Consolidated Statements of Financial Position (Parenthetical) (USD $)	Feb. 28, 2013	Nov. 30, 2012
Statement of Financial Position [Abstract]
Preference stock, par value	$ 1	$ 1
Preference stock, shares authorized	15,000,000	15,000,000
Preference stock, outstanding	0	0
Common stock, par value	$ 0.10	$ 0.10
Common stock, shares authorized	135,000,000	135,000,000
Common stock, shares issued	47,700,000	47,500,000
Treasury stock, shares	600,000	600,000