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Pension Benefits (Tables)
3 Months Ended
Mar. 19, 2016
Compensation and Retirement Disclosure [Abstract]  
Components of Net Periodic Benefit Cost
The components of net periodic benefit cost associated with our significant U.S. pension plans are as follows:

 
Quarter ended
 
2016
 
2015
Service cost
$
4

 
$
4

Interest cost
13

 
13

Expected return on plan assets
(15
)
 
(14
)
Amortization of net loss
1

 
10

Amortization of prior service cost
1

 

Net periodic benefit cost
$
4

 
$
13