Pensions and Postretirement Benefits (Tables)
 9 Months Ended
Aug. 31, 2016
Defined Benefit Plan Disclosure [Line Items]  
Schedule of Defined Benefit Plans Disclosures [Table Text Block]
Our net periodic pension expense for the three and nine months ended August 31, 2016 and 2015 consisted of the following (in millions): 
 
Three months ended August 31,
 
Nine months ended August 31,
 
2016
 
2015
 
2016
 
2015
Service costs incurred
$
0.4

 
$
0.6

 
$
0.9

 
$
1.5

Interest costs on projected benefit obligation
2.2

 
2.1

 
6.4

 
6.3

Expected return on plan assets
(2.1
)
 
(2.2
)
 
(6.4
)
 
(6.6
)
Net periodic pension expense
$
0.5

 
$
0.5

 
$
0.9

 
$
1.2

Our net periodic postretirement expense for the three and nine months ended August 31, 2016 and 2015 consisted of the following (in millions):
 
Three months ended August 31,
 
Nine months ended August 31,
 
2016
 
2015
 
2016
 
2015
Service costs incurred
$
—

 
$
—

 
$
—

 
$
—

Interest costs
0.1

 
0.1

 
0.3

 
0.3

Net periodic postretirement expense
$
0.1

 
$
0.1

 
$
0.3

 
$
0.3