Financial Instruments (Narrative) (Details) - Level 1 - USD ($) $ in Millions |
Sep. 24, 2016 |
Dec. 26, 2015 |
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| Money Market Funds | ||
| Schedule of Investments [Line Items] | ||
| Available-for-sale investments used as collateral | $ 3 | $ 1 |
| Mutual Funds | ||
| Schedule of Investments [Line Items] | ||
| Restricted investments | $ 14 | $ 15 |
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- Definition The fair value of available-for-sale securities that serve as collateral for borrowings. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Investments which are not defined as or included in marketable (debt, equity, or other) securities whose use is restricted in whole or in part, generally by contractual agreements or regulatory requirements. For use in an unclassified balance sheet. No definition available.
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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