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Pension and Retiree Medical Benefits
3 Months Ended
Mar. 23, 2013
Compensation and Retirement Disclosure [Abstract]  
Pension and Retiree Medical Benefits
Pension and Retiree Medical Benefits

The components of net periodic benefit cost for pension and retiree medical plans are as follows: 
 
12 Weeks Ended
 
Pension
 
Retiree Medical
 
3/23/2013

 
3/24/2012

 
3/23/2013

 
3/24/2012

 
3/23/2013

 
3/24/2012

 
U.S.
 
International
 
 
Service cost
$
108

 
$
95

 
$
22

 
$
18

 
$
10

 
$
12

Interest cost
121

 
123

 
22

 
20

 
13

 
15

Expected return on plan assets
(190
)
 
(184
)
 
(30
)
 
(26
)
 
(6
)
 
(5
)
Amortization of prior service cost/(benefit)
4

 
4

 

 

 
(5
)
 
(6
)
Amortization of net losses
67

 
60

 
13

 
10

 

 

 
110

 
98

 
27

 
22

 
12

 
16

Settlement/curtailment gain

 
(7
)
 

 

 

 

Special termination benefits
1

 
4

 

 

 

 
4

Total expense
$
111

 
$
95

 
$
27

 
$
22

 
$
12

 
$
20

 
 
 
 
 
 
 
 
 
 
 
 


During the first quarter of 2013, we made discretionary contributions of $13 million to our international pension plans. During the first quarter of 2012, we made discretionary contributions of $860 million to our U.S. pension plans and $140 million to our U.S. retiree medical plans.