Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Statement [Abstract]
Net sales	$ 428.6	$ 350.0	$ 847.0	$ 709.6
Cost of sales	378.8	310.1	743.5	617.7
Gross profit	49.8	39.9	103.5	91.9
Selling, general and administrative expenses	45.0	43.3	90.8	83.0
Gain on sale of assets	(2.9)	0.0	(2.9)	0.0
Operating income (loss)	7.7	(3.4)	15.6	8.9
Other components of pension income and other postretirement benefits expense, net	2.8	2.5	5.6	4.9
Interest expense, net	(8.3)	(7.4)	(16.1)	(14.8)
Income (loss) before income taxes	2.2	(8.3)	5.1	(1.0)
Income tax (expense) benefit	(0.7)	2.8	2.7	0.9
Net income (loss)	1.5	(5.5)	7.8	(0.1)
Net (income) loss attributable to noncontrolling interests	(0.5)	0.2	(0.7)	0.3
Net income (loss) attributable to Park-Ohio Holdings Corp. common shareholders	$ 1.0	$ (5.3)	$ 7.1	$ 0.2
Income (loss) per common share attributable to Park-Ohio Holdings Corp. common shareholders:
Basic (in dollars per share)	$ 0.08	$ (0.44)	$ 0.59	$ 0.02
Diluted (in dollars per share)	$ 0.08	$ (0.44)	$ 0.58	$ 0.02
Weighted-average shares used to compute income (loss) per share:
Basic (in shares)	12.1	12.0	12.1	12.0
Diluted (in shares)	12.2	12.0	12.2	12.3