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Equity and Comprehensive Income - Additional Information - Dividends (Detail) (USD $)
In Millions, except Per Share data, unless otherwise specified |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
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Feb. 15, 2015
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Feb. 16, 2014
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Feb. 15, 2015
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Feb. 16, 2014
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| Class of Stock [Line Items] | ||||
| Dividends declared | $ 5.355 | $ 0.31 | $ 5.71 | $ 0.62 |
| Payment of dividends | $ 2,358 | $ 156 | $ 137 | |
| Dividend Declared [Member] | ||||
| Class of Stock [Line Items] | ||||
| Dividends declared | $ 0.355 | $ 0.31 | ||
| Special Dividend [Member] | ||||
| Class of Stock [Line Items] | ||||
| Dividends declared | $ 5 | |||