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Commitments, guarantees and contingencies (Tables)
 12 Months Ended
Jul. 31, 2017
Commitments And Contingencies Disclosure [Abstract]  
Product Warranty Liability

The following table presents our accrued warranty liability for fiscal years 2017 and 2016:

 

 

 

As of

 

 

As of

 

 

 

July 31,

 

 

July 31,

 

(in millions)

 

2017

 

 

2016

 

Beginning balance

 

$

6.3

 

 

$

6.6

 

Provision

 

 

4.0

 

 

 

5.7

 

Warranty activity during the period

 

 

(5.0

)

 

 

(6.0

)

Ending balance

 

$

5.3

 

 

$

6.3