UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Income Statement [Abstract]
Revenues	$ 314.9	$ 338.6	$ 945.2	$ 845.1
Cost of sales	298.3	313.2	889.7	793.5
Gross profit	16.6	25.4	55.5	51.6
Selling, general and administrative expenses	18.1	16.5	48.1	39.8
Losses on derivative financial instruments, net	0.8	1.0	0.5	3.0
Amortization of intangibles	0.5	0.2	1.8	0.6
Other operating expense, net	0.7	0.3	2.6	1.2
Operating profit (loss)	(3.5)	7.4	2.5	7.0
Nonoperating expense (income):
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, net	0.5	(0.9)	0.3	(0.4)
Total nonoperating expense, net	7.8	4.9	24.2	43.2
Earnings (loss) from continuing operations before income taxes	(11.3)	2.5	(21.7)	(36.2)
Income tax expense (benefit)	(0.5)	0.5	0.4	(6.7)
Earnings (loss) from continuing operations	(10.8)	2.0	(22.1)	(29.5)
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)
Earnings from continuing operations attributable to noncontrolling interest	0.1	0.1	0.5	0.3
Net earnings (loss) attributable to Real Industry, Inc.	(10.9)	1.2	(22.5)	(3.3)
EARNINGS (LOSS) PER SHARE
Net earnings (loss) attributable to Real Industry, Inc.	(10.9)	1.2	(22.5)	(3.3)
Dividends on Redeemable Preferred Stock, in-kind	(0.5)	(0.5)	(1.4)	(1.0)
Accretion of fair value adjustment to Redeemable Preferred Stock	(0.2)	(0.2)	(0.8)	(0.6)
Net earnings (loss) available to common stockholders	$ (11.6)	$ 0.5	$ (24.7)	$ (4.9)
Basic earnings (loss) per share:
Continuing operations	$ (0.40)	$ 0.04	$ (0.85)	$ (1.21)
Discontinued operations	0	(0.02)	0	1.02
Basic earnings (loss) per share	(0.40)	0.02	(0.85)	(0.19)
Diluted earnings (loss) per share:
Continuing operations	(0.40)	0.04	(0.85)	(1.21)
Discontinued operations	0	(0.02)	0	1.02
Diluted earnings (loss) per share	$ (0.40)	$ 0.02	$ (0.85)	$ (0.19)