Quarterly report pursuant to Section 13 or 15(d)

Pension and Other Postretirement Benefit Plans (Details)

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Pension and Other Postretirement Benefit Plans (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 27, 2019
Sep. 28, 2018
Sep. 27, 2019
Sep. 28, 2018
Net periodic pension and other Postretirement benefit cost        
Contributions to pension plan     $ 29 $ 98
Pension Benefits        
Net periodic pension and other Postretirement benefit cost        
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) $ (2) $ 21 $ (7) 53
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets     7.70%  
Service cost 26 30 $ 78 93
Interest cost 73 75 218 221
Expected return on plan assets (138) (160) (414) (490)
Amortization of prior service cost (credit) (1) (1) (3) 3
Amortization of net actuarial loss 38 29 114 92
Defined Benefit Plan Net Periodic Benefit Cost Excluding Settlement Curtailment and Special Termination Benefits (2) (27) (7) (81)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment 0 5 0 5
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement 0 35 0 121
Defined Benefit Plan, Cost of Providing Special and Contractual Termination Benefits 0 8 0 8
Other Benefits        
Net periodic pension and other Postretirement benefit cost        
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) 6 3 $ 17 8
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets     4.60%  
Service cost 2 3 $ 7 8
Interest cost 7 6 20 18
Expected return on plan assets (3) (3) (10) (10)
Amortization of prior service cost (credit) (1) (4) (2) (11)
Amortization of net actuarial loss 1 1 2 3
Defined Benefit Plan Net Periodic Benefit Cost Excluding Settlement Curtailment and Special Termination Benefits 6 3 17 8
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment 0 0 0 0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement 0 0 0 0
Defined Benefit Plan, Cost of Providing Special and Contractual Termination Benefits $ 0 $ 0 $ 0 $ 0