|
Retirement Benefit Plans (Defined Contribution Plans) (Details) (USD $)
In Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
|
Jul. 30, 2011
|
Jul. 31, 2010
|
Jul. 30, 2011
|
Jul. 31, 2010
|
|
| Retirement Benefit Plans | Â | Â | Â | Â |
| Defined contribution plan, total expense | $ 16 | $ 12 | $ 32 | $ 26 |