Commitments And Contingencies (Additional Information) (Details) (USD $)			6 Months Ended		3 Months Ended		6 Months Ended			3 Months Ended			6 Months Ended				3 Months Ended		6 Months Ended		54 Months Ended		3 Months Ended
	Jan. 25, 2014	Jul. 27, 2013	Jan. 25, 2014 Minimum	Jan. 25, 2014 Maximum	Jan. 25, 2014 Acquisition	Jan. 26, 2013 Acquisition	Jan. 25, 2014 Acquisition	Jan. 26, 2013 Acquisition	Jan. 25, 2014 Cash compensation and contingent consideration [Member] Maximum	Jan. 25, 2014 Insieme Networks Inc	Oct. 26, 2013 Insieme Networks Inc	Apr. 28, 2012 Insieme Networks Inc	Jan. 25, 2014 Insieme Networks Inc	Jan. 25, 2014 Insieme Networks Inc Including compensation that has been expensed through current reporting period end Maximum	Jan. 25, 2014 Investments In Privately Held Companies	Jul. 27, 2013 Investments In Privately Held Companies	Jan. 25, 2014 VCE	Jan. 26, 2013 VCE	Jan. 25, 2014 VCE	Jan. 26, 2013 VCE	Jan. 25, 2014 VCE	Jan. 25, 2014 Supplier component remediation liability [Member] Cost Of Sales Product	Jan. 25, 2014 XpertUniverse Fraud by concealment claims	Jan. 25, 2014 XpertUniverse Maximum Patents infringement
Site Contingency [Line Items]
Inventory purchase commitments	$ 3,946,000,000	$ 4,033,000,000
Recorded liabilities related to inventory purchase commitments	173,000,000	172,000,000
Compensation Expense					106,000,000	23,000,000	410,000,000	35,000,000		54,000,000			311,000,000
Initial investment in Insieme												100,000,000
Ownership percentage of Insieme											83.00%
Acquisition close date (Insieme)										Jan. 25, 2014
Commitments and contingencies									751,000,000					863,000,000	279,000,000	263,000,000						655,000,000
Cumulative investment in entity																	669,000,000		669,000,000		669,000,000
Ownership percentage in entity (in percentage)																	35.00%		35.00%		35.00%
Investments for the period, equity method																	83,000,000		147,000,000
Company's share of VCE's losses (in percentage)																	36.80%	36.80%	36.80%	36.80%
Cumulative lossess - VCE																	58,000,000	44,000,000	111,000,000	86,000,000	533,000,000
VCE-Carrying Value																	136,000,000		136,000,000		136,000,000
Warranty Period for Products, low range (in days)			90 days
Warranty Period For Products, high range (in years)				5 years
Brazilian authority claim of import tax evasion by importer, tax portion	360,000,000
Brazilian authority claim of import tax evasion by importer, interest portion	1,100,000,000
Brazilian authority claim of import tax evasion by importer, penalties portion	1,600,000,000
Loss Contingency, Damages Awarded, Value																							70,000,000	35,000
Loss Contingency, Damages Award Vacated, Value																							$ (70,000,000)