Fair Value Measurements - Financial Assets and Liabilities at Fair Value (Details) - USD ($) $ in Millions	Dec. 30, 2018	Dec. 31, 2017
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	$ 694	$ 463
Derivative Asset, Fair Value, Gross Liability	(423)	(76)
Financial assets and liabilities at fair value
Derivative assets	271	387
Derivative liabilities	267	367
Derivative Liability, Fair Value, Gross Liability	872	605
Derivative Liability, Fair Value, Gross Asset	(605)	(238)
Equity Securities
Financial assets and liabilities at fair value
Equity investments	511	751
Level 1
Financial assets and liabilities at fair value
Equity method investments, fair market disclosure	511	751
Debt securities	0
Level 2
Financial assets and liabilities at fair value
Equity method investments, fair market disclosure	0
Debt securities	9,734	5,310
Level 3
Financial assets and liabilities at fair value
Equity method investments, fair market disclosure	0
Debt securities	0
Interest rate swaps contracts:
Financial assets and liabilities at fair value
Non-current assets included in interest rate contracts	6	7
Non-current liabilities included in interest rate contracts	3	9
Designated as Hedging Instrument
Financial assets and liabilities at fair value
Derivative assets	662
Derivative liabilities	840
Designated as Hedging Instrument | Level 1
Financial assets and liabilities at fair value
Derivative assets	0
Derivative liabilities	0
Designated as Hedging Instrument | Level 2
Financial assets and liabilities at fair value
Derivative assets	662	425
Derivative liabilities	840	567
Designated as Hedging Instrument | Level 3
Financial assets and liabilities at fair value
Derivative assets	0
Derivative liabilities	0
Designated as Hedging Instrument | Interest rate swaps contracts:
Financial assets and liabilities at fair value
Derivative assets	161
Derivative liabilities	292
Designated as Hedging Instrument | Interest rate swaps contracts: | Level 1
Financial assets and liabilities at fair value
Derivative assets	0
Derivative liabilities	0
Designated as Hedging Instrument | Interest rate swaps contracts: | Level 2
Financial assets and liabilities at fair value
Derivative assets	161	7
Derivative liabilities	292	165
Designated as Hedging Instrument | Interest rate swaps contracts: | Level 3
Financial assets and liabilities at fair value
Derivative assets	0
Derivative liabilities	0
Designated as Hedging Instrument | Foreign exchange contracts
Financial assets and liabilities at fair value
Derivative assets	501
Derivative liabilities	548
Designated as Hedging Instrument | Foreign exchange contracts | Level 1
Financial assets and liabilities at fair value
Derivative assets	0
Derivative liabilities	0
Designated as Hedging Instrument | Foreign exchange contracts | Level 2
Financial assets and liabilities at fair value
Derivative assets	501	418
Derivative liabilities	548	402
Designated as Hedging Instrument | Foreign exchange contracts | Level 3
Financial assets and liabilities at fair value
Derivative assets	0
Derivative liabilities	0
Not Designated as Hedging Instrument | Foreign exchange contracts
Financial assets and liabilities at fair value
Derivative assets	32
Derivative liabilities	32
Not Designated as Hedging Instrument | Foreign exchange contracts | Level 1
Financial assets and liabilities at fair value
Derivative assets	0
Derivative liabilities	0
Not Designated as Hedging Instrument | Foreign exchange contracts | Level 2
Financial assets and liabilities at fair value
Derivative assets	32	38
Derivative liabilities	32	$ 38
Not Designated as Hedging Instrument | Foreign exchange contracts | Level 3
Financial assets and liabilities at fair value
Derivative assets	0
Derivative liabilities	$ 0