Income Per Share Weighted average shares outstanding (Details) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	May 31, 2014	May 31, 2013	May 31, 2014	May 31, 2013
Weighted Average Shares Outstanding [Abstract]
Weighted-average common shares outstanding	46.3	46.0	46.3	46.0
Weighted-average participating shares outstanding	0	0.2	0	0.2
Weighted Average Number of Shares Outstanding, Including Participating Shares, Basic	46.3	46.2	46.3	46.2
Weighted-average common shares outstanding - assuming dilution	47.0	46.7	46.9	46.7
Options to purchase common stock and restricted shares that were excluded from computation of diluted earnings per share because they were anti-dilutive			0	0