Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Income Statement [Abstract]
Net sales	$ 435.8	$ 358.5	$ 1,282.8	$ 1,068.1
Cost of sales	385.4	318.4	1,128.9	936.1
Gross profit	50.4	40.1	153.9	132.0
Selling, general and administrative expenses	43.4	45.1	134.2	128.1
Gain on sale of assets	0.0	0.0	(2.9)	0.0
Operating income (loss)	7.0	(5.0)	22.6	3.9
Other components of pension income and other postretirement benefits expense, net	2.7	2.4	8.3	7.3
Interest expense, net	(9.6)	(7.6)	(25.7)	(22.4)
Income (loss) before income taxes	0.1	(10.2)	5.2	(11.2)
Income tax benefit	3.0	2.8	5.7	3.7
Net income (loss)	3.1	(7.4)	10.9	(7.5)
Net (income) loss attributable to noncontrolling interests	(0.4)	0.2	(1.1)	0.5
Net income (loss) attributable to Park-Ohio Holdings Corp. common shareholders	$ 2.7	$ (7.2)	$ 9.8	$ (7.0)
Income (loss) per common share attributable to Park-Ohio Holdings Corp. common shareholders:
Basic (in dollars per share)	$ 0.22	$ (0.60)	$ 0.81	$ (0.58)
Diluted (in dollars per share)	$ 0.22	$ (0.60)	$ 0.80	$ (0.58)
Weighted-average shares used to compute income (loss) per share:
Basic (in shares)	12.1	12.1	12.1	12.0
Diluted (in shares)	12.2	12.1	12.2	12.0