Consolidated Balance Sheets (Parenthetical) (USD $)	Nov. 30, 2013	Feb. 28, 2013
Consolidated Balance Sheets [Abstract]
Common stock, par value	$ 0.50	$ 0.50
Common stock, shares authorized	350,000,000	350,000,000
Common stock, shares issued	223,228,360	225,906,108
Common stock, shares outstanding	223,228,360	225,906,108