Financial Instruments (Fair Values of Financial Assets and Liabilities) (Details) - USD ($) $ in Millions	Dec. 28, 2019	Dec. 29, 2018
Derivatives, Fair Value [Line Items]
Senior Notes	$ 2,200	$ 7,700
Short-term Investments	229	272
Total asset derivatives at fair value	41	55
Total liability derivatives at fair value	470	568
Total Financial Assets at Fair Value	287	3,931
Total Financial Liabilities at Fair Value	938	1,018
Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease)	5
Derivatives Designated As Cash Flow Hedging Instruments Assets [Member]
Derivatives, Fair Value [Line Items]
Derivatives designated as hedging instruments, Assets, Total	9	44
Derivatives Designated As Cash Flow Hedging Instruments Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivatives designated as hedging instruments, Liabilities, Total	432	341
Derivatives Not Designated As Hedging Instruments Assets [Member]
Derivatives, Fair Value [Line Items]
Derivatives not designated as hedging instruments, Assets, Total	32	10
Derivatives Not Designated As Hedging Instruments Liabilities [Member]
Derivatives, Fair Value [Line Items]
Other Derivatives Not Designated as Hedging Instruments Liabilities at Fair Value	33	119
Fair Value, Inputs, Level 1 [Member] \| Derivatives Designated As Cash Flow Hedging Instruments Assets [Member]
Derivatives, Fair Value [Line Items]
Commodity contracts - other	2	0
Fair Value, Inputs, Level 1 [Member] \| Derivatives Designated As Cash Flow Hedging Instruments Liabilities [Member]
Derivatives, Fair Value [Line Items]
Commodity contracts - other	5	1
Fair Value, Inputs, Level 1 [Member] \| Derivatives Not Designated As Hedging Instruments Assets [Member]
Derivatives, Fair Value [Line Items]
Commodity contracts - other	23	2
Fair Value, Inputs, Level 1 [Member] \| Derivatives Not Designated As Hedging Instruments Liabilities [Member]
Derivatives, Fair Value [Line Items]
Commodity contracts - other	7	17
Fair Value, Inputs, Level 2 [Member] \| Derivatives Designated As Fair Value Hedging Instruments Assets [Member]
Derivatives, Fair Value [Line Items]
Interest rate derivatives	0	1
Fair Value, Inputs, Level 2 [Member] \| Derivatives Designated As Fair Value Hedging Instruments Liabilities [Member]
Derivatives, Fair Value [Line Items]
Interest rate derivatives	5	108
Fair Value, Inputs, Level 2 [Member] \| Derivatives Designated As Cash Flow Hedging Instruments Assets [Member]
Derivatives, Fair Value [Line Items]
Foreign Exchange Forward contracts	5	44
Interest rate derivatives	0	0
Commodity contracts - other	2	0
Fair Value, Inputs, Level 2 [Member] \| Derivatives Designated As Cash Flow Hedging Instruments Liabilities [Member]
Derivatives, Fair Value [Line Items]
Foreign Exchange Forward contracts	32	14
Interest rate derivatives	390	323
Commodity contracts - other	5	3
Fair Value, Inputs, Level 2 [Member] \| Derivatives Not Designated As Hedging Instruments Assets [Member]
Derivatives, Fair Value [Line Items]
Foreign Exchange Forward contracts	3	3
Commodity contracts - other	6	5
Fair Value, Inputs, Level 2 [Member] \| Derivatives Not Designated As Hedging Instruments Liabilities [Member]
Derivatives, Fair Value [Line Items]
Foreign Exchange Forward contracts	2	10
Commodity contracts - other	24	92
Fair Value, Inputs, Level 2 [Member] \| Assets [Member]
Derivatives, Fair Value [Line Items]
Debt Securities, Available-for-sale	0	3,658
Fair Value, Inputs, Level 2 [Member] \| Liability [Member]
Derivatives, Fair Value [Line Items]
Debt Securities, Available-for-sale	0	0
Fair Value, Inputs, Level 2 [Member] \| Assets [Member]
Derivatives, Fair Value [Line Items]
Prepaid Forward Asset Fair Value	17	22
Deferred compensation	0	0
Fair Value, Inputs, Level 2 [Member] \| Liability [Member]
Derivatives, Fair Value [Line Items]
Prepaid Forward Asset Fair Value	0	0
Deferred compensation	468	450
Assets [Member] \| Fair Value, Inputs, Level 1 [Member]
Derivatives, Fair Value [Line Items]
Short-term Investments	229	196
Liability [Member] \| Fair Value, Inputs, Level 1 [Member]
Derivatives, Fair Value [Line Items]
Short-term Investments	0	0
Commodity Contract [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	$ 1,100	$ 1,100

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The fair value of the entity's total financial assets.

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