Derivative Instruments (Schedule Of Notional Amounts Of Derivatives Outstanding) (Details) - USD ($) |
Oct. 29, 2016 |
Jul. 30, 2016 |
|---|---|---|
| Derivative [Line Items] | ||
| Derivatives | $ 15,179,000,000 | $ 15,414,000,000 |
| Derivatives designated as hedging instruments: | Foreign currency derivatives | ||
| Derivative [Line Items] | ||
| Derivatives | 2,385,000,000 | 2,683,000,000 |
| Derivatives designated as hedging instruments: | Interest rate derivatives | ||
| Derivative [Line Items] | ||
| Derivatives | 9,900,000,000 | 9,900,000,000 |
| Derivatives designated as hedging instruments: | Net investment hedging instruments | ||
| Derivative [Line Items] | ||
| Derivatives | 290,000,000 | 298,000,000 |
| Derivatives not designated as hedging instruments: | Foreign currency derivatives | ||
| Derivative [Line Items] | ||
| Derivatives | 2,107,000,000 | 2,057,000,000 |
| Derivatives not designated as hedging instruments: | Total return swaps—deferred compensation | ||
| Derivative [Line Items] | ||
| Derivatives | $ 497,000,000 | $ 476,000,000 |