CONSOLIDATED BALANCE SHEETS (Parentheticals) (USD $) In Millions, except Per Share data, unless otherwise specified	Jan. 31, 2013	Jan. 31, 2012
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	750	750
Common stock, shares outstanding	223.6	225.9
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	2.0	2.0
Preferred Stock, Shares Issued	0	0
Preferred Stock, Shares Outstanding	0	0