Consolidated Statements Of Financial Position (Parenthetical) (USD $)	Feb. 29, 2012	Nov. 30, 2011
Consolidated Statements Of Financial Position [Abstract]
Preference stock, par value	$ 1	$ 1
Preference stock, shares authorized	15,000,000	15,000,000
Preference stock, shares outstanding	0	0
Common stock, par value	$ 0.1	$ 0.1
Common stock, shares authorized	135,000,000	135,000,000
Common stock, shares issued	46,600,000	46,100,000
Treasury stock, shares	400,000	400,000