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Pension and Retiree Medical Benefits (Tables)
 3 Months Ended
Mar. 25, 2017
Compensation and Retirement Disclosure [Abstract]  
Schedule of Defined Benefit Plans Disclosures [Table Text Block]
The components of net periodic benefit cost for pension and retiree medical plans are as follows: 
 
12 Weeks Ended
 
Pension

Retiree Medical
 
3/25/2017


3/19/2016


3/25/2017


3/19/2016


3/25/2017


3/19/2016

 
U.S.

International

 
Service cost
$
93


$
91


$
16


$
15


$
6


$
7

Interest cost
108


111


15


18


9


9

Expected return on plan assets
(196
)

(192
)

(30
)

(31
)

(5
)

(5
)
Amortization of prior service credits
—


—


—


—


(6
)

(9
)
Amortization of net losses/(gains)
28


38


9


8


(3
)

—


33


48


10


10


1


2

Special termination benefits
1

 
—

 
—

 
—

 
—

 
—

Total expense
$
34


$
48


$
10


$
10


$
1


$
2