UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Statement Of Income And Comprehensive Income [Abstract]
Net loss	$ (10.8)	$ (0.5)	$ (4.3)	$ (0.4)
Other comprehensive loss:
Current period currency translation adjustments	(1.2)		(0.9)
Comprehensive loss	(12.0)	(0.5)	(5.2)	(0.4)
Comprehensive income attributable to noncontrolling interest	0.1		0.2
Comprehensive loss attributable to Real Industry, Inc.	$ (12.1)	$ (0.5)	$ (5.4)	$ (0.4)