Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Aug. 31, 2014	Aug. 31, 2013	Aug. 31, 2014	Aug. 31, 2013
Income Statement [Abstract]
Net sales	$ 419.5	$ 367.5	$ 1,152.3	$ 897.8
Operating costs and expenses:
Cost of sales (exclusive of items shown separately below)	374.2	326.7	1,027.2	798.6
Selling, general and administrative	9.7	14.1	28.1	39.9
Depreciation and amortization	15.7	15.2	45.9	26.6
Other expense, net:
Loss on debt repurchased	9.8	0	60.6	0
Other	6.5	8.1	11.6	24.5
Total operating costs and expenses	415.9	364.1	1,173.4	889.6
Operating income (loss)	3.6	3.4	(21.1)	8.2
Non-operating (income) expense:
Interest income	0	0	0	(0.2)
Interest expense	14.0	12.4	39.0	36.2
Total non-operating expense, net	14.0	12.4	39.0	36.0
(Loss) income from continuing operations before income taxes	(10.4)	(9.0)	(60.1)	(27.8)
Income tax (benefit) provision	(0.7)	(206.6)	1.1	(199.6)
(Loss) income from continuing operations	(9.7)	197.6	(61.2)	171.8
Income (loss) from discontinued operations, net of income taxes	0.2	(0.2)	(0.6)	(0.2)
Net (loss) income	$ (9.5)	$ 197.4	$ (61.8)	$ 171.6
Basic
(Loss) income per share from continuing operations (in USD per share)	$ (0.17)	$ 3.25	$ (1.05)	$ 2.83
Loss per share from discontinued operations, net of income taxes (in USD per share)	$ 0.00	$ 0.00	$ (0.01)	$ 0.00
Net (loss) income per share (in USD per share)	$ (0.17)	$ 3.25	$ (1.06)	$ 2.83
Diluted
(Loss) income per share from continuing operations (in USD per share)	$ (0.17)	$ 2.39	$ (1.05)	$ 2.13
Loss per share from discontinued operations, net of income taxes (in USD per share)	$ 0.00	$ 0.00	$ (0.01)	$ 0.00
Net (loss) income per share (in USD per share)	$ (0.17)	$ 2.39	$ (1.06)	$ 2.13
Weighted average shares of common stock outstanding, basic (in shares)	56.9	59.7	58.2	59.5
Weighted average shares of common stock outstanding, diluted (in shares)	56.9	82.1	58.2	81.9