Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 14.7	$ 10.2	$ 39.9	$ 23.5
Other comprehensive (loss) income, net of tax:
Currency translation	(2.7)	7.5	(8.9)	18.9
Pension and other postretirement benefits	0.1	0.2	1.5	0.6
Total other comprehensive (loss) income	(2.6)	7.7	(7.4)	19.5
Total comprehensive income, net of tax	12.1	17.9	32.5	43.0
Comprehensive income attributable to noncontrolling interests	(0.5)	(0.2)	(1.1)	(0.7)
Comprehensive income attributable to Park-Ohio Holdings Corp. common shareholders	$ 11.6	$ 17.7	$ 31.4	$ 42.3