Restructuring Activities (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Oct. 31, 2011		Jan. 31, 2011
Restructuring Cost and Reserve [Line Items]
Beginning Balance	$ 8.6
Current portion	1.5	[1]	4.8	[1]
Additions
Non-current portion	1.5	[1]	3.8	[1]
Payments	(3.8)
Total	3.0
Adjustments	(1.8)	[2]
Ending Balance	3.0
Fiscal 2011 Plan | Employee Termination Costs
Restructuring Cost and Reserve [Line Items]
Beginning Balance	1.5
Additions
Payments	(1.5)
Fiscal 2010 Plan | Lease Termination and Asset Costs
Restructuring Cost and Reserve [Line Items]
Beginning Balance	1.7
Additions
Payments	(0.9)
Total	0.6
Adjustments	(0.2)	[2]
Ending Balance	0.6
Fiscal 2009 Plan | Lease Termination and Asset Costs
Restructuring Cost and Reserve [Line Items]
Beginning Balance	2.8
Additions
Payments	(0.7)
Total	0.8
Adjustments	(1.3)	[2]
Ending Balance	0.8
Other | Lease Termination and Asset Costs
Restructuring Cost and Reserve [Line Items]
Beginning Balance	2.6
Additions
Payments	(0.7)
Total	1.6
Adjustments	(0.3)	[2]
Ending Balance	$ 1.6

[1] 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.

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