Fair Value Measurements - Financial Assets and Liabilities at Fair Value (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 30, 2018
Financial assets and liabilities at fair value
Derivatives designated as hedging instruments : Assets	$ 576
Derivatives designated as hedging instruments : Liabilities	875
Available-for-sale Securities, Equity Securities	963	$ 511
Available-for-sale Securities	2,767	9,734
Total Gross Assets	599	694
Credit Support Agreement (CSA)	(437)	(423)
Total Net Asset	162	271
Total Gross Liabilities	930	872
Credit Support Agreement (CSA)	(821)	(605)
Total Net Liabilities	109	267
Business Combination, Contingent Consideration, Liability	1,479	335
Quoted prices in active markets for identical assets and liabilities Level 1
Financial assets and liabilities at fair value
Derivatives designated as hedging instruments : Assets	0
Derivatives designated as hedging instruments : Liabilities	0
Available-for-sale Securities, Equity Securities	963	511
Available-for-sale Securities	0
Significant other observable inputs Level 2
Financial assets and liabilities at fair value
Derivatives designated as hedging instruments : Assets	576	662
Derivatives designated as hedging instruments : Liabilities	875	840
Available-for-sale Securities, Equity Securities	0
Available-for-sale Securities	2,767
Significant unobservable inputs Level 3
Financial assets and liabilities at fair value
Derivatives designated as hedging instruments : Assets	0
Derivatives designated as hedging instruments : Liabilities	0
Available-for-sale Securities, Equity Securities	0
Available-for-sale Securities	0
Business Combination, Contingent Consideration, Liability	1,479	335
Interest Rate Contract
Financial assets and liabilities at fair value
Derivative, Notional Amount	500	500
Derivatives designated as hedging instruments : Assets	325
Derivatives designated as hedging instruments : Liabilities	394
Derivative Assets, Noncurrent		6
Derivative Liabilities, Noncurrent - interest swap	1	3
Interest Rate Contract \| Quoted prices in active markets for identical assets and liabilities Level 1
Financial assets and liabilities at fair value
Derivatives designated as hedging instruments : Assets	0
Derivatives designated as hedging instruments : Liabilities	0
Interest Rate Contract \| Significant other observable inputs Level 2
Financial assets and liabilities at fair value
Derivatives designated as hedging instruments : Assets	325	161
Derivatives designated as hedging instruments : Liabilities	394	292
Interest Rate Contract \| Significant unobservable inputs Level 3
Financial assets and liabilities at fair value
Derivatives designated as hedging instruments : Assets	0
Derivatives designated as hedging instruments : Liabilities	0
Forward foreign exchange contracts
Financial assets and liabilities at fair value
Derivative, Notional Amount	49,700	41,100
Derivatives designated as hedging instruments : Assets	251
Derivatives designated as hedging instruments : Liabilities	481
Derivatives not designated as hedging instruments : Assets	23
Derivatives not designated as hedging instruments : Liabilities	55
Forward foreign exchange contracts \| Quoted prices in active markets for identical assets and liabilities Level 1
Financial assets and liabilities at fair value
Derivatives designated as hedging instruments : Assets	0
Derivatives designated as hedging instruments : Liabilities	0
Derivatives not designated as hedging instruments : Assets	0
Derivatives not designated as hedging instruments : Liabilities	0
Forward foreign exchange contracts \| Significant other observable inputs Level 2
Financial assets and liabilities at fair value
Derivatives designated as hedging instruments : Assets	251	501
Derivatives designated as hedging instruments : Liabilities	481	548
Derivatives not designated as hedging instruments : Assets	23	32
Derivatives not designated as hedging instruments : Liabilities	55	32
Forward foreign exchange contracts \| Significant unobservable inputs Level 3
Financial assets and liabilities at fair value
Derivatives designated as hedging instruments : Assets	0
Derivatives designated as hedging instruments : Liabilities	0
Derivatives not designated as hedging instruments : Assets	0
Derivatives not designated as hedging instruments : Liabilities	0
Cross currency interest rate swaps
Financial assets and liabilities at fair value
Derivative, Notional Amount	15,300	7,300
Equity Securities
Financial assets and liabilities at fair value
Available-for-sale Securities, Equity Securities	$ 963	$ 511

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

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