|
Retirement Benefit Plans (Defined Contribution Plans) (Details) (USD $)
In Millions |
3 Months Ended | |
|---|---|---|
|
Apr. 30, 2011
|
May 01, 2010
|
|
| Retirement Benefit Plans | Â | Â |
| Defined contribution plan, total expense | $ 16 | $ 14 |