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Employee Benefit Plans (Tables)
 6 Months Ended
Jan. 31, 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
January 31,
 
Six Months Ended
January 31,
 
2018

 
2017

 
2018

 
2017

Net periodic benefit costs:
 

 
 

 
 

 
 

Service cost
$
2.1

 
$
2.0

 
$
4.1

 
$
4.1

Interest cost
3.7

 
3.4

 
7.4

 
6.7

Expected return on assets
(6.6
)
 
(6.6
)
 
(13.1
)
 
(13.2
)
Prior service cost amortization
0.2

 
0.2

 
0.3

 
0.4

Actuarial loss amortization
1.1

 
1.8

 
2.3

 
3.6

Net periodic benefit costs
$
0.5

 
$
0.8

 
$
1.0

 
$
1.6