Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Statement of Comprehensive Income [Abstract]
Net earnings (loss)	$ 14.9	$ 10.1	$ 20.8	$ (14.5)
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	(51.6)	20.9	(25.0)	39.7
Unrecognized post-retirement plan gain (loss)	0.5	(0.2)	0.5	(0.3)
Unrealized gain (loss) on hedging activities	1.3	(1.7)	5.7	(1.6)
Total other comprehensive (loss) income, net of tax	(49.8)	19.0	(18.8)	37.8
Comprehensive loss attributable to Milacron Holdings Corp.	$ (34.9)	$ 29.1	$ 2.0	$ 23.3