Fair Value Measurements - Financial Assets and Liabilities at Fair Value (Details) - USD ($) $ in Millions	Oct. 01, 2017	Jan. 01, 2017
Financial assets and liabilities at fair value
Derivatives designated as hedging instruments : Assets	$ 572
Derivatives designated as hedging instruments : Liabilities	508
Available-for-sale Securities, Equity Securities	920	$ 1,209
Available-for-sale Securities	3,044	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	920	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	572	778
Derivatives designated as hedging instruments : Liabilities	508	1,162
Available-for-sale Securities, Equity Securities	0
Available-for-sale Securities	3,044
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	16
Derivatives designated as hedging instruments : Liabilities	210
Derivative Assets, Noncurrent	10	23
Derivative Liabilities, Noncurrent	210	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	16	31
Derivatives designated as hedging instruments : Liabilities	210	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	100	300
Financial assets and liabilities at fair value
Derivatives designated as hedging instruments : Liabilities	6
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	6	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	34,700	36,000
Financial assets and liabilities at fair value
Derivatives designated as hedging instruments : Assets	556
Derivatives designated as hedging instruments : Liabilities	292
Derivatives not designated as hedging instruments : Assets	38
Derivatives not designated as hedging instruments : Liabilities	72
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	556	747
Derivatives designated as hedging instruments : Liabilities	292	723
Derivatives not designated as hedging instruments : Assets	38	34
Derivatives not designated as hedging instruments : Liabilities	72	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	506	520
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	414	757
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	1	$ 68
Other Current Assets [Member] \| Equity Securities [Member]
Financial assets and liabilities at fair value
Available-for-sale Securities, Equity Securities	$ 46

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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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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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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