Borrowings (Short-Term Debt) (Detail) (USD $) In Millions, unless otherwise specified	Apr. 26, 2014	Jul. 27, 2013
Short-term Debt [Line Items]
Debt, Current	$ 508	$ 3,283
Senior Notes
Short-term Debt [Line Items]
Debt, Current	500	3,273
Effective Interest Rate (Percentage)	3.11%	0.63%
Other notes and borrowings
Short-term Debt [Line Items]
Debt, Current	$ 8	$ 10
Effective Interest Rate (Percentage)	2.60%	2.52%

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

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

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