Fair Value Measurements - Financial Assets and Liabilities at Fair Value (Details) - USD ($) $ in Millions	Apr. 02, 2017	Jan. 01, 2017
Financial assets and liabilities at fair value
Derivatives designated as hedging instruments : Assets	$ 320
Derivatives designated as hedging instruments : Liabilities	984
Available-for-sale Securities, Equity Securities	1,008	$ 1,209
Available-for-sale Securities	26,808	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	1,008	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	320	778
Derivatives designated as hedging instruments : Liabilities	984	1,162
Available-for-sale Securities, Equity Securities	0
Available-for-sale Securities	26,808
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	29
Derivatives designated as hedging instruments : Liabilities	345
Derivative Assets, Noncurrent	21	23
Derivative Liabilities, Noncurrent	345	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	29	31
Derivatives designated as hedging instruments : Liabilities	345	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	63
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	63	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	33,100	36,000
Financial assets and liabilities at fair value
Derivatives designated as hedging instruments : Assets	291
Derivatives designated as hedging instruments : Liabilities	576
Derivatives not designated as hedging instruments : Assets	26
Derivatives not designated as hedging instruments : Liabilities	62
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	291	747
Derivatives designated as hedging instruments : Liabilities	576	723
Derivatives not designated as hedging instruments : Assets	26	34
Derivatives not designated as hedging instruments : Liabilities	62	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	471	520
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	607	757
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	70	$ 68
Other Current Assets [Member] \| Equity Securities [Member]
Financial assets and liabilities at fair value
Available-for-sale Securities, Equity Securities	$ 246

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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