Pensions
 3 Months Ended
Mar. 31, 2015
Compensation and Retirement Disclosure [Abstract]  
Pensions
PENSIONS
The following table summarizes the components of net postretirement pension expense: 
 
U.S. Benefit Plan
 
Non-U.S. Benefit Plans
 
Three Months Ended 
 March 31,
 
Three Months Ended 
 March 31,
(in millions)
2015
 
2014
 
2015
 
2014
Service cost
$
—

 
$
—

 
$
0.1

 
$
0.1

Interest cost
1.9

 
2.0

 
0.5

 
0.7

Amortization of actuarial loss
1.6

 
1.2

 
0.2

 
0.1

Expected return on plan assets
(2.5
)
 
(2.3
)
 
(0.7
)
 
(0.9
)
Net postretirement pension expense
$
1.0

 
$
0.9

 
$
0.1

 
$
—


During the three months ended March 31, 2015 and 2014, the Company contributed $1.6 million and $1.5 million to its U.S. defined benefit plan, respectively, and $1.1 million and $0.4 million to its non-U.S. defined benefit plans, respectively.
For the year ended December 31, 2015, the Company expects to contribute up to $7.8 million to the U.S. benefit plan and up to $1.2 million to the non-U.S. benefit plans.
During the three months ended March 31, 2015, the Company repurchased all of the remaining shares of its common stock from its U.S benefit plan for a total cost of $3.6 million. The repurchases were made under the stock repurchase program further outlined in Note 9 – Stockholders’ Equity. At December 31, 2014, total assets of the U.S. benefit plan included 0.2 million of the Company’s common stock shares, valued at $3.6 million. The value of the shares was determined using quoted market prices (Level 1 input).