v2.4.0.8
Financing Receivables And Guarantees (Schedule Of Financing Receivables Categorized By Internal Credit Risk Rating) (Detail) (USD $)
In Millions, unless otherwise specified
Oct. 26, 2013
Jul. 27, 2013
Oct. 27, 2012
Financing Receivables And Guarantees [Line Items]      
Gross Financing Receivable, Net of Unearned $ 8,375 $ 8,292 $ 7,795
Rating One To Four [Member]
     
Financing Receivables And Guarantees [Line Items]      
Gross Financing Receivable, Net of Unearned 4,468 4,399  
Rating Five To Six [Member]
     
Financing Receivables And Guarantees [Line Items]      
Gross Financing Receivable, Net of Unearned 3,385 3,400  
Rating Seven And Higher [Member]
     
Financing Receivables And Guarantees [Line Items]      
Gross Financing Receivable, Net of Unearned 270 242  
Total Internal Credit Risk Rating [Member]
     
Financing Receivables And Guarantees [Line Items]      
Gross Financing Receivable, Net of Unearned 8,123 8,041  
Residual Value [Member]
     
Financing Receivables And Guarantees [Line Items]      
Gross Financing Receivable, Net of Unearned 252 251  
Lease Receivables
     
Financing Receivables And Guarantees [Line Items]      
Gross Financing Receivable, Net of Unearned 3,549 3,507 3,340
Lease Receivables | Rating One To Four [Member]
     
Financing Receivables And Guarantees [Line Items]      
Gross Financing Receivable, Net of Unearned 1,695 1,681  
Lease Receivables | Rating Five To Six [Member]
     
Financing Receivables And Guarantees [Line Items]      
Gross Financing Receivable, Net of Unearned 1,498 1,482  
Lease Receivables | Rating Seven And Higher [Member]
     
Financing Receivables And Guarantees [Line Items]      
Gross Financing Receivable, Net of Unearned 104 93  
Lease Receivables | Total Internal Credit Risk Rating [Member]
     
Financing Receivables And Guarantees [Line Items]      
Gross Financing Receivable, Net of Unearned 3,297 3,256  
Lease Receivables | Residual Value [Member]
     
Financing Receivables And Guarantees [Line Items]      
Gross Financing Receivable, Net of Unearned 252 251  
Loan Receivables
     
Financing Receivables And Guarantees [Line Items]      
Gross Financing Receivable, Net of Unearned 1,808 1,649 1,816
Loan Receivables | Rating One To Four [Member]
     
Financing Receivables And Guarantees [Line Items]      
Gross Financing Receivable, Net of Unearned 981 842  
Loan Receivables | Rating Five To Six [Member]
     
Financing Receivables And Guarantees [Line Items]      
Gross Financing Receivable, Net of Unearned 777 777  
Loan Receivables | Rating Seven And Higher [Member]
     
Financing Receivables And Guarantees [Line Items]      
Gross Financing Receivable, Net of Unearned 50 30  
Loan Receivables | Total Internal Credit Risk Rating [Member]
     
Financing Receivables And Guarantees [Line Items]      
Gross Financing Receivable, Net of Unearned 1,808 1,649  
Financed Service Contracts And Other
     
Financing Receivables And Guarantees [Line Items]      
Gross Financing Receivable, Net of Unearned 3,018 3,136 2,639
Financed Service Contracts And Other | Rating One To Four [Member]
     
Financing Receivables And Guarantees [Line Items]      
Gross Financing Receivable, Net of Unearned 1,792 1,876  
Financed Service Contracts And Other | Rating Five To Six [Member]
     
Financing Receivables And Guarantees [Line Items]      
Gross Financing Receivable, Net of Unearned 1,110 1,141  
Financed Service Contracts And Other | Rating Seven And Higher [Member]
     
Financing Receivables And Guarantees [Line Items]      
Gross Financing Receivable, Net of Unearned 116 119  
Financed Service Contracts And Other | Total Internal Credit Risk Rating [Member]
     
Financing Receivables And Guarantees [Line Items]      
Gross Financing Receivable, Net of Unearned $ 3,018 $ 3,136