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Marketable Securities Other-than-temporary Impairments (Details) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | 6 Months Ended | ||
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Mar. 30, 2014
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Mar. 31, 2013
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Mar. 30, 2014
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Mar. 31, 2013
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| Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward] | ||||
| Beginning balance of credit losses | $ 6 | $ 19 | $ 4 | $ 31 |
| Reduction in credit losses related to securities the Company intends to sell | 0 | (6) | 0 | (6) |
| Credit losses recognized on securities not previously impaired | 2 | 0 | 5 | 0 |
| Reductions in credit losses related to securities sold | 0 | (5) | (1) | (17) |
| Ending balance of credit losses | $ 8 | $ 8 | $ 8 | $ 8 |
| X | ||||||||||
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- Definition
This item represents an increase to the cumulative amount of credit losses recognized in earnings for an other than temporary impairment (OTTI) of a debt security held for which no such other than temporary impairment (OTTI) was previously recognized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The cumulative amount of credit losses recognized in earnings related to debt securities held for which a portion of an other than temporary impairment (OTTI) was recognized in other comprehensive income (a component of shareholders' equity). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
This item represents reductions in the amount of cumulative losses recognized in earnings for other than temporary impairments (OTTI) for which a portion of the impairment had been recognized in other comprehensive income (a component of shareholders' equity) due to a change in status of the impaired security because of a change in the entity's intent to either sell the impaired security or it has become more likely than not that the entity will be required to sell the security before recovery of its cost basis. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
This item represents reductions in the cumulative amount of credit losses recognized in earnings for an other than temporary impairment (OTTI) of a debt security because of the sale of impaired securities during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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