Restructuring (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		12 Months Ended		6 Months Ended
	Jul. 31, 2013	Jul. 31, 2012	Jul. 31, 2013	Jul. 31, 2012	Jul. 31, 2013 Fiscal 2013 Plan [Member]		Jul. 31, 2013 Fiscal 2013 Plan [Member]		Jul. 31, 2013 Fiscal 2013 Plan [Member]		Jul. 31, 2013 Fiscal 2013 Plan [Member] Employee Severance [Member]		Jul. 31, 2013 Fiscal 2013 Plan [Member] Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Number of Positions Eliminated (in number)							500
NumberOfFacilitiesThatWereConsolidated (in number)			8
Restructuring and Related Cost, Cost Incurred to Date					$ 1.7		$ 2.1		$ 46.0
Restructuring Reserve [Roll Forward]
Beginning Balance							7.3				4.5		2.8
Additions	1.7	0	2.1	0			2.0				0.5		1.5
Payments							(9.1)				(4.9)		(4.2)
Adjustments							0.1	[1]			(0.1)	[1]	0.2	[1]
Ending Balance					0.3		0.3		0.3		0		0.3
Current portion At January 31, 2012							5.8	[2]
Current portion At October 31, 2012					0.2	[2]	0.2	[2]	0.2	[2]
Non-current portion At January 31, 2012							1.5	[2]
Non-current portion At October 31, 2012					$ 0.1	[2]	$ 0.1	[2]	$ 0.1	[2]

[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.