Consolidated Balance Sheets (Parenthetical) (USD $)	Aug. 31, 2012	Feb. 29, 2012
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	228,444,532	227,118,666
Common stock, shares outstanding	228,444,532	227,118,666