Nonpension Postretirement and Postemployment Benefits Change in Projected Benefit Obligations, Plan Assets, and Funded Status, Postretirement (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016
Amounts Recognized in Balance Sheet
Other Assets	$ 252	$ 66
Other Liabilities	(40)	(40)
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss)
Prior Service Cost	48	56
Net Amount Recognized	48	56
Nonpension Postretirement [Member]
Defined Benefit Plan Change In Accumulated Benefit Obligation [Roll Forward]
Beginning of Year	1,161	1,163
Service Cost	18	21
Interest Cost	37	39
Actuarial Gain (Loss)	29	2
Benefits Paid	(61)	(65)
Curtailments and special termination benefits	3	0
Plan Amendments	0	0
Foreign Currency Adjustments	3	1
End of Year	1,190	1,161
Change in plan assets
Fair Value, Beginning of Year	1,136	1,084
Actual Return on Plan Assets	217	111
Employer Contributions	13	15
Benefits Paid, Plan Assets	(74)	(74)
Fair Value, End of Year	1,292	1,136
Funded Status	102	(25)
Amounts Recognized in Balance Sheet
Other Assets	144	17
Other Current Liabilities	(2)	(2)
Other Liabilities	(40)	(40)
Net Amount Recognized	102	(25)
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss)
Prior Service Cost	(77)	(86)
Net Amount Recognized	$ (77)	$ (86)