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