Financial Instruments (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 26, 2015	Dec. 27, 2014
Derivatives, Fair Value [Line Items]
Available-for-sale Equity Securities, Accumulated Gross Unrealized Gain, before Tax	$ 72,000,000	$ 115,000,000
Debt instrument, fair value	38,000,000,000	35,000,000,000
Charges related to the transaction with Tingyi	$ 373,000,000	$ 73,000,000	$ 0
Tingyi Charge per share	$ 0.26	$ 0.05
Call Option For Indirect Equity Percentage		20.00%
Foreign Exchange Contract
Derivatives, Fair Value [Line Items]
Derivative, Higher Remaining Maturity Date	2 years
Derivative, Notional Amount	$ 1,600,000,000	$ 2,100,000,000
Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	$ 11,200,000,000	12,500,000,000
Commodity Contracts
Derivatives, Fair Value [Line Items]
Derivative, Higher Remaining Maturity Date	3 years
Expected reclassification of net gain/(losses) related to hedge from accumulated OCI into net income within the next 12 months	$ 17,000,000
Net Investment Hedging [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	800,000,000
Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Long-term Debt, Percentage Bearing Variable Interest, Amount	$ 0.38	0.33
Revenue Outside U.S. [Domain]
Derivatives, Fair Value [Line Items]
Percent of Revenue	42.00%
Top Five International Countries [Domain]
Derivatives, Fair Value [Line Items]
Percent of Revenue	19.00%
Designated as Hedging Instrument [Member] | Commodity Contracts
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	$ 800,000,000	$ 1,000,000,000