POST RETIREMENT BENEFIT PLANS
 6 Months Ended
Apr. 30, 2019
Postemployment Benefits [Abstract]  
POST RETIREMENT BENEFIT PLANS
POST RETIREMENT BENEFIT PLANS
The components of net periodic pension cost include the following:
 
Three Months Ended
April 30,
 
Six Months Ended
April 30,
(in millions)
2019
 
2018
 
2019
 
2018
Service cost
$
3.8

 
$
3.3

 
$
6.3

 
$
6.6

Interest cost
8.7

 
4.6

 
13.9

 
9.2

Expected return on plan assets
(6.2
)
 
(6.1
)
 
(12.4
)
 
(12.2
)
Amortization of prior service (benefit) cost
(3.0
)
 
3.6

 
(1.2
)
 
7.2

Net periodic pension cost
$
3.3

 
$
5.4

 
$
6.6

 
$
10.8


Contributions, including benefits paid directly by the Company, to the pension plans were $11.8 million and $13.5 million, in the six months ended April 30, 2019 and 2018, respectively.
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)
2019
 
2018
 
2019
 
2018
Interest cost
$
0.1

 
$
0.1

 
$
0.2

 
$
0.2

Amortization of prior service benefit
(0.4
)
 
(0.4
)
 
(0.8
)
 
(0.8
)
Net periodic post-retirement benefit
$
(0.3
)
 
$
(0.3
)
 
$
(0.6
)
 
$
(0.6
)

The components of net periodic pension cost and net periodic post-retirement benefit, other than the service cost components, are included in the line item "Other expense, net" in the interim condensed consolidated statements of income.