Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Statement of Comprehensive Income [Abstract]
Net earnings (loss)	$ 12.3	$ 6.7	$ (2.2)	$ 29.4
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	23.4	1.7	63.1	(3.3)
Unrecognized post-retirement plan (loss) gain	(0.1)	0.0	(0.4)	0.1
Unrealized (loss) gain on hedging activities	0.0	(0.4)	(1.6)	0.6
Total other comprehensive income (loss), net of tax	23.3	1.3	61.1	(2.6)
Comprehensive loss attributable to Milacron Holdings Corp.	$ 35.6	$ 8.0	$ 58.9	$ 26.8