Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $)	Aug. 31, 2014	Nov. 30, 2013
Statement of Financial Position [Abstract]
Redeemable common stock, par value (in USD per share)	$ 0.10	$ 0.10
Redeemable common stock, shares issued, less than (in shares)	100,000	100,000
Redeemable common stock, shares outstanding, less than (in shares)	100,000	100,000
Preference stock, par value (in USD per share)	$ 1	$ 1
Preference stock, shares authorized (in shares)	15,000,000	15,000,000
Preference stock, shares issued (in shares)	0	0
Preference stock, shares outstanding (in shares)	0	0
Common stock, par value (in USD per share)	$ 0.1	$ 0.1
Common stock, shares authorized (in shares)	150,000,000	150,000,000
Common stock, shares issued (in shares)	56,900,000	59,900,000
Common stock, shares outstanding (in shares)	56,900,000	59,900,000
Treasury stock, shares (in shares)	3,500,000	0