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Marketable Securities (Details) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
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Mar. 25, 2012
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Mar. 27, 2011
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Mar. 25, 2012
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Mar. 27, 2011
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| Marketable Securities [Abstract] | ||||
| Effective ownership interest in debt mutual fund (fair value option) | 21.00% | 21.00% | ||
| Increases in fair value of debt mutual fund (fair value option) | $ 17 | $ 13 | $ 22 | $ 18 |
| Debt securities classified as trading, unrealized holding gain | $ 12 | $ 0 | $ 10 | $ 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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| X | ||||||||||
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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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