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Employee Retirement Plans
 6 Months Ended
Jun. 30, 2014
Compensation and Retirement Disclosure [Abstract]  
Employee Retirement Plans
Employee Retirement Plans

The following table summarizes the components of net retirement cost for the Company:
 
Three Months Ended
June 30,
 
Six Months Ended
June 30,
 
2014
 
2013
 
2014
 
2013
 
(in millions)
Expense Components
 
 
 
 
 
 
 
Service cost
$
0.1

 
$
0.2

 
$
0.2

 
$
0.5

Interest
5.0

 
4.6

 
10.0

 
9.3

Expected return on plan assets
(7.7
)
 
(6.7
)
 
(15.4
)
 
(13.3
)
Amortization of actuarial loss
0.3

 
1.3

 
0.6

 
2.5

Defined benefit expense
(2.3
)
 
(0.6
)
 
(4.6
)
 
(1.0
)
Profit sharing
5.2

 
3.3

 
8.9

 
6.4

Net expense
$
2.9

 
$
2.7

 
$
4.3

 
$
5.4



Trinity contributed $3.5 million and $7.6 million to the Company's defined benefit pension plans for the three and six months ended June 30, 2014, respectively. Trinity contributed $4.5 million and $8.1 million to the Company's defined benefit pension plans for the three and six months ended June 30, 2013, respectively. Total contributions to the Company's defined benefit pension plans in 2014 are expected to be approximately $15.2 million.