Restructuring Reserve Restructuring Activities (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended										12 Months Ended
	Jan. 31, 2013		Oct. 31, 2012	Jul. 31, 2012	Apr. 30, 2012	Jan. 31, 2012		Oct. 31, 2011	Jul. 31, 2011	Apr. 30, 2011	Jan. 31, 2013		Jan. 31, 2012		Jan. 31, 2011
Additions	$ 7.2		$ 36.7	$ 0	$ 0	$ 0		$ 0	$ (1.3)	$ 0	$ 43.9		$ (1.3)		$ 10.8
Fiscal 2013 Plan [Member]
Beginning Balance					0						0
Additions											44.3
Payments											(36.6)
Adjustments											(0.4)	[1]
Ending Balance	7.3										7.3
Current portion	5.8	[2]				0	[2]				5.8	[2]	0	[2]
Non-current portion	1.5	[2]				0	[2]				1.5	[2]	0	[2]
Yearly Total All Plans [Member]
Beginning Balance										8.6			8.6
Additions													0
Payments													(4.3)
Adjustments													(1.9)	[1]
Ending Balance						2.4							2.4
Current portion						1.1	[2]						1.1	[2]	4.8	[2]
Non-current portion						1.3	[2]						1.3	[2]	3.8	[2]
Employee Severance | Fiscal 2013 Plan [Member]
Beginning Balance					0						0
Additions											41.0
Payments											(36.1)
Adjustments											(0.4)	[1]
Ending Balance	4.5										4.5
Employee Severance | RestructuringFiscal2011Plan
Beginning Balance										1.5			1.5
Additions													0
Payments													(1.5)
Adjustments													0	[1]
Ending Balance						0							0
Employee Severance | RestructuringFiscal2010Plan
Beginning Balance										0			0
Additions													0
Payments													0
Adjustments													0	[1]
Ending Balance						0							0
Employee Severance | RestructuringFiscal2009Plan
Beginning Balance										0			0
Additions													0
Payments													0
Adjustments													0	[1]
Ending Balance						0							0
Employee Severance | Otherrestructuring [Member]
Beginning Balance										0			0
Additions													0
Payments													0
Adjustments													0	[1]
Ending Balance						0							0
Lease Termination | Fiscal 2013 Plan [Member]
Beginning Balance					0						0
Additions											3.3
Payments											(0.5)
Adjustments											0	[1]
Ending Balance	2.8										2.8
Lease Termination | RestructuringFiscal2010Plan
Beginning Balance										1.7			1.7
Additions													0
Payments													(1.1)
Adjustments													(0.3)	[1]
Ending Balance						0.3							0.3
Lease Termination | RestructuringFiscal2009Plan
Beginning Balance										2.8			2.8
Additions													0
Payments													(0.9)
Adjustments													(1.3)	[1]
Ending Balance						0.6							0.6
Lease Termination | Otherrestructuring [Member]
Beginning Balance										2.6			2.6
Additions													0
Payments													(0.8)
Adjustments													(0.3)	[1]
Ending Balance						$ 1.5							$ 1.5

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

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