Financial Instruments (Details) (Schedule of Available-For-Sale Securities and Fair Value Measurements) (USD $) In Millions, unless otherwise specified	Dec. 27, 2014	Dec. 28, 2013
Schedule of Available-for-sale Securities [Line Items]
Cash and cash equivalents, at fair value	$ 805	$ 869
Current marketable securities, at fair value	235	228
Noncurrent marketable securities, at fair value	0	90
Cash, cash equivalents and marketable securities, at fair value	1,040	1,187
Fair value, inputs, level 1
Schedule of Available-for-sale Securities [Line Items]
Cash and cash equivalents, at fair value	4	19
Noncurrent marketable securities, at fair value	0	2
Cash, cash equivalents and marketable securities, at fair value	4	21
Fair value, inputs, level 2
Schedule of Available-for-sale Securities [Line Items]
Cash and cash equivalents, at fair value	410	421
Current marketable securities, at fair value	235	228
Noncurrent marketable securities, at fair value	0	88
Cash, cash equivalents and marketable securities, at fair value	645	737
Contracts Designated as Cash Flow Hedging Instruments
Schedule of Available-for-sale Securities [Line Items]
Derivative, at fair value	(6)	(3)
Contracts not Designated as Hedging Instruments
Schedule of Available-for-sale Securities [Line Items]
Derivative, at fair value	(1)	(1)
Contracts Designated as Fair Value Hedging Instruments
Schedule of Available-for-sale Securities [Line Items]
Derivative, at fair value	3	0
Cash
Schedule of Available-for-sale Securities [Line Items]
Cash and cash equivalents, at fair value	391	429
Cash, cash equivalents and marketable securities, at fair value	391	429
Money market funds
Schedule of Available-for-sale Securities [Line Items]
Cash and cash equivalents, at fair value	4	19
Noncurrent marketable securities, at fair value	0	2
Cash, cash equivalents and marketable securities, at fair value	4	21
Available-for-sale securities pledged as collateral	10	18
Money market funds \| Fair value, inputs, level 1
Schedule of Available-for-sale Securities [Line Items]
Other assets, at fair value	16	14
Commercial paper
Schedule of Available-for-sale Securities [Line Items]
Cash and cash equivalents, at fair value	410	421
Current marketable securities, at fair value	208	178
Cash, cash equivalents and marketable securities, at fair value	618	599
Time deposits
Schedule of Available-for-sale Securities [Line Items]
Current marketable securities, at fair value		50
Cash, cash equivalents and marketable securities, at fair value		50
Corporate bond
Schedule of Available-for-sale Securities [Line Items]
Current marketable securities, at fair value	27	0
Noncurrent marketable securities, at fair value	0	88
Cash, cash equivalents and marketable securities, at fair value	27	88
Mutual funds \| Fair value, inputs, level 1
Schedule of Available-for-sale Securities [Line Items]
Other assets, at fair value	$ 10	$ 18

Fair value portion of cash, cash equivalents and marketable securities.

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This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item includes debt and equity securities available-for-sale which are intended to be held for less than one year or the normal operating cycle, whichever is longer.

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- Definition

The fair value of available-for-sale securities that serve as collateral for borrowings.

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Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Fair value of the assets less the liabilities of a derivative or group of derivatives.

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Fair value portion of other assets.

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