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Acquisitions Acquisitions (Tables)
 3 Months Ended
Apr. 30, 2014
Business Combinations [Abstract]  
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed
The following table summarizes the fair value of the assets acquired and liabilities assumed by major class for the business combinations completed during the three months ended April 30, 2014:
 
 
Delcam
 
Other
Developed technologies
 
$
28.9

 
$
9.8

Customer relationships and other non-current intangible assets
 
39.7

 
5.5

Trade name
 
16.5

 
1.9

Goodwill
 
196.2

 
50.3

Deferred revenue (current and non-current)
 
(10.4
)
 
—

Deferred tax (liability)
 
(15.3
)
 
(2.1
)
Net tangible assets (liabilities)
 
29.0

 
(1.2
)
Total
 
$
284.6

 
$
64.2