Consolidated Statements of Operations (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Nov. 30, 2013	Nov. 30, 2012	Nov. 30, 2011
Income Statement [Abstract]
Net sales	$ 1,383.1	$ 994.9	$ 918.1
Operating costs and expenses:
Cost of sales (exclusive of items shown separately below)	1,229.6	869.6	799.3
Selling, general and administrative	53.6	41.9	40.9
Depreciation and amortization	43.8	22.3	24.6
Other expense, net	33.8	26.2	14.5
Total operating costs and expenses	1,360.8	960.0	879.3
Operating income	22.3	34.9	38.8
Non-operating (income) expense
Interest expense	48.7	22.3	30.8
Interest income	(0.2)	(0.6)	(1.0)
Total non-operating expense, net	48.5	21.7	29.8
(Loss) income from continuing operations before income taxes	(26.2)	13.2	9.0
Income tax (benefit) provision	(193.9)	18.9	6.1
Income (loss) from continuing operations	167.7	(5.7)	2.9
Income from discontinued operations, net of income taxes	0.2	3.1
Net income (loss)	$ 167.9	$ (2.6)	$ 2.9
Basic:
Income (loss) per share from continuing operations	$ 2.76	$ (0.09)	$ 0.05
Income from discontinued operations, net of income taxes		$ 0.05
Net income (loss) per share	$ 2.76	$ (0.04)	$ 0.05
Diluted:
Income (loss) per share from continuing operations	$ 2.11	$ (0.09)	$ 0.05
Income from discontinued operations, net of income taxes		$ 0.05
Net income (loss) per share	$ 2.11	$ (0.04)	$ 0.05
Weighted average shares of common stock outstanding	59.6	59.0	58.7
Weighted average shares of common stock outstanding, assuming dilution	81.9	59.0	58.7