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Acquisitions (Tables)
 12 Months Ended
Jan. 31, 2015
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 each of the business combinations and technology acquisitions completed during the fiscal year ended January 31, 2014:
 
Graitec
 
Other
Developed technologies
$
15.9

 
$
15.9

Customer relationships
2.2

 
2.8

Trade name
1.7

 
1.8

Goodwill
73.4

 
67.0

Deferred tax (liability) asset
(6.2
)
 
0.7

Net tangible assets
—

 
1.5

Total
$
87.0

 
$
89.7

The following table summarizes the fair value of the assets acquired and liabilities assumed by major class for each of the business combinations and technology acquisitions completed during the fiscal year ended January 31, 2015:
 
Shotgun
 
Within
 
Delcam
 
Other
Developed technologies
$
5.4

 
$
4.6

 
$
28.9

 
$
39.0

Customer relationships and other non-current intangible assets
7.5

 
3.6

 
39.7

 
9.8

Trade name
1.6

 
1.2

 
16.5

 
6.3

Goodwill
43.2

 
80.6

 
190.4

 
180.6

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

 
(10.4
)
 
(0.4
)
Deferred tax liability
(2.6
)
 
(1.7
)
 
(13.2
)
 
(2.1
)
Net tangible assets (liabilities)
0.1

 
(0.3
)
 
32.7

 
1.3

 
$
54.5

 
$
88.0

 
$
284.6

 
$
234.5