Benefit Plans (Tables)
 3 Months Ended
Mar. 31, 2015
Compensation and Retirement Disclosure [Abstract]  
Components of Net Periodic Benefit Cost
The following table sets forth the net periodic benefit cost for the Company’s defined benefit pension plans and other benefits for the three months ended March 31:
 
 
Pension Benefits
 
Other Benefits
 
 
2015
 
2014
 
2015
 
2014
Components of net periodic benefit cost
 
 
 
 
 
 
 
 
Service cost
 
$
0.9

 
$
0.7

 
$
—

 
$
—

Interest cost
 
5.9

 
5.7

 
0.1

 
0.2

Expected return on plan assets
 
(6.7
)
 
(6.4
)
 
—

 
—

Amortization of prior service benefit
 
—

 
—

 
—

 
(0.1
)
Recognized net actuarial loss
 
1.7

 
0.8

 
0.1

 
0.1

Net periodic pension benefit cost
 
$
1.8

 
$
0.8

 
$
0.2

 
$
0.2