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Employee Benefit Plans (Tables)
 9 Months Ended
Apr. 30, 2018
Retirement Benefits, Description [Abstract]  
Components Of Net Periodic Pension Costs
Net periodic benefit costs for the Company’s pension plans include the following components (in millions):
 
Three Months Ended
April 30,
 
Nine Months Ended
April 30,
 
2018

 
2017

 
2018

 
2017

Net periodic benefit costs:
 

 
 

 
 

 
 

Service cost
$
2.1

 
$
2.0

 
$
6.2

 
$
6.2

Interest cost
3.8

 
3.4

 
11.2

 
10.1

Expected return on assets
(6.6
)
 
(6.6
)
 
(19.7
)
 
(19.8
)
Prior service cost amortization
—

 
0.2

 
0.3

 
0.4

Actuarial loss amortization
1.2

 
1.8

 
3.5

 
5.4

Net periodic benefit costs
$
0.5

 
$
0.8

 
$
1.5

 
$
2.3