CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Statement [Abstract]
Revenues	$ 1,249.7	$ 1,145.6	$ 2.1
Cost of sales	1,183.0	1,070.7	0.0
Gross profit	66.7	74.9	2.1
Selling, general and administrative expenses	61.0	56.0	10.0
Losses on derivative financial instruments, net	0.2	4.2	0.0
Amortization of identifiable intangible assets	2.4	2.0	0.1
Goodwill impairment	61.8	0.0	0.0
Other operating expense, net	6.0	2.5	0.4
Operating profit (loss)	(64.7)	10.2	(8.4)
Nonoperating expense (income):
Interest expense (income), net	37.3	34.9	(0.1)
Change in fair value of common stock warrant liability	(2.4)	1.5	(3.7)
Acquisition-related costs and expenses	1.0	14.8	3.4
Equity in loss of equity method investments	1.1	0.0	0.0
Foreign exchange losses on intercompany loans	2.4	1.3	0.0
Other, net	(0.3)	(1.5)	0.5
Total nonoperating expense, net	39.1	51.0	0.1
Loss from continuing operations before income taxes	(103.8)	(40.8)	(8.5)
Income tax benefit	(0.6)	(9.1)	(8.4)
Loss from continuing operations	(103.2)	(31.7)	(0.1)
Earnings from discontinued operations, net of income taxes	0.6	24.9	5.5
Net earnings (loss)	(102.6)	(6.8)	5.4
Earnings (loss) from continuing operations attributable to noncontrolling interest	0.3	0.1	(0.1)
Net earnings (loss) attributable to Real Industry, Inc.	(102.9)	(6.9)	5.5
EARNINGS (LOSS) PER SHARE
Net earnings (loss) attributable to Real Industry, Inc.	(102.9)	(6.9)	5.5
Dividends on Redeemable Preferred Stock, in-kind	(2.0)	(1.5)	0.0
Accretion of fair value adjustment to Redeemable Preferred Stock	(1.0)	(0.8)	0.0
Net earnings (loss) available to common stockholders	$ (105.9)	$ (9.2)	$ 5.5
Basic and diluted earnings (loss) per share:
Continuing operations	$ (3.68)	$ (0.35)	$ 0
Discontinued operations	0	0	0.41
Basic and diluted earnings (loss) per share	$ (3.68)	$ (0.35)	$ 0.41