Segments Concerning the Operations Of Reportable Segments (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Jul. 31, 2013		Jul. 31, 2012		Jul. 31, 2013		Jul. 31, 2012
Segment Reporting Information [Line Items]
Net Income (Loss) Attributable to Parent	$ 61.7		$ 64.6		$ 117.3		$ 143.5
Revenue, Net	561.7		568.7		1,132.1		1,157.3
Gross Profit	493.9		508.9		996.8		1,038.7
Platform Solutions and Emerging Business [Member]
Segment Reporting Information [Line Items]
Revenue, Net	197.3	[1]	216.1	[1]	410.0	[1]	442.8	[1]
Gross Profit	179.6	[1]	202.8	[1]	374.8	[1]	416.4	[1]
Architecture, Engineering and Construction [Member]
Segment Reporting Information [Line Items]
Revenue, Net	177.1	[1]	162.6	[1]	349.2	[1]	328.3	[1]
Gross Profit	160.6	[1]	148.0	[1]	316.1	[1]	299.1	[1]
Manufacturing [Member]
Segment Reporting Information [Line Items]
Revenue, Net	144.0		141.3		283.1		287.0
Gross Profit	132.3		130.0		259.8		264.4
Media and Entertainment [Member]
Segment Reporting Information [Line Items]
Revenue, Net	43.3		48.7		89.8		99.2
Gross Profit	33.8		38.9		70.8		80.7
Unallocated Amount to Segment [Member]
Segment Reporting Information [Line Items]
Gross Profit	$ (12.4)	[2]	$ (10.8)	[2]	$ (24.7)	[2]	$ (21.9)	[2]

[1] The fiscal 2013 quarterly segment revenue amounts have been updated to conform with the current period's presentation.

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