|
CONSOLIDATED BALANCE SHEETS (Parentheticals) (USD $)
|
Jan. 31, 2014
|
Jan. 31, 2013
|
|---|---|---|
| Statement of Financial Position [Abstract] | ||
| Preferred stock, par value | $ 0.01 | $ 0.01 |
| Preferred stock, shares authorized | 2,000,000 | 2,000,000 |
| Preferred stock, shares issued | 0 | 0 |
| Preferred stock, shares outstanding | 0 | 0 |
| Common stock, par value | $ 0.01 | $ 0.01 |
| Common stock, shares authorized | 750,000,000.0 | 750,000,000.0 |
| Common stock, shares outstanding | 226,700,000 | 223,600,000 |