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Retirement Plans
 3 Months Ended
Mar. 31, 2013
Retirement Plans [Abstract]  
Retirement Plans
(9) Retirement Plans

 
The components of the net periodic benefit cost for our plans were as follows:

3 Months Ended March 31,
Defined Benefit
Retiree Health
Pension Plans
Care Plan
2013
2012
2013
2012
Service cost
$
2.2
$
2.6
$
-
$
-
Interest cost
3.1
3.7
0.3
0.3
Expected return on assets
(2.8
)
(3.6
)
-
-
Other
0.9
0.4
0.1
-
Net periodic benefit cost
$
3.4
$
3.1
$
0.4
$
0.3

Effective January 1, 2013, we amended a defined benefit plan in the Netherlands. The defined benefit plan was frozen, and the participants were transitioned to a defined contribution plan. In April 2013, following the approval by the local Workers' Council, we recognized a curtailment gain of €1.8 ($2.3) related to this amendment.

During the three months ended March 31, 2013, contributions made to our pension plans were $4.0 and contributions made to our retiree health care plan were $0.5. During 2013, we expect to make total contributions of $18.0 to our pension plans and to fund our retiree health care payments as incurred.