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Retirement and Other Employee Benefits
3 Months Ended
Mar. 30, 2012
Compensation and Retirement Disclosure [Abstract]  
Retirement and Other Employee Benefits
Retirement and Other Employee Benefits
 
The following table sets forth the net periodic benefit costs of our pension plans and post-retirement plans (U.S. dollars in millions):
 
 
Quarter ended
 
March 30, 2012
 
April 1, 2011
Service cost
$
1.1

 
$
0.9

Interest cost
1.6

 
1.8

Expected return on assets
(0.9
)
 
(1.0
)
Amortization of net actuarial loss
0.3

 
0.4

Net periodic benefit costs
$
2.1

 
$
2.1



We funded our U.S. based non-contributory defined benefit pension plan by $0.8 million and $1.2 million during the quarters ended March 30, 2012 and April 1, 2011. The funding was actuarially determined based on U.S. funding regulations.