Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Feb. 29, 2012	Feb. 28, 2011
Condensed Consolidated Statements of Operations [Abstract]
Net sales	$ 201.9	$ 209.8
Operating costs and expenses:
Cost of sales (exclusive of items shown separately below)	173.9	180.6
Selling, general and administrative	10.3	10.3
Depreciation and amortization	5.3	5.7
Other expense, net	1.9	1.2
Total operating costs and expenses	191.4	197.8
Operating income	10.5	12.0
Non-operating (income) and expense:
Interest income	(0.2)	(0.3)
Interest expense	6.0	7.8
Total non-operating expense, net	5.8	7.5
Income from continuing operations before income taxes	4.7	4.5
Income tax provision	2.3	2.6
Income from continuing operations	2.4	1.9
Loss from discontinued operations, net of income taxes		(0.7)
Net income	$ 2.4	$ 1.2
Basic and diluted:
Income per share from continuing operations	$ 0.04	$ 0.03
Loss per share from discontinued operations, net of income taxes		$ (0.01)
Net income per share	$ 0.04	$ 0.02
Weighted average shares of common stock outstanding	58.8	58.6
Weighted average shares of common stock outstanding, assuming dilution	58.9	58.6