Pension Benefits Components of Pension Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Global defined benefit plans
Defined Benefit Plan Disclosure [Line Items]
401(k) expense	$ 38	$ 41	$ 39
Pension
Defined Benefit Plan Disclosure [Line Items]
Pension (income) expense	165	(255)	293
Pension | Global defined benefit plans
Defined Benefit Plan Disclosure [Line Items]
Service Cost	87	96
Interest Cost	165	164
Net periodic benefit cost	168	(138)	256
Curtailment and special termination benefits	(30)	(151)	1
Pension (income) expense	138	(289)	257
Defined Benefit Plan, Expected Amortization of Prior Service Cost (Credit), Next Fiscal Year	7
Pension | Foreign and U.S. Multiemployer defined contribution plans
Defined Benefit Plan Disclosure [Line Items]
Pension (income) expense	27	34	36
COGS and SGA | Pension | Global defined benefit plans
Defined Benefit Plan Disclosure [Line Items]
Service Cost	87	96	98
OIE | Pension | Global defined benefit plans
Defined Benefit Plan Disclosure [Line Items]
Interest Cost	165	164	174
Expected Return on Plan Assets	(361)	(371)	(352)
Amortization of Unrecognized Prior Service Cost (Credit)	8	9	13
Recognized net (gain) loss	$ 269	$ (36)	$ 323