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Employee Benefit Plans (Tables)
 3 Months Ended
Feb. 28, 2019
Retirement Benefits [Abstract]  
Components of Net Periodic Benefit Costs
Net periodic benefit cost (income) consisted of the following for the three month periods ending February 28, 2019 and 2018:
 
Pension
Plans
 
Health Care
Plans
 
(Dollars in millions)
Three months ended February 28, 2019 and 2018
2019
 
2018
 
2019
 
2018
Service costs
$
.7

 
$
.6

 
$
—

 
$
—

Interest costs
2.5

 
2.3

 
.1

 
—

Expected return on plan assets
(3.9
)
 
(3.9
)
 
—

 
—

Amortization of net actuarial (gain) loss
1.1

 
1.3

 
(.3
)
 
(.2
)
Net periodic cost (benefit)
$
.4

 
$
.3

 
$
(.2
)
 
$
(.2
)