Consolidated Balance Sheets (Parenthetical) (USD $) In Millions, except Per Share data, unless otherwise specified	Nov. 30, 2013	Nov. 30, 2012
Statement Of Financial Position [Abstract]
Redeemable common stock, par value	$ 0.10	$ 0.10
Redeemable common stock, issued	0.1	0.4
Redeemable common stock, outstanding	0.1	0.4
Preference stock, par value	$ 1.00	$ 1.00
Preference stock, shares authorized	15.0	15.0
Preference stock, share issued	0	0
Preference stock, share outstanding	0	0
Common stock, par value	$ 0.10	$ 0.10
Common stock, shares authorized	150.0	150.0
Common stock, shares issued	59.9	58.9
Common stock, shares outstanding	59.9	58.9