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
Mar. 30, 2018
Mar. 31, 2017
Net periodic pension and other Postretirement benefit cost    
Contributions to pension plan $ 27 $ 43
Pension plans, anticipated additional contributions for remainder of current fiscal year $ 24  
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 $ 32 50
Interest cost 73 78
Expected return on plan assets (168) (161)
Amortization of prior service cost (credit) 2 0
Amortization of net actuarial loss 34 44
Net periodic benefit cost (credit) (27) 11
Special termination benefits 0 18
Total cost recognized in statements of income $ (27) 29
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 5
Interest cost 6 8
Expected return on plan assets (3) (3)
Amortization of prior service cost (credit) (4) (5)
Amortization of net actuarial loss 1 2
Net periodic benefit cost (credit) 3 7
Special termination benefits 0 0
Total cost recognized in statements of income $ 3 $ 7