|
Derivative Instruments (Effect Of Derivative Instruments Designated As Cash Flow Hedges On Other Comprehensive And Consolidated Statements Of Operations Summary) (Details) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | |
|---|---|---|
|
Oct. 27, 2012
|
Oct. 29, 2011
|
|
|
Cash Flow Hedging [Member]
|
||
| Derivative [Line Items] | ||
| Gains (losses) recognized in OCI on derivatives (effective portion) | $ 66 | $ (50) |
| Gains (losses) reclassified from AOCI into income (effective portion) | (5) | 0 |
|
Cash Flow Hedging [Member] | Foreign Currency Derivatives-Cash Flow Hedges [Member]
|
||
| Derivative [Line Items] | ||
| Gains (losses) recognized in OCI on derivatives (effective portion) | 66 | (50) |
|
Cash Flow Hedging [Member] | Operating Expenses [Member] | Foreign Currency Derivatives-Cash Flow Hedges [Member]
|
||
| Derivative [Line Items] | ||
| Gains (losses) reclassified from AOCI into income (effective portion) | (4) | 0 |
|
Cash Flow Hedging [Member] | Cost Of Sales-Service [Member] | Foreign Currency Derivatives-Cash Flow Hedges [Member]
|
||
| Derivative [Line Items] | ||
| Gains (losses) reclassified from AOCI into income (effective portion) | (1) | 0 |
|
Net Investment Hedging [Member]
|
||
| Derivative [Line Items] | ||
| Gains (losses) recognized in OCI on derivatives (effective portion) | (24) | (4) |
|
Net Investment Hedging [Member] | Other income (loss), net [Member]
|
||
| Derivative [Line Items] | ||
| Gains (losses) reclassified from AOCI into income (effective portion) | $ 0 | $ 0 |