Property and Equipment, Net (Property and Equipment) (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2017	Jan. 31, 2016
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 397.7	$ 369.8
Less accumulated depreciation	149.4	109.3
Property, Plant and Equipment, Net, Total	$ 248.3	260.5
Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, useful lives (years)	1 year
Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, useful lives (years)	50 years
Land, buildings and improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 40.9	35.5
Land, buildings and improvements | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, useful lives (years)	1 year
Land, buildings and improvements | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, useful lives (years)	50 years
Machinery
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 119.8	89.5
Machinery | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, useful lives (years)	2 years
Machinery | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, useful lives (years)	20 years
Computer Equipment and Software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 105.5	96.1
Computer Equipment and Software | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, useful lives (years)	3 years
Computer Equipment and Software | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, useful lives (years)	15 years
Furniture and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 131.5	$ 148.7
Furniture and equipment | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, useful lives (years)	3 years
Furniture and equipment | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, useful lives (years)	14 years