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Retirement Benefits
 9 Months Ended
Sep. 30, 2014
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]  
Retirement Benefits
Retirement Benefits
The components of net periodic (credit) benefit cost included in the consolidated statements of income for the three months ended September 30, 2014 and 2013 are as follows:
 
Pension Benefits
 
Other Benefits
 
2014
 
2013
 
2014
 
2013
Service cost
$
3.2

 
$
3.5

 
$
0.8

 
$
1.6

Interest cost
18.5

 
17.2

 
6.6

 
5.6

Expected return on assets
(34.4
)
 
(33.2
)
 
(5.8
)
 
(5.5
)
Recognized actuarial loss
5.3

 
6.1

 
2.3

 
2.8

Settlement loss
1.3

 
2.6

 
—

 
—

Amortization of prior service credit
(0.2
)
 
(0.2
)
 
(3.6
)
 
(3.3
)
Net periodic (credit) benefit cost
$
(6.3
)
 
$
(4.0
)
 
$
0.3

 
$
1.2

The components of net periodic (credit) benefit cost included in the consolidated statements of income for the nine months ended September 30, 2014 and 2013 are as follows:
 
Pension Benefits
 
Other Benefits
 
2014
 
2013
 
2014
 
2013
Service cost
$
9.7

 
$
10.8

 
$
2.4

 
$
5.0

Interest cost
55.5

 
50.6

 
19.7

 
16.8

Expected return on assets
(103.1
)
 
(99.8
)
 
(17.5
)
 
(16.5
)
Recognized actuarial loss
15.8

 
23.2

 
7.0

 
8.4

Settlement loss
3.8

 
9.7

 
—

 
—

Amortization of prior service credit
(0.6
)
 
(0.6
)
 
(10.8
)
 
(10.0
)
Net periodic (credit) benefit cost
$
(18.9
)
 
$
(6.1
)
 
$
0.8

 
$
3.7


For the year ending December 31, 2014, no material contributions are expected to be necessary to meet the Employee Retirement Income Security Act, or ERISA, required funding levels; however, we may elect to make discretionary contributions up to the maximum amount deductible for income tax purposes. No contributions were made to our retirement benefit plans during the nine months ended September 30, 2014. Contributions of $34.8 were made to our retirement benefit plans during the three and nine months ended September 30, 2013.