Summary of Significant Accounting Policies - Property, Plant & Equipment (Details)	12 Months Ended
	Jan. 31, 2020
Building
Useful Lives [Line Items]
Useful life (years)	39 years
Minimum | Building Improvements
Useful Lives [Line Items]
Useful life (years)	8 years
Minimum | Leasehold Improvements
Useful Lives [Line Items]
Useful life (years)	8 years
Minimum | Machinery and Equipment
Useful Lives [Line Items]
Useful life (years)	5 years
Minimum | Office Equipment
Useful Lives [Line Items]
Useful life (years)	3 years
Minimum | Software and Software Development Costs
Useful Lives [Line Items]
Useful life (years)	5 years
Minimum | Furniture and Fixtures
Useful Lives [Line Items]
Useful life (years)	3 years
Maximum | Building Improvements
Useful Lives [Line Items]
Useful life (years)	10 years
Maximum | Leasehold Improvements
Useful Lives [Line Items]
Useful life (years)	10 years
Maximum | Machinery and Equipment
Useful Lives [Line Items]
Useful life (years)	15 years
Maximum | Office Equipment
Useful Lives [Line Items]
Useful life (years)	8 years
Maximum | Software and Software Development Costs
Useful Lives [Line Items]
Useful life (years)	10 years
Maximum | Furniture and Fixtures
Useful Lives [Line Items]
Useful life (years)	10 years