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POST RETIREMENT BENEFIT PLANS (Tables)
 3 Months Ended
Jan. 31, 2019
Postemployment Benefits [Abstract]  
Components of Net Periodic Pension Cost
The components of net periodic pension cost include the following:
 
Three Months Ended
January 31,
(in millions)
2019
 
2018
Service cost
$
2.5

 
$
3.3

Interest cost
5.2

 
4.6

Expected return on plan assets
(6.2
)
 
(6.1
)
Amortization of prior service cost and net actuarial loss
1.8

 
3.6

Net periodic pension costs
$
3.3

 
$
5.4
Components of Net Periodic Cost for Postretirement Benefits
The components of net periodic cost for post-retirement benefits include the following:
 
Three Months Ended
January 31,
(in millions)
2019
 
2018
Interest cost
$
0.1

 
$
0.1

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