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 6 Months Ended
Jun. 29, 2018
Jun. 30, 2017
Jun. 29, 2018
Jun. 30, 2017
Net periodic pension and other Postretirement benefit cost        
Contributions to pension plan     $ 34 $ 55
Pension plans, anticipated additional contributions for remainder of current fiscal year $ 63   $ 63  
Pension Benefits        
Net periodic pension and other Postretirement benefit cost        
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets     8.00%  
Service cost 31 $ 50 $ 63 100
Interest cost 73 78 146 156
Expected return on plan assets (162) (163) (330) (324)
Amortization of prior service cost (credit) 2 0 4 0
Amortization of net actuarial loss 29 45 63 89
Net periodic benefit cost (credit) (27) 10 (54) 21
Special termination benefits 0 39 0 57
Total cost recognized in statements of income 59 49 32 78
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Curtailment 0 0 0 0
Defined Benefit Plan, Benefit Obligation, Payment for Settlement 86 0 $ 86 0
Other Benefits        
Net periodic pension and other Postretirement benefit cost        
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets     4.50%  
Service cost 2 4 $ 5 9
Interest cost 6 7 12 15
Expected return on plan assets (4) (3) (7) (6)
Amortization of prior service cost (credit) (3) (4) (7) (9)
Amortization of net actuarial loss 1 2 2 4
Net periodic benefit cost (credit) 2 6 5 13
Special termination benefits 0 0 0 0
Total cost recognized in statements of income 2 (36) 5 (29)
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Curtailment 0 (42) 0 (42)
Defined Benefit Plan, Benefit Obligation, Payment for Settlement $ 0 $ 0 $ 0 $ 0