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 9 Months Ended
Sep. 28, 2018
Sep. 29, 2017
Jun. 29, 2018
Sep. 28, 2018
Sep. 29, 2017
Net periodic pension and other Postretirement benefit cost          
Contributions to pension plan       $ 98 $ 88
Pension plans, anticipated additional contributions for remainder of current fiscal year $ 2     2  
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 30 $ 49   93 149
Interest cost 75 76   221 232
Expected return on plan assets 160 164   490 488
Amortization of prior service cost (credit) (1) 0   3 0
Amortization of net actuarial loss 29 44   92 133
Net periodic benefit cost (income) (27) 5   (81) 26
Gain (Loss) Due to Curtailment (5) (2)   (5) (2)
Gain (Loss) Due to Settlement (35) (150)   (121) (150)
Cost of providing special termination benefits 8 15   8 72
Total cost recognized in statements of income 21 172   $ 53 250
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 3 4   $ 8 13
Interest cost 6 7   18 22
Expected return on plan assets 3 3   10 9
Amortization of prior service cost (credit) (4) (4)   (11) (13)
Amortization of net actuarial loss 1 2   3 6
Net periodic benefit cost (income) 3 6   8 19
Gain (Loss) Due to Curtailment 0 0   0 42
Gain (Loss) Due to Settlement 0 0   0 0
Cost of providing special termination benefits 0 0   0 0
Total cost recognized in statements of income $ 3 $ 6   $ 8 $ (23)