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Share Repurchase (Details) (USD $)
Share data in Millions, except Per Share data |
1 Months Ended | 3 Months Ended | 12 Months Ended | |
|---|---|---|---|---|
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Nov. 30, 2007
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Apr. 30, 2011
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May 01, 2010
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Jan. 29, 2011
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| Share Repurchase Information | ||||
| Amount approved by board of directors for share repurchase program | $ 10,000,000,000 | |||
| Total Number of Shares Purchased | 15.4 | 7.5 | ||
| Repurchase of stock, average price per share (in dollars per share) | $ 53.32 | $ 52.27 | ||
| Total Investment | 819,000,000 | 394,000,000 | ||
| Repurchase of stock | 819,000,000 | 2,514,000,000 | ||
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Cash investment
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| Share Repurchase Information | ||||
| Repurchase of stock | 7,000,000 | 15,000,000 | ||
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Prepaid forward contracts market value
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| Share Repurchase Information | ||||
| Stock repurchased, delivered upon settlement of prepaid forward contracts | $ 7,000,000 | $ 16,000,000 | ||