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Marketable Securities (Details) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | |
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Sep. 30, 2012
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Sep. 25, 2011
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| Marketable Securities [Abstract] | ||
| Effective ownership interest in debt fund (fair value option) | 22.00% | |
| Increases in fair value of debt fund (fair value option) recognized in investment income | $ 45 | $ 9 |
| Net gains recognized on debt securities classified as trading that are still held at the end of the period | $ 22 | $ 0 |
| X | ||||||||||
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- Definition
This element represents the changes in fair value of debt mutual fund for which the entity elected fair value option. No definition available.
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- Definition
This element represents the effective ownership interest in debt mutual fund for which the entity elected fair value option. No definition available.
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of trading securities held at each balance sheet date, that was included in earnings for the period. Trading securities are bought and held principally for the purpose of selling them in the near term (thus held for only a short period of time) and the change in net unrealized holding gain (loss) is included in earnings for the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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