Segments Information Regarding Operations by Geographic Area (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Apr. 30, 2013	Apr. 30, 2012
Segment Reporting Information [Line Items]
Net Income (Loss) Attributable to Parent	$ 55.6	$ 78.9
Revenue, Net	570.4	588.6
Total Americas [Member]
Segment Reporting Information [Line Items]
Revenue, Net	202.2	207.6
Europe Middle East And Africa [Member]
Segment Reporting Information [Line Items]
Revenue, Net	216.2	224.4
Total Asia [Member]
Segment Reporting Information [Line Items]
Revenue, Net	152.0	156.6
UNITED STATES [Member] | Total Americas [Member]
Segment Reporting Information [Line Items]
Revenue, Net	166.4	166.0
Other Americas [Member] | Total Americas [Member]
Segment Reporting Information [Line Items]
Revenue, Net	35.8	41.6
JAPAN [Member] | Total Asia [Member]
Segment Reporting Information [Line Items]
Revenue, Net	76.8	76.3
Other Asia Pacific [Member] | Total Asia [Member]
Segment Reporting Information [Line Items]
Revenue, Net	$ 75.2	$ 80.3