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Employee Benefit Plans (Tables)
 2 Months Ended
Dec. 31, 2016
General Discussion of Pension and Other Postretirement Benefits [Abstract]  
Components of Net Periodic Benefit Cost
The following table includes the components of net periodic benefit cost components for the two months ended December 31, 2016 and 2015.
 
 
Qualified Pension
Nonqualified Pension
Other Benefits
(in millions)
 
2016
 
2015
 
2016
 
2015
 
2016
 
2015
Service cost
 
$
2.0

 
$
1.8

 
$
—

 
$
—

 
$
0.2

 
$
0.2

Interest cost
 
2.1

 
1.6

 
—

 
—

 
0.2

 
0.2

Expected return on plan assets
 
(3.8
)
 
(4.0
)
 
—

 
—

 
(0.3
)
 
(0.3
)
Amortization of prior service (credit) cost
 
(0.4
)
 
(0.3
)
 
—

 
0.1

 
—

 
(0.1
)
Amortization of net loss
 
1.9

 
1.4

 
—

 
—

 
0.1

 
0.1

Settlement loss recognized
 
2.5

(1) 
—

 
—

 
—

 
—

 
—

Other
 
0.1

 
—

 
—

 
—

 
—

 
—

Net periodic benefit cost
 
$
4.4

 
$
0.5

 
$
—

 
$
0.1

 
$
0.2

 
$
0.1

 
 
 
 
 
 
 
 
 
 
 
 
 
(1) Settlement loss is a result of lump sum distributions related to severance activities exceeding periodic service and interest costs in the two months ended December 31, 2016. This settlement loss is included in costs to achieve expenses in Note 2.
Schedule of Future Contributions to Defined Benefit Plans
We anticipate that we will contribute the following amounts to our plans during the twelve month period ending December 31, 2017.
(in millions)
 
Qualified pension plan
$
11.0

Nonqualified pension plans
0.5

OPEB plan
2.2