Share Repurchase (Details) (USD $) Share data in Millions, except Per Share data | 3 Months Ended | 9 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|---|
Oct. 29, 2011 | Oct. 30, 2010 | Oct. 29, 2011 | Oct. 30, 2010 | Jan. 29, 2011 | |
| Share Repurchase Information | |||||
| Amount approved by board of directors for share repurchase program | $ 10,000,000,000 | ||||
| Total Number of Shares Purchased (in shares) | 4.5 | 15.2 | 34.1 | 40.2 | |
| Repurchase of stock, average price per share (in dollars per share) | $ 50.45 | $ 52.29 | $ 50.76 | $ 52.04 | |
| Total Investment | 226,000,000 | 793,000,000 | 1,733,000,000 | 2,093,000,000 | |
| Stock repurchased, delivered upon settlement of prepaid forward contracts (in shares) | 0.5 | 0.5 | 0.8 | 0.8 | |
| Repurchase of stock | 1,733,000,000 | 2,514,000,000 | |||
Cash investment | |||||
| Share Repurchase Information | |||||
| Repurchase of stock | 26,000,000 | 24,000,000 | 40,000,000 | 39,000,000 | |
Prepaid forward contracts market value | |||||
| Share Repurchase Information | |||||
| Stock repurchased, delivered upon settlement of prepaid forward contracts | $ 26,000,000 | $ 26,000,000 | $ 40,000,000 | $ 42,000,000 | |