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Pension and Other Postretirement Benefit Plans (Tables)
 9 Months Ended
Sep. 27, 2013
Pension and Other Postretirement Benefit Plans  
Periodic benefit cost, pension and other postretirement benefit plans
Net periodic benefit cost for our pension and other postretirement benefit plans consisted of the following during the three and nine months ended September 27, 2013, and September 28, 2012, respectively (in millions):
 
Pension Benefits  
 
Other Benefits  
 
Three Months Ended
 
September 27,
2013

September 28,
2012

 
September 27,
2013

September 28,
2012

Service cost
$
69

$
88

 
$
9

$
8

Interest cost
93

97

 
10

11

Expected return on plan assets
(163
)
(143
)
 
(2
)
(2
)
Amortization of prior service cost (credit)
(1
)
(1
)
 
(3
)
(13
)
Amortization of net actuarial loss
50

34

 
3

2

Total cost (credit) recognized in statements of income
$
48

$
75

 
$
17

$
6


 
Pension Benefits  
 
Other Benefits  
 
Nine Months Ended
 
September 27,
2013

September 28,
2012

 
September 27,
2013

September 28,
2012

Service cost
$
207

$
224

 
$
27

$
25

Interest cost
282

292

 
31

33

Expected return on plan assets
(492
)
(431
)
 
(7
)
(6
)
Amortization of prior service cost (credit)
(2
)
(2
)
 
(8
)
(39
)
Amortization of net actuarial loss
149

102

 
9

5

Total cost (credit) recognized in statements of income
$
144

$
185

 
$
52

$
18