Fair Value Measurements - Financial Assets and Liabilities at Fair Value (Details) - USD ($) $ in Millions	Sep. 29, 2019	Dec. 30, 2018
Financial assets and liabilities at fair value
Derivatives designated as hedging instruments : Assets	$ 1,179
Derivatives designated as hedging instruments : Liabilities	1,045
Available-for-sale Securities, Equity Securities	863	$ 511
Available-for-sale Securities	4,327	9,734
Total Gross Assets	1,211	694
Credit Support Agreement (CSA)	(1,013)	(423)
Total Net Asset	198	271
Total Gross Liabilities	1,083	872
Credit Support Agreement (CSA)	(945)	(605)
Total Net Liabilities	138	267
Business Combination, Contingent Consideration, Liability	1,596	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	863	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	1,179	662
Derivatives designated as hedging instruments : Liabilities	1,045	840
Available-for-sale Securities, Equity Securities	0
Available-for-sale Securities	4,327
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	1,596	335
Interest Rate Contract
Financial assets and liabilities at fair value
Derivative, Notional Amount	500	500
Derivatives designated as hedging instruments : Assets	681
Derivatives designated as hedging instruments : Liabilities	410
Derivative Assets, Noncurrent	1	6
Derivative Liabilities, Noncurrent - interest swap		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	681	161
Derivatives designated as hedging instruments : Liabilities	410	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	47,300	41,100
Derivatives designated as hedging instruments : Assets	498
Derivatives designated as hedging instruments : Liabilities	635
Derivatives not designated as hedging instruments : Assets	32
Derivatives not designated as hedging instruments : Liabilities	38
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	498	501
Derivatives designated as hedging instruments : Liabilities	635	548
Derivatives not designated as hedging instruments : Assets	32	32
Derivatives not designated as hedging instruments : Liabilities	38	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	18,800	7,300
Equity Securities
Financial assets and liabilities at fair value
Available-for-sale Securities, Equity Securities	$ 863	$ 511

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

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