v2.4.0.8

Derivative Instruments (Derivatives Recorded At Fair Value) (Details) (USD $) In Millions, unless otherwise specified | Oct. 26, 2013 | Jul. 27, 2013
--- | --- | ---
Derivative [Line Items] |  |
Derivative assets | $ 224 | $ 182
Derivative liabilities | 145 | 171
Designated as Hedging Instrument [Member] |  |
Derivative [Line Items] |  |
Derivative assets | 221 | 180
Derivative liabilities | 132 | 164
Designated as Hedging Instrument [Member] | Foreign Exchange Contract | Other Current Assets [Member] |  |
Derivative [Line Items] |  |
Derivative assets | 57 | 33
Designated as Hedging Instrument [Member] | Foreign Exchange Contract | Other Current Liabilities [Member] |  |
Derivative [Line Items] |  |
Derivative liabilities | 10 | 7
Designated as Hedging Instrument [Member] | Interest Rate Derivatives [Member] | Other Noncurrent Assets [Member] |  |
Derivative [Line Items] |  |
Derivative assets | 164 | 147
Designated as Hedging Instrument [Member] | Interest Rate Derivatives [Member] | Other Noncurrent Liabilities [Member] |  |
Derivative [Line Items] |  |
Derivative liabilities | 0 | 2
Designated as Hedging Instrument [Member] | Equity Derivatives [Member] | Other Current Assets [Member] |  |
Derivative [Line Items] |  |
Derivative assets | 0 | 0
Designated as Hedging Instrument [Member] | Equity Derivatives [Member] | Other Current Liabilities [Member] |  |
Derivative [Line Items] |  |
Derivative liabilities | 122 | 155
Derivatives Not Designated As Hedging Instruments [Member] | Foreign Exchange Contract | Other Current Assets [Member] |  |
Derivative [Line Items] |  |
Derivative assets | 3 | 2
Derivatives Not Designated As Hedging Instruments [Member] | Foreign Exchange Contract | Other Current Liabilities [Member] |  |
Derivative [Line Items] |  |
Derivative liabilities | $ 13 | $ 7

X
- Definition Fair value before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=28370219&loc=SL20226000-175313 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=20225523&loc=SL20225862-175312 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (a),(c) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624163-113959 + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | debit
Period Type: | instant

X
- Definition Fair value before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=28370219&loc=SL20226000-175313 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=20225523&loc=SL20225862-175312 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (a),(c) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624163-113959 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration