Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 1.3	$ 11.7
Other comprehensive (loss) income, net of tax:
Currency translation	(16.6)	0.7
Pension and other postretirement benefits	0.5	5.3
Total other comprehensive (loss) income	(16.1)	6.0
Total comprehensive (loss) income, net of tax	(14.8)	17.7
Comprehensive loss attributable to noncontrolling interests	(0.1)	(0.5)
Comprehensive (loss) income attributable to Park-Ohio Holdings Corp. common shareholders	$ (14.9)	$ 17.2