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Stock-Based Compensation Plans (Summary Of Stock-Based Compensation Expense) (Details) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | |
|---|---|---|
|
Nov. 20, 2011
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Nov. 21, 2010
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
| Total stock-based compensation expense before income taxes | $ 76 | $ 57 |
| Less recognized income tax benefit | (25) | (19) |
| Total stock-based compensation expense, net of income taxes | 51 | 38 |
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Restricted Stock Units [Member]
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||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
| Total stock-based compensation expense before income taxes | 76 | 56 |
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Stock Option [Member]
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
| Total stock-based compensation expense before income taxes | $ 0 | $ 1 |