v2.4.1.9

Borrowings (Schedule Of Short-Term Debt) (Details) (USD $) In Millions, unless otherwise specified	Apr. 25, 2015	Jul. 26, 2014
Short-term Debt [Line Items]
Amount	$ 4,418us-gaap_DebtCurrent	$ 508us-gaap_DebtCurrent
Current portion of long-term debt
Short-term Debt [Line Items]
Amount	3,914us-gaap_DebtCurrent / us-gaap_ShortTermDebtTypeAxis = us-gaap_SeniorNotesMember	500us-gaap_DebtCurrent / us-gaap_ShortTermDebtTypeAxis = us-gaap_SeniorNotesMember
Effective Rate	2.47%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_ShortTermDebtTypeAxis = us-gaap_SeniorNotesMember	3.11%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_ShortTermDebtTypeAxis = us-gaap_SeniorNotesMember
Commercial Paper [Member]
Short-term Debt [Line Items]
Amount	500us-gaap_DebtCurrent / us-gaap_ShortTermDebtTypeAxis = us-gaap_CommercialPaperMember	0us-gaap_DebtCurrent / us-gaap_ShortTermDebtTypeAxis = us-gaap_CommercialPaperMember
Effective Rate	0.16%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_ShortTermDebtTypeAxis = us-gaap_CommercialPaperMember	0.00%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_ShortTermDebtTypeAxis = us-gaap_CommercialPaperMember
Other short-term debt
Short-term Debt [Line Items]
Amount	$ 4us-gaap_DebtCurrent / us-gaap_ShortTermDebtTypeAxis = us-gaap_ShortTermDebtMember	$ 8us-gaap_DebtCurrent / us-gaap_ShortTermDebtTypeAxis = us-gaap_ShortTermDebtMember
Effective Rate	2.62%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_ShortTermDebtTypeAxis = us-gaap_ShortTermDebtMember	2.67%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_ShortTermDebtTypeAxis = us-gaap_ShortTermDebtMember

X

- Definition

Amount of short-term debt and current maturity of long-term debt and capital lease obligations due within one year or the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19,20)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19

-Article 5

+ Details

Name:	us-gaap_DebtCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(1))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateEffectivePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	us-gaap_ShortTermDebtLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_ShortTermDebtTypeAxis=us-gaap_CommercialPaperMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ShortTermDebtTypeAxis=us-gaap_SeniorNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ShortTermDebtTypeAxis=us-gaap_ShortTermDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: