Goodwill Changes in the Carrying Amount of Goodwill (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Apr. 30, 2014	Feb. 06, 2014
Goodwill [Roll Forward]
Goodwill before accumulated impairment losses beginning balance	$ 1,159.1
Accumulated impairment losses beginning balance	(149.2)
Goodwill	1,009.9
Effect of foreign currency translation, purchase accounting and other	6.6
Goodwill before accumulated impairment losses ending balance	1,412.2
Accumulated impairment losses ending balance	(149.2)
Goodwill	1,263.0
Platform Solutions and Emerging Business
Goodwill [Roll Forward]
Goodwill before accumulated impairment losses beginning balance	142.3
Accumulated impairment losses beginning balance	0
Goodwill	142.3
Effect of foreign currency translation, purchase accounting and other	0.2
Goodwill before accumulated impairment losses ending balance	166.9
Accumulated impairment losses ending balance	0
Goodwill	166.9
Architecture, Engineering and Construction
Goodwill [Roll Forward]
Goodwill before accumulated impairment losses beginning balance	415.2
Accumulated impairment losses beginning balance	0
Goodwill	415.2
Effect of foreign currency translation, purchase accounting and other	1.6
Goodwill before accumulated impairment losses ending balance	427.4
Accumulated impairment losses ending balance	0
Goodwill	427.4
Manufacturing
Goodwill [Roll Forward]
Goodwill before accumulated impairment losses beginning balance	411.6
Accumulated impairment losses beginning balance	0
Goodwill	411.6
Effect of foreign currency translation, purchase accounting and other	5.0
Goodwill before accumulated impairment losses ending balance	612.8
Accumulated impairment losses ending balance	0
Goodwill	612.8
Media and Entertainment
Goodwill [Roll Forward]
Goodwill before accumulated impairment losses beginning balance	190.0
Accumulated impairment losses beginning balance	(149.2)
Goodwill	40.8
Effect of foreign currency translation, purchase accounting and other	(0.2)
Goodwill before accumulated impairment losses ending balance	205.1
Accumulated impairment losses ending balance	(149.2)
Goodwill	55.9
Delcam
Goodwill [Roll Forward]
Goodwill		196.2
Goodwill, acquired during period	196.2
Goodwill		196.2
Delcam | Platform Solutions and Emerging Business
Goodwill [Roll Forward]
Goodwill, acquired during period	0
Delcam | Architecture, Engineering and Construction
Goodwill [Roll Forward]
Goodwill, acquired during period	0
Delcam | Manufacturing
Goodwill [Roll Forward]
Goodwill, acquired during period	196.2
Delcam | Media and Entertainment
Goodwill [Roll Forward]
Goodwill, acquired during period	0
Other acquisitions
Goodwill [Roll Forward]
Goodwill, acquired during period	50.3
Goodwill	50.3
Other acquisitions | Platform Solutions and Emerging Business
Goodwill [Roll Forward]
Goodwill, acquired during period	24.4
Other acquisitions | Architecture, Engineering and Construction
Goodwill [Roll Forward]
Goodwill, acquired during period	10.6
Other acquisitions | Manufacturing
Goodwill [Roll Forward]
Goodwill, acquired during period	0
Other acquisitions | Media and Entertainment
Goodwill [Roll Forward]
Goodwill, acquired during period	$ 15.3