life 30 years