Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 5.2	$ 12.4	$ (10.5)	$ 32.0
Other comprehensive income (loss), net of tax:
Currency translation	12.6	(9.1)	(1.1)	(10.9)
Pension and other postretirement benefits	0.3	0.5	1.2	6.2
Total other comprehensive income (loss)	12.9	(8.6)	0.1	(4.7)
Total comprehensive income (loss), net of tax	18.1	3.8	(10.4)	27.3
Comprehensive loss (income) attributable to noncontrolling interests	0.1	(0.2)	0.4	(1.0)
Comprehensive income (loss) attributable to Park-Ohio Holdings Corp. common shareholders	$ 18.2	$ 3.6	$ (10.0)	$ 26.3