Fair Value Measurements - Financial Assets and Liabilities at Fair Value (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 30, 2018
Financial assets and liabilities at fair value
Derivatives designated as hedging instruments : Assets	$ 663
Derivatives designated as hedging instruments : Liabilities	866
Available-for-sale Securities, Equity Securities	830	$ 511
Available-for-sale Securities	4,673	9,734
Total Gross Assets	696	694
Credit Support Agreement (CSA)	(592)	(423)
Total Net Asset	104	271
Total Gross Liabilities	892	872
Credit Support Agreement (CSA)	(652)	(605)
Total Net Liabilities	240	267
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	830	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	663	662
Derivatives designated as hedging instruments : Liabilities	866	840
Available-for-sale Securities, Equity Securities	0
Available-for-sale Securities	4,673
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
Interest Rate Contract
Financial assets and liabilities at fair value
Derivative, Notional Amount	500	500
Derivatives designated as hedging instruments : Assets	383
Derivatives designated as hedging instruments : Liabilities	295
Derivative Assets, Noncurrent		6
Derivative Liabilities, Noncurrent - interest swap	2	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	383	161
Derivatives designated as hedging instruments : Liabilities	295	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
Foreign exchange contracts
Financial assets and liabilities at fair value
Derivative, Notional Amount	44,000	41,100
Derivatives designated as hedging instruments : Assets	280
Derivatives designated as hedging instruments : Liabilities	571
Derivatives not designated as hedging instruments : Assets	33
Derivatives not designated as hedging instruments : Liabilities	26
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
Foreign exchange contracts \| Significant other observable inputs Level 2
Financial assets and liabilities at fair value
Derivatives designated as hedging instruments : Assets	280	501
Derivatives designated as hedging instruments : Liabilities	571	548
Derivatives not designated as hedging instruments : Assets	33	32
Derivatives not designated as hedging instruments : Liabilities	26	32
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	11,300	7,300
Equity Securities
Financial assets and liabilities at fair value
Available-for-sale Securities, Equity Securities	$ 830	$ 511

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

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