Commitments and Contingencies (Schedule of Financing Guarantees Outstanding) (Details) - USD ($) $ in Millions |
Oct. 29, 2016 |
Jul. 30, 2016 |
|---|---|---|
| Loss Contingencies [Line Items] | ||
| Maximum potential future payments relating to financing guarantees: | $ 336 | $ 377 |
| Deferred revenue associated with financing guarantees: | (147) | (161) |
| Maximum potential future payments relating to financing guarantees, net of associated deferred revenue | 189 | 216 |
| Channel partner | ||
| Loss Contingencies [Line Items] | ||
| Maximum potential future payments relating to financing guarantees: | 248 | 281 |
| Deferred revenue associated with financing guarantees: | (77) | (85) |
| End user | ||
| Loss Contingencies [Line Items] | ||
| Maximum potential future payments relating to financing guarantees: | 88 | 96 |
| Deferred revenue associated with financing guarantees: | $ (70) | $ (76) |