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Commitments And Contingencies (Additional Information) (Details) (USD $)
3 Months Ended 9 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended 57 Months Ended 3 Months Ended 9 Months Ended 3 Months Ended
Apr. 26, 2014
Apr. 27, 2013
Apr. 26, 2014
Apr. 27, 2013
Jul. 27, 2013
Apr. 26, 2014
Minimum
Apr. 26, 2014
Maximum
Apr. 26, 2014
Cash compensation and contingent consideration [Member]
Maximum
Apr. 26, 2014
Insieme Networks Inc
Oct. 26, 2013
Insieme Networks Inc
Apr. 28, 2012
Insieme Networks Inc
Apr. 26, 2014
Insieme Networks Inc
Apr. 26, 2014
Insieme Networks Inc
Including compensation that has been expensed through current reporting period end
Maximum
Apr. 26, 2014
Investments In Privately Held Companies
Jul. 27, 2013
Investments In Privately Held Companies
Apr. 26, 2014
VCE
Apr. 27, 2013
VCE
Apr. 26, 2014
VCE
Apr. 27, 2013
VCE
Apr. 26, 2014
VCE
Apr. 26, 2014
Supplier component remediation liability [Member]
Oct. 26, 2013
Supplier component remediation liability [Member]
Apr. 26, 2014
Russia and the Commonwealth of Independent States [Member]
Jan. 25, 2014
XpertUniverse
Fraud by concealment claims
Apr. 27, 2013
XpertUniverse
Fraud by concealment claims
Jan. 25, 2014
XpertUniverse
Maximum
Patents infringement
Apr. 27, 2013
XpertUniverse
Maximum
Patents infringement
Site Contingency [Line Items]                                                      
Inventory purchase commitments $ 4,038,000,000   $ 4,038,000,000   $ 4,033,000,000                                            
Recorded liabilities related to inventory purchase commitments 156,000,000   156,000,000   172,000,000                                            
Commitments and contingencies                  645,000,000         856,000,000 276,000,000 263,000,000           702,000,000 63,000,000          
Initial investment in Insieme                     100,000,000                                
Product cost of sales 3,595,000,000 3,782,000,000 11,665,000,000 11,387,000,000                                 655,000,000            
Ownership percentage of Insieme                   83.00%                                  
Compensation expense related to acquisitions                 52,000,000     363,000,000                              
Cumulative investment in entity                               679,000,000   679,000,000   679,000,000              
Ownership percentage in entity (in percentage)                               35.00%   35.00%   35.00%              
Investments for the period, equity method                                   147,000,000                  
Company's share of VCE's losses (in percentage)                               36.80% 36.80% 36.80% 36.80%                
Cumulative lossess - VCE                               52,000,000 49,000,000 163,000,000 135,000,000 584,000,000              
VCE-Carrying Value                               95,000,000   95,000,000   95,000,000              
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 389,000,000   389,000,000                                                
Brazilian authority claim of import tax evasion by importer, interest portion 1,300,000,000   1,300,000,000                                                
Brazilian authority claim of import tax evasion by importer, penalties portion 1,700,000,000   1,700,000,000                                                
Loss Contingency, Damages Awarded, Value                                                 70,000,000 35,000 35,000
Loss Contingency, Damages Award Vacated, Value                                               $ (70,000,000)      
Percentage of Company's revenue (Percentage)                                             2.00%