Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 39.7	$ 55.2	$ 29.5
Other comprehensive income (loss):
Currency translation	(1.1)	(9.7)	19.2
Pensions and other postretirement benefits, net of tax	5.0	(13.3)	5.6
Total other comprehensive income (loss)	3.9	(23.0)	24.8
Total comprehensive income, net of tax	43.6	32.2	54.3
Comprehensive income attributable to noncontrolling interest	(1.1)	(1.6)	(0.9)
Comprehensive income attributable to ParkOhio common shareholders	$ 42.5	$ 30.6	$ 53.4