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Employee Benefits (Tables)
 6 Months Ended
Apr. 30, 2017
General Discussion of Pension and Other Postretirement Benefits [Abstract]  
Schedule of Components of Net Periodic Pension Costs
Our results of operations for the three and six months ended April 30, 2017 and 2016 reflect the following components of net periodic pension costs:
Periods Ended April 30,
Three Months
 
Six Months
(In millions)
2017
 
2016
 
2017
 
2016
Service cost
$
2.5

 
$
2.3

 
$
5.0

 
$
4.6

Interest cost
1.1

 
1.2

 
2.2

 
2.5

Expected return on plan assets
(1.8
)
 
(1.6
)
 
(3.6
)
 
(3.3
)
Recognized net actuarial loss
0.7

 
0.4

 
1.4

 
0.8

Net periodic pension cost
$
2.5

 
$
2.3

 
$
5.0

 
$
4.6