Operating Results of Segments and Reconciliations to Loss Before Income taxes (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Segment Reporting Information [Line Items]
Revenues	$ 314.9	$ 338.6	$ 945.2	$ 845.1
Unrealized gains (losses) on derivative financial instruments	(0.6)	0.5	0.9	(0.8)
Segment depreciation and amortization			(36.6)	(24.3)
Amortization of inventories and supplies purchase accounting adjustments			(0.9)	(8.5)
Selling, general and administrative expenses	(18.1)	(16.5)	(48.1)	(39.8)
Other, net	(1.0)	(1.1)	(2.6)	(2.2)
Operating profit (loss)	(3.5)	7.4	2.5	7.0
Interest expense, net	(9.2)	(9.2)	(27.5)	(26.6)
Change in fair value of common stock warrant liability	1.9	3.4	2.6	(2.2)
Acquisition-related costs and expenses	0.0	0.0	0.0	(14.8)
Foreign exchange gains on intercompany loans	0.0	0.0	1.0	0.0
Other nonoperating income, net	(0.5)	0.9	(0.3)	0.4
Income tax benefit (expense)	0.5	(0.5)	(0.4)	6.7
Earnings (loss) from discontinued operations, net of income taxes	0.0	(0.7)	0.1	26.5
Net earnings (loss)	(10.8)	1.3	(22.0)	(3.0)	$ (6.8)
Operating Segments
Segment Reporting Information [Line Items]
Segment Adjusted EBITDA	16.9	22.8	56.1	53.2
Unrealized gains (losses) on derivative financial instruments	(0.6)	0.5	0.9	(0.8)
Segment depreciation and amortization	(11.3)	(10.3)	(36.6)	(24.2)
Amortization of inventories and supplies purchase accounting adjustments	0.0	(1.3)	(0.9)	(8.5)
RANA | Operating Segments
Segment Reporting Information [Line Items]
Revenues	200.5	205.2	613.7	521.7
Segment Adjusted EBITDA	9.0	15.4	36.5	36.3
RAEU | Operating Segments
Segment Reporting Information [Line Items]
Revenues	114.4	133.4	331.5	323.3
Segment Adjusted EBITDA	7.9	7.4	19.6	16.9
Corporate and Other
Segment Reporting Information [Line Items]
Revenues	0.0	0.0	0.0	0.1
Segment Adjusted EBITDA			0.0	0.0
Selling, general and administrative expenses	$ (7.5)	$ (3.2)	$ (14.4)	$ (10.5)