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Employee Benefit Plans (Tables)
9 Months Ended
Aug. 31, 2019
Retirement Benefits [Abstract]  
Components of Net Periodic Benefit Costs
Net periodic benefit cost (income) consisted of the following for the three and nine month periods ending August 31, 2019 and 2018:
 
Pension
Plans
 
Health Care
Plans
 
(Dollars in millions)
Three months ended August 31, 2019 and 2018
2019
 
2018
 
2019
 
2018
Service costs
$
.8

 
$
.6

 
$

 
$

Interest costs
2.5

 
2.2

 
.1

 
.1

Expected return on plan assets
(4.0
)
 
(3.9
)
 

 

Amortization of net actuarial (gain) loss
1.1

 
1.4

 
(.4
)
 
(.2
)
Net periodic cost (benefit)
$
.4

 
$
.3

 
$
(.3
)
 
$
(.1
)
 
 
Pension
Plans
 
Health Care
Plans
 
(Dollars in millions)
Nine months ended August 31, 2019 and 2018
2019
 
2018
 
2019
 
2018
Service costs
$
2.2

 
$
1.9

 
$

 
$

Interest costs
7.6

 
6.7

 
.2

 
.2

Expected return on plan assets
(11.8
)
 
(11.7
)
 

 

Amortization of net actuarial (gain) loss
3.4

 
4.1

 
(1.0
)
 
(.7
)
Net periodic cost (benefit)
$
1.4

 
$
1.0

 
$
(.8
)
 
$
(.5
)