Segments Concerning the Operations Of Reportable Segments (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended
	Oct. 31, 2013		Oct. 31, 2012		Oct. 31, 2013		Oct. 31, 2012
Segment Reporting Information [Line Items]
Net Income (Loss) Attributable to Parent	$ 57.6		$ 29.4		$ 174.9		$ 172.9
Revenue, Net	555.2		548.0		1,687.3		1,705.3
Gross Profit	488.1		490.1		1,484.9		1,528.8
Platform Solutions and Emerging Business [Member]
Segment Reporting Information [Line Items]
Revenue, Net	183.4	[1]	203.2	[1]	593.4	[1]	646.0	[1]
Gross Profit	165.9	[1]	189.8	[1]	540.7	[1]	606.2	[1]
Architecture, Engineering and Construction [Member]
Segment Reporting Information [Line Items]
Revenue, Net	185.9	[1]	164.6	[1]	535.1	[1]	492.9	[1]
Gross Profit	168.9	[1]	151.0	[1]	485.0	[1]	450.1	[1]
Manufacturing [Member]
Segment Reporting Information [Line Items]
Revenue, Net	142.0		131.8		425.1		418.8
Gross Profit	130.1		122.3		389.9		386.7
Media and Entertainment [Member]
Segment Reporting Information [Line Items]
Revenue, Net	43.9		48.4		133.7		147.6
Gross Profit	35.4		38.2		106.2		118.9
Unallocated Amount to Segment [Member]
Segment Reporting Information [Line Items]
Gross Profit	$ (12.2)	[2]	$ (11.2)	[2]	$ (36.9)	[2]	$ (33.1)	[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.