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Warranty (Tables)
 6 Months Ended
Jan. 31, 2017
Standard Product Warranty Disclosure [Abstract]  
Reconciliation Of Warranty Reserves
Following is a reconciliation of warranty reserves for the six months ended January 31, 2017 and 2016 (in millions):
 
Six Months Ended
January 31,
 
2017
 
2016
Beginning balance
$
11.9

 
$
8.6

Accruals for warranties issued during the reporting period
1.5

 
2.6

Accruals related to pre-existing warranties (including changes in estimates)
3.8

 
2.7

Less settlements made during the period
(2.5
)
 
(1.7
)
Ending balance
$
14.7

 
$
12.2