Operating Results of Segments and Reconciliations to Loss Before Income taxes (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Segment Reporting Information [Line Items]
Revenues	$ 350.2	$ 320.9	$ 687.3	$ 630.3
Segment Adjusted EBITDA	17.2	20.9	29.5	39.2
Unrealized gains (losses) on derivative financial instruments	(0.1)	1.9	(0.4)	1.5
Segment depreciation and amortization			(21.6)	(25.3)
Selling, general and administrative expenses	(12.4)	(14.6)	(26.8)	(30.0)
Other, net	(0.7)	(0.2)	(1.6)	(1.6)
Operating profit	3.8	8.1	0.2	6.0
Interest expense, net	(9.6)	(9.1)	(20.6)	(18.3)
Change in fair value of common stock warrant liability	(0.2)	1.3	2.3	0.7
Foreign exchange gains (losses) on intercompany loans	1.4	(1.6)	2.2	1.0
Income (loss) from equity method investment	(0.5)	0.0	0.6	0.0
Other nonoperating income (expense), net	0.0	0.2	(0.3)	0.2
Income tax expense	(1.1)	(0.2)	(1.9)	(0.9)
Earnings from discontinued operations, net of income taxes	0.0	0.1	0.0	0.1
Net loss	(6.2)	(1.2)	(17.5)	(11.2)
Operating Segments
Segment Reporting Information [Line Items]
Segment Adjusted EBITDA	17.2	20.9	29.5	39.2
Unrealized gains (losses) on derivative financial instruments	(0.1)	1.9	(0.4)	1.5
Segment depreciation and amortization	(10.1)	(10.6)	(21.6)	(25.3)
Amortization of inventories and supplies purchase accounting adjustments	0.0	(0.3)	0.0	(0.9)
RANA | Operating Segments
Segment Reporting Information [Line Items]
Revenues	234.4	212.4	460.0	413.2
Segment Adjusted EBITDA	8.7	14.3	15.0	27.5
RAEU | Operating Segments
Segment Reporting Information [Line Items]
Revenues	115.8	108.4	227.3	217.0
Segment Adjusted EBITDA	8.5	6.6	14.5	11.7
Corporate and Other
Segment Reporting Information [Line Items]
Revenues	0.0	0.1	0.0	0.1
Segment Adjusted EBITDA	0.0	0.0	0.0	0.0
Selling, general and administrative expenses	$ (2.5)	$ (3.6)	$ (5.7)	$ (6.9)