Fair Value Measurements - Financial Assets and Liabilities at Fair Value (Details) - USD ($) $ in Millions	Jul. 02, 2017	Jan. 01, 2017
Financial assets and liabilities at fair value
Derivatives designated as hedging instruments : Assets	$ 433
Derivatives designated as hedging instruments : Liabilities	777
Available-for-sale Securities, Equity Securities	1,040	$ 1,209
Available-for-sale Securities	3,599	12,087
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	1,040	1,209
Available-for-sale Securities	0
Significant other observable inputs Level 2
Financial assets and liabilities at fair value
Derivatives designated as hedging instruments : Assets	433	778
Derivatives designated as hedging instruments : Liabilities	777	1,162
Available-for-sale Securities, Equity Securities	0
Available-for-sale Securities	3,599
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
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	1,800	1,800
Financial assets and liabilities at fair value
Derivatives designated as hedging instruments : Assets	15
Derivatives designated as hedging instruments : Liabilities	273
Derivative Assets, Noncurrent	11	23
Derivative Liabilities, Noncurrent	273	382
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	15	31
Derivatives designated as hedging instruments : Liabilities	273	382
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
Equity Contract
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	200	300
Financial assets and liabilities at fair value
Derivatives designated as hedging instruments : Liabilities	50
Equity 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 : Liabilities	0
Equity Contract \| Significant other observable inputs Level 2
Financial assets and liabilities at fair value
Derivatives designated as hedging instruments : Liabilities	50	57
Equity Contract \| Significant unobservable inputs Level 3
Financial assets and liabilities at fair value
Derivatives designated as hedging instruments : Liabilities	0
Foreign exchange contracts
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	35,800	36,000
Financial assets and liabilities at fair value
Derivatives designated as hedging instruments : Assets	418
Derivatives designated as hedging instruments : Liabilities	454
Derivatives not designated as hedging instruments : Assets	56
Derivatives not designated as hedging instruments : Liabilities	31
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	418	747
Derivatives designated as hedging instruments : Liabilities	454	723
Derivatives not designated as hedging instruments : Assets	56	34
Derivatives not designated as hedging instruments : Liabilities	31	57
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 Contract [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	2,300	2,300
Equity Securities [Member]
Financial assets and liabilities at fair value
Available-for-sale Securities, Equity Securities	496	520
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	548	757
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	4	$ 68
Other Current Assets [Member] \| Equity Securities [Member]
Financial assets and liabilities at fair value
Available-for-sale Securities, Equity Securities	$ 204

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

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column B

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Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
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-Subparagraph (b)
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Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

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Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

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Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled after one year or the normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.

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Aggregate fair value of all derivative assets designated as hedging instruments. Includes instruments designated as cash flow hedges, fair value hedges, and hedges of net investments in foreign operations.

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Aggregate fair value of all derivative liabilities designated as hedging instruments. Includes instruments designated as cash flow hedges, fair value hedges, and hedges of net investments in foreign operations.

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Fair value as of the balance sheet date of all foreign currency derivative assets not designated as hedging instruments.

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Fair value as of the balance sheet date of all foreign currency derivative liabilities not designated as hedging instruments.

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