Retirement Benefit Plans (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jan. 31, 2012	Jan. 31, 2011	Jan. 31, 2010
Defined Contribution Plan - Savings
Pension and Other Postretirement Benefits Disclosure [Line Items]
Defined Contribution Plan, Maximum Annual Contribution Per Employee, Percent	50.00%
Defined Contribution Plan, Cost Recognized	$ 7.3	$ 6.7	$ 7.1
Foreign Pension Plans, Defined Benefit
Pension and Other Postretirement Benefits Disclosure [Line Items]
Net Liability related to the funded status of defined benefit pension plans	18.0	18.2
Defined Benefit pension Plans, projected benefit obligation	52.8	47.3
Defined Benefit Plan, Fair Value of Plan Assets	34.8	29.1
Company's Contributioin To Plan	4.2	3.5	3.4
Defined benefit pension plans, estimated future benefit payments from fiscal 2013 through 2017	10.2
Defined benefit pension plans, estimated future benefit payments from fiscal 2018 through 2022	7.9
Unfunded Defined Benefit Plan
Pension and Other Postretirement Benefits Disclosure [Line Items]
Unrealized changes in the unfunded portion of defined benefit plans	8.2	9.8
Foreign Pension Plans Defined Contribution
Pension and Other Postretirement Benefits Disclosure [Line Items]
Company's Contributioin To Plan	$ 20.4	$ 13.6	$ 13.4