Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - $ / shares	May. 31, 2015	Nov. 30, 2014
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 .1 million shares as of May 31, 2015 and .1 million shares as of November 30, 2014 (in shares)	100,000	100,000
Redeemable common stock, shares outstanding, less than .1 million shares as of May 31, 2015 and .1 million shares as of November 30, 2014 (in shares)	100,000	100,000
Preference stock, par value (in USD per share)	$ 1.00	$ 1.00
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)	$ 0.10	$ 0.10
Common stock, shares authorized (in shares)	150,000,000	150,000,000
Common stock, shares issued (in shares)	61,300,000	56,900,000
Common stock, shares outstanding (in shares)	61,300,000	56,900,000
Treasury stock, shares (in shares)	3,500,000	3,500,000