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Shareholders' Equity (Stock Repurchase Program) (Detail) (USD $)
In Millions, except Per Share data, unless otherwise specified |
12 Months Ended | |
|---|---|---|
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Jul. 28, 2012
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Jul. 30, 2011
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| Shareholders' Equity [Abstract] | ||
| Cumulative Shares Repurchased, Beginning balance | 3,478 | 3,127 |
| Repurchase of common stock under the stock repurchase program, Shares Repurchased | 262 | 351 |
| Cumulative Shares Repurchased, Ending balance | 3,740 | 3,478 |
| Cumulative Weighted-Average Price per Share, Beginning balance | $ 20.64 | $ 20.78 |
| Repurchase of common stock under the stock repurchase program, Weighted-Average Price per Share | $ 16.64 | $ 19.36 |
| Cumulative Weighted-Average Price per Share, Ending balance | $ 20.36 | $ 20.64 |
| Cumulative Amount Repurchased, Beginning balance | $ 71,773 | $ 64,982 |
| Repurchase of common stock under the stock repurchase program, Amount Repurchased | 4,360 | 6,791 |
| Cumulative Amount Repurchased, Ending balance | $ 76,133 | $ 71,773 |