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Acquisitions Acquisitions (Tables)
 6 Months Ended
Jul. 31, 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 and technology acquisitions completed during the six months ended July 31, 2014:

 
Shotgun
 
Within Technologies
 
Delcam
 
Other
Developed technologies
$
5.4

 
$
4.6

 
$
28.9

 
$
25.4

Customer relationships and other non-current intangible assets
7.5

 
3.6

 
39.7

 
7.3

Trade name
1.6

 
1.2

 
16.5

 
4.5

Goodwill
43.2

 
80.6

 
192.8

 
117.5

Deferred revenue (current and non-current)
(0.7
)
 
—

 
(10.4
)
 
(0.2
)
Deferred tax (liability)
(2.6
)
 
(1.7
)
 
(15.3
)
 
(2.1
)
Net tangible assets (liabilities)
0.1

 
(0.3
)
 
32.4

 
(0.9
)
Total
$
54.5


$
88.0

 
$
284.6

 
$
151.5