Financial Instruments (Narrative) (Details) - USD ($)	4 Months Ended	12 Months Ended
	Dec. 30, 2017	Dec. 30, 2017	Dec. 31, 2016	Dec. 26, 2015
Derivatives, Fair Value [Line Items]
Gain (Loss) on Sale of Equity Investments		$ 95,000,000
Gain (Loss) on Sale of Equity Investments, after tax		$ 85,000,000
Gain (Loss) on Sale of Equity Investments, net of tax, per share amount		$ 0.06
Available-for-sale Equity Securities, Accumulated Gross Unrealized Gain, before Tax			$ 72,000,000
indirect equity investment percentage	5.00%	5.00%
indirect equity investment	$ 166,000,000	$ 166,000,000
Call Option For Indirect Equity Percentage				20.00%
Charges related to the transaction with Tingyi		0	$ 373,000,000	$ 73,000,000
Tingyi Charge per share			$ 0.26	$ 0.05
Debt instrument, fair value	41,000,000,000	41,000,000,000	$ 38,000,000,000
Expected reclassification of net gain/(losses) related to hedge from accumulated OCI into net income within the next 12 months		(33,000,000)
Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Long-term Debt, Percentage Bearing Variable Interest, Amount	$ 0.43	0.43	0.38
Commodity Contracts
Derivatives, Fair Value [Line Items]
Derivative, Higher Remaining Maturity Date	3 years
Derivative, Notional Amount	$ 900,000,000	$ 900,000,000	800,000,000
Foreign Exchange Contract
Derivatives, Fair Value [Line Items]
Derivative, Higher Remaining Maturity Date		2 years
Derivative, Notional Amount	1,600,000,000	$ 1,600,000,000	1,600,000,000
Net Investment Hedging [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	1,500,000,000	1,500,000,000	800,000,000
Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	$ 14,200,000,000	$ 14,200,000,000	$ 11,200,000,000
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		20.00%