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Pension and Retiree Medical Benefits
 6 Months Ended
Jun. 11, 2016
Compensation and Retirement Disclosure [Abstract]  
Pension and Retiree Medical Benefits
Pension and Retiree Medical Benefits
Effective as of the beginning of 2016, we prospectively changed the method we use to estimate the service and interest cost components of pension and retiree medical expense. The pre-tax reduction in net periodic benefit cost associated with this change in the 12 and 24 weeks ended June 11, 2016 was $29 million ($19 million after-tax or $0.01 per share) and $57 million ($37 million after-tax or $0.03 per share), respectively. See “Pension and Retiree Medical Plans” in “Our Critical Accounting Policies” in Management’s Discussion and Analysis of Financial Condition and Results of Operations for further unaudited information on this change in accounting estimate.
The components of net periodic benefit cost for pension and retiree medical plans are as follows: 
 
12 Weeks Ended
 
Pension

Retiree Medical
 
6/11/2016


6/13/2015


6/11/2016


6/13/2015


6/11/2016


6/13/2015

 
U.S.

International

 
Service cost
$
90


$
100


$
21


$
26


$
7


$
8

Interest cost
112


126


24


29


10


12

Expected return on plan assets
(192
)

(197
)

(42
)

(45
)

(6
)

(6
)
Amortization of prior service credit
—


—


—


—


(8
)

(9
)
Amortization of net losses/(gains)
39


48


10


18


(1
)

1


49


77


13


28


2


6

Settlement/curtailment loss
—

 
—

 
6

 
—

 
—

 
—

Special termination benefits
1


1


—


—


—


—

Total expense
$
50


$
78


$
19


$
28


$
2


$
6


 
24 Weeks Ended
 
Pension
 
Retiree Medical
 
6/11/2016

 
6/13/2015

 
6/11/2016

 
6/13/2015

 
6/11/2016

 
6/13/2015

 
U.S.
 
International
 
 
Service cost
$
181

 
$
201

 
$
36

 
$
45

 
$
14

 
$
16

Interest cost
223

 
252

 
42

 
51

 
19

 
24

Expected return on plan assets
(384
)
 
(393
)
 
(73
)
 
(78
)
 
(11
)
 
(12
)
Amortization of prior service credit
—

 
(1
)
 
—

 
—

 
(17
)
 
(18
)
Amortization of net losses/(gains)
77

 
95

 
18

 
32

 
(1
)
 
1

 
97

 
154

 
23

 
50

 
4

 
11

Settlement/curtailment loss
—

 
—

 
6

 
—

 
—

 
—

Special termination benefits
1

 
5

 
—

 
—

 
—

 
1

Total expense
$
98

 
$
159

 
$
29

 
$
50

 
$
4

 
$
12

We regularly evaluate different opportunities to reduce risk and volatility associated with our pension and retiree medical plans. During the first quarter of 2016, we made discretionary contributions of $7 million to our international pension plans. There were no discretionary contributions made in the second quarter of 2016. In addition, there were no discretionary contributions made in the first or second quarters of 2015.