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Marketable Securities (Details) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | ||
|---|---|---|---|
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Sep. 29, 2013
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Sep. 30, 2012
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Sep. 25, 2011
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| Schedule of Marketable Securities [Line Items] | |||
| Less than 12 months - Fair value | $ 5,642 | $ 1,035 | |
| Less than 12 months - Unrealized losses | (204) | (18) | |
| Marketable Securities [Abstract] | |||
| Effective ownership interest in debt fund (fair value option) | 21.00% | ||
| Increases in fair value of debt fund (fair value option) recognized in investment income | 17 | 45 | 9 |
| Net (losses) gains recognized on debt securities classified as trading that are still held at the end of the period | (20) | 22 | |
| More than 12 months - Fair value | 135 | 423 | |
| More than 12 months - Unrealized losses | (2) | (15) | |
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Asset-backed Securities [Member]
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| Schedule of Marketable Securities [Line Items] | |||
| Less than 12 months - Fair value | 367 | 143 | |
| Less than 12 months - Unrealized losses | (5) | (1) | |
| Marketable Securities [Abstract] | |||
| More than 12 months - Fair value | 24 | 7 | |
| More than 12 months - Unrealized losses | $ 0 | $ 0 | |
| X | ||||||||||
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- Definition
Available For Sale Securities Continuous Unrealized Loss Position 12 Months Or Longer Aggregate Losses Instant No definition available.
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| X | ||||||||||
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- Definition
Available For Sale Securities Continuous Unrealized Loss Position Less Than 12 Months Aggregate Losses Instant No definition available.
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| 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
This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for less than twelve months. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for twelve months or longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Amount of unrealized holding gain (loss) recognized in the income statement for investments in debt and equity securities and other forms of securities that provide ownership interests classified as trading. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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