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Acquisitions Acquisitions (Tables)
3 Months Ended
Apr. 30, 2013
Acquistions [Abstract]  
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]
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 three months ended April 30, 2013:
Developed technologies
 
$
4.3

Customer relationships
 
2.0

Trade name
 
0.5

Goodwill
 
27.3

Deferred tax asset
 
0.7

Net tangible assets
 
0.2

Total
 
$
35.0