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Goodwill (Tables)
 3 Months Ended
Apr. 30, 2015
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Goodwill
The change in the carrying amount of goodwill by reporting unit during the three months ended April 30, 2015 is as follows:
 
 
Platform
Solutions and
Emerging
Business
 
Architecture,
Engineering
and
Construction
 
Manufacturing
 
Media and
Entertainment
 
Delcam
 
Total
Balances as of January 31, 2015
 
 
 
 
 
 
 
 
 
 
 
Goodwill
$
327.5

 
$
427.0

 
$
422.7

 
$
245.2

 
$
183.0

 
$
1,605.4

Accumulated impairment losses


 


 


 
(149.2
)
 
—

 
(149.2
)
 
327.5

 
427.0

 
422.7

 
96.0

 
183.0

 
1,456.2

Addition arising from other acquisitions
7.2

 
3.4

 
—

 
10.4

 
—

 
21.0

Effect of foreign currency translation, purchase accounting adjustments, and other
1.9

 
(0.4
)
 
(0.3
)
 
(0.1
)
 
(2.2
)
 
(1.1
)
Balance as of April 30, 2015
 
 
 
 
 
 
 
 
 
 
 
Goodwill
336.6

 
430.0


422.4


255.5


180.8

 
1,625.3

Accumulated impairment losses


 


 


 
(149.2
)
 
—

 
(149.2
)
 
$
336.6

 
$
430.0

 
$
422.4

 
$
106.3

 
$
180.8

 
$
1,476.1