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Pension and Other Postretirement Benefits (Tables)
 3 Months Ended
Mar. 31, 2015
Pension and Other Postretirement Benefits  
Schedule of components of net periodic benefit cost

 

 

 

 

Pension Benefits

 

Postretirement Benefits
Other than Pensions

 

 

 

Three Months Ended March 31,

 

 

 

2015

 

2014

 

2015

 

2014

 

Service cost

 

$
1.5

 

$
1.3

 

$
0.3

 

$
0.4

 

Interest cost

 
3.4

 
3.8

 
0.4

 
0.5

 

Expected return on plan assets (a)

 
(4.6

)
(4.2

)

—

 

—

 

Recognized net actuarial loss

 
1.7

 
1.1

 

—

 

—

 

Amortization of prior service cost

 
0.1

 
0.1

 

—

 

—

 

Net periodic benefit cost

 

$
2.1

 

$
2.1

 

$
0.7

 

$
0.9

 

 

(a)

The expected return on plan assets is determined by multiplying the fair value of plan assets at the prior year-end (adjusted for estimated current year cash benefit payments and contributions) by the expected long-term rate of return.