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POSTRETIREMENT BENEFIT PLANS (Tables)
3 Months Ended
Mar. 27, 2016
Pretax Net Periodic Benefit Cost

Our pretax net periodic benefit cost related to our qualified defined benefit pension plans and retiree medical and life insurance plans consisted of the following (in millions):

 

     Quarters Ended  
      March 27,
2016     
     March 29,
2015     
 

Qualified defined benefit pension plans

     

Service cost

   $ 212            $ 217        

Interest cost

     465              448        

Expected return on plan assets

     (667)             (684)       

Recognized net actuarial losses

     340              400        

Amortization of net prior service credits

     (96)             (97)       

Total net periodic benefit cost

   $       254            $       284        

Retiree medical and life insurance plans

     

Service cost

   $ 6            $ 5        

Interest cost

     30              28        

Expected return on plan assets

     (34)             (37)       

Recognized net actuarial losses

     8              11        

Amortization of net prior service costs

     5              1        

Total net periodic benefit cost

   $ 15            $ 8