Restructuring (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Apr. 30, 2015		Apr. 30, 2014 Facility Position	Jan. 31, 2015
Restructuring Reserve [Roll Forward]
Additions	$ 0		2.3
Fiscal 2014 Plan
Restructuring Cost and Reserve [Line Items]
Number of positions eliminated (position)			85
Number of facilities consolidated (facilities)			4
Restructuring Reserve [Roll Forward]
Beginning Balance	1.4
Additions	0
Payments	(0.1)
Adjustments	0.1	[1]
Ending Balance	1.4
Current portion	0.8	[2]		0.6	[2]
Non-current portion	0.6	[2]		0.8	[2]
Total Restructuring Reserve	1.4
Fiscal 2014 Plan | Employee termination costs
Restructuring Reserve [Roll Forward]
Beginning Balance	0
Additions	0
Payments	0
Adjustments	0	[1]
Ending Balance	0
Total Restructuring Reserve	0
Fiscal 2014 Plan | Lease termination and asset costs
Restructuring Reserve [Roll Forward]
Beginning Balance	1.4
Additions	0
Payments	(0.1)
Adjustments	0.1	[1]
Ending Balance	1.4
Total Restructuring Reserve	1.4
Fiscal 2014 Plan | Minimum
Restructuring Cost and Reserve [Line Items]
Expected cost			15.0

[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.