Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Millions, $ in Millions	1 Months Ended	3 Months Ended
	Dec. 31, 2015	Mar. 31, 2016	Feb. 28, 2015
Income Statement [Abstract]
Net sales	$ 96.3	$ 356.9	$ 323.0
Operating costs and expenses:
Cost of sales (exclusive of items shown separately below)	75.4	309.7	285.4
Selling, general and administrative	2.8	11.6	15.6
Depreciation and amortization	5.1	15.1	16.3
Other expense, net:
Loss on debt repurchased	0.0	0.3	0.2
Other	0.2	0.6	1.5
Total operating costs and expenses	83.5	337.3	319.0
Operating income	12.8	19.6	4.0
Non-operating (income) expense:
Interest income	0.0	(0.2)	(0.1)
Interest expense	3.8	11.1	13.4
Total non-operating expense, net	3.8	10.9	13.3
(Loss) income from continuing operations before income taxes	9.0	8.7	(9.3)
Income tax provision (benefit)	2.0	3.5	(5.8)
(Loss) income from continuing operations	7.0	5.2	(3.5)
(Loss) income from discontinued operations, net of income taxes	0.0	(0.1)	0.2
Net income	$ 7.0	$ 5.1	$ (3.3)
Basic
(Loss) income per share from continuing operations (in USD per share)	$ 0.11	$ 0.08	$ (0.06)
Income (loss) per share from discontinued operations, net of income taxes (in USD per share)	0.00	0.00	0.00
Net income (loss) (in USD per share)	0.11	0.08	(0.06)
Diluted
Income (loss) from continuing operations (in USD per share)	0.10	0.08	(0.06)
(Loss) income from discontinued operations, net of income taxes (in USD per share)	0.00	0.00	0.00
Net (loss) income (in USD per share)	$ 0.10	$ 0.08	$ (0.06)
Weighted average shares of common stock outstanding, basic (in shares)	62.9	63.0	58.9
Weighted average shares of common stock outstanding, diluted (in shares)	72.5	63.0	58.9