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Acquisitions (Tables)
 6 Months Ended
Jul. 31, 2018
Business Combinations [Abstract]  
Schedule of fair value of the assets acquired and liabilities assumed The following table summarizes the fair value of the assets acquired and liabilities assumed by major class for the Assemble business combination that was completed during the six months ended July 31, 2018:

 
 
July 31, 2018
Developed technologies
 
$
4.4

Customer relationships and other non-current intangible assets
 
12.0

Trade name
 
2.8

Goodwill
 
71.9

Deferred revenue (current and non-current)
 
(1.7
)
Net tangible assets
 
4.2

Total
 
$
93.6