XML 43 R31.htm IDEA: XBRL DOCUMENT v3.8.0.1
Post Retirement Benefit Plans (Tables)
 6 Months Ended
Apr. 30, 2018
Postemployment Benefits [Abstract]  
Components of Net Periodic Pension Cost
The components of net periodic pension cost include the following:
 
Three Months Ended
April 30,
 
Six Months Ended
April 30,
(in millions)
2018
 
2017
 
2018
 
2017
Service cost
$
3.3

 
$
3.3

 
$
6.6

 
$
6.6

Interest cost
4.6

 
4.6

 
9.2

 
9.2

Expected return on plan assets
(6.1
)
 
(7.1
)
 
(12.2
)
 
(14.2
)
Amortization of prior service cost and net actuarial gain
3.6

 
2.8

 
7.2

 
5.6

Net periodic pension costs
$
5.4

 
$
3.6

 
$
10.8

 
$
7.2
Components of Net Periodic Cost for Postretirement Benefits
The components of net periodic cost for post-retirement benefits include the following:
 
Three Months Ended
April 30,
 
Six Months Ended
April 30,
(in millions)
2018
 
2017
 
2018
 
2017
Interest cost
$
0.1

 
$
0.1

 
$
0.2

 
$
0.2

Amortization of prior service cost and net actuarial gain
(0.4
)
 
(0.4
)
 
(0.8
)
 
(0.7
)
Net periodic benefit for post-retirement benefits
$
(0.3
)
 
$
(0.3
)
 
$
(0.6
)
 
$
(0.5
)