Segments Concerning the Operations Of Reportable Segments (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jul. 31, 2012	Jul. 31, 2011	Jul. 31, 2012		Jul. 31, 2011
Segment Reporting Information [Line Items]
Net Income (Loss) Attributable to Parent	$ 64.6	$ 71.2	$ 143.5		$ 140.5
Revenue, Net	568.7	546.3	1,157.3		1,074.6
Gross Profit	508.9	488.9	1,038.7		962.6
Platform Solutions and Emerging Business [Member]
Segment Reporting Information [Line Items]
Revenue, Net	217.6	198.5	446.6		409.0
Gross Profit	204.3	187.2	420.1		385.8
Architecture, Engineering and Construction [Member]
Segment Reporting Information [Line Items]
Revenue, Net	161.0	157.9	324.4		299.3
Gross Profit	146.4	143.3	295.3		271.3
Manufacturing [Member]
Segment Reporting Information [Line Items]
Revenue, Net	141.3	135.8	287.0		259.0
Gross Profit	130.0	124.4	264.4		237.6
Media and Entertainment [Member]
Segment Reporting Information [Line Items]
Revenue, Net	48.8	54.1	99.3		107.3
Gross Profit	39.0	43.5	80.8		86.4
Unallocated Amount to Segment [Member]
Segment Reporting Information [Line Items]
Gross Profit	$ (10.8)	$ (9.5)	$ (21.9)	[1]	$ (18.5)	[1]

[1] Unallocated amounts primarily relate to corporate expenses and other costs and expenses that are managed outside the reportable segments, including stock-based compensation expense.