Restructuring (Details) $ in Millions		3 Months Ended		6 Months Ended		12 Months Ended
		Jul. 31, 2015 USD ($)	Jul. 31, 2014 USD ($)	Jul. 31, 2015 USD ($)	Jul. 31, 2014 USD ($)	Jan. 31, 2014 USD ($) Facility Position	Jan. 31, 2015 USD ($)
Restructuring Reserve [Roll Forward]
Additions		$ 0.0	$ 0.8	$ 0.0	$ 3.1
Fiscal 2014 Plan
Restructuring Cost and Reserve [Line Items]
Number of positions eliminated (position) | Position						85
Number of facilities consolidated (facilities) | Facility						4
Expected cost						$ 15.0
Restructuring Reserve [Roll Forward]
Beginning Balance				1.4
Additions				0.0
Payments				(0.3)
Adjustments	[1]			0.2
Ending Balance		1.3		1.3
Current portion	[2]	0.8					$ 0.6
Non-current portion	[2]	0.5					0.8
Total Restructuring Reserve		1.3		1.4			1.4
Fiscal 2014 Plan | Employee termination costs
Restructuring Reserve [Roll Forward]
Beginning Balance				0.0
Additions				0.0
Payments				0.0
Adjustments	[1]			0.0
Ending Balance		0.0		0.0
Total Restructuring Reserve		0.0		0.0			0.0
Fiscal 2014 Plan | Lease termination and asset costs
Restructuring Reserve [Roll Forward]
Beginning Balance				1.4
Additions				0.0
Payments				(0.3)
Adjustments	[1]			0.2
Ending Balance		1.3		1.3
Total Restructuring Reserve		$ 1.3		$ 1.4			$ 1.4

[1] Adjustments include the impact of foreign currency translation.

[2] The current and non-current portions of the reserve are recorded in the Condensed Consolidated Balance Sheets under “Other accrued liabilities” and “Other liabilities,” respectively.