Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income (loss) attributable to ParkOhio common shareholders before noncontrolling interest	$ 6.8	$ (12.9)	$ (26.0)
Other comprehensive income (loss):
Currency translation	7.7	(19.9)	(10.0)
Pensions and other postretirement benefits, net of tax	10.4	(22.7)	8.9
Total other comprehensive income (loss)	18.1	(42.6)	(1.1)
Total comprehensive income (loss), net of tax	24.9	(55.5)	(27.1)
Comprehensive loss (income) attributable to noncontrolling interest	1.0	(1.3)	1.2
Comprehensive income (loss) attributable to ParkOhio common shareholders	$ 25.9	$ (56.8)	$ (25.9)