v2.4.0.8

Investments - Additional Information (Detail) (USD $) | 3 Months Ended |
--- | --- | ---
Oct. 26, 2013 | Oct. 27, 2012 | Jul. 27, 2013
Schedule of Available-for-sale Securities [Line Items] |  |  |
Average Balance Of Securities Lending | $ 600,000,000 | $ 800,000,000 |
Minimum market value percentage of loaned securities, required collateral | 102.00% |  |
Secured lending transactions outstanding | 0 |  | 0
Fixed Income Securities [Member] |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net, Available-for-sale Securities | 0 |  |
Equity Securities [Member] |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities | $ 0 |  |

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- Definition Average balance of securities lending. + References No definition available. + Details
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- Definition Fair value of securities received as collateral that can be resold or repledged percentage. + References No definition available. + Details
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- Definition Secured Lending Transactions Outstanding + References No definition available. + Details
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- Definition The amount by which the fair value of an investment in debt and equity securities categorized as Available-for-sale is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563 + Details
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- Definition The amount of other than temporary impairment losses on investments in debt and equity securities categorized as Available-for-sale which have been recognized in earnings during the period. Such impairment losses consist of other than temporary impairments (OTTI) on equity securities, credit losses on investments in debt securities, and when the entity intends to sell an impaired debt security or it is more likely than not that the entity will be required to sell the impaired debt security before recovery of its amortized cost basis. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563 + Details
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