|
Income Taxes (Details) (USD $)
In Millions |
3 Months Ended | |
|---|---|---|
|
Apr. 30, 2011
|
Jan. 29, 2011
|
|
| Unrecognized tax benefits | $ 145 | $ 162 |
| Unrecognized Tax Benefits, Decreases Resulting from Settlements with Taxing Authorities | 20 | Â |
| Additions for tax positions of prior years | 3 | Â |
| Amount of unrecognized tax benefits that would impact effective tax rate if recognized | 63 | Â |
| Benefit of federal tax deduction of state taxes | 22 | Â |
| Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Decrease to Unrecorded Benefit | 41 | Â |
| Accrued Interest for Unrecognized Tax Benefits | 4 | 3 |
|
Potential Impact to Effective Tax Rate Next 12 Months [Member]
|
 |  |
| Amount of unrecognized tax benefits that would impact effective tax rate if recognized | $ 1 | Â |