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POST RETIREMENT BENEFIT PLANS
 9 Months Ended
Jul. 31, 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
July 31,
 
Nine Months Ended
July 31,
(in millions)
2019
 
2018
 
2019
 
2018
Service cost
$
3.8

 
$
3.1

 
$
10.1

 
$
9.7

Interest cost
8.7

 
4.7

 
22.6

 
13.9

Expected return on plan assets
(11.0
)
 
(6.4
)
 
(28.2
)
 
(18.6
)
Amortization of prior service (benefit) cost
1.8

 
3.4

 
5.4

 
10.6

Net periodic pension cost
$
3.3

 
$
4.8

 
$
9.9

 
$
15.6


Contributions, including benefits paid directly by the Company, to the pension plans were $19.7 million and $85.4 million, in the nine months ended July 31, 2019 and 2018, respectively.
The components of net periodic post-retirement benefit include the following:
 
Three Months Ended
July 31,
 
Nine Months Ended
July 31,
(in millions)
2019
 
2018
 
2019
 
2018
Interest cost
$
0.1

 
$
0.1

 
$
0.3

 
$
0.3

Amortization of prior service benefit
(0.4
)
 
(0.4
)
 
(1.2
)
 
(1.2
)
Net periodic post-retirement benefit
$
(0.3
)
 
$
(0.3
)
 
$
(0.9
)
 
$
(0.9
)

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.