Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Income Statement [Abstract]
Net sales	$ 359.6	$ 366.3
Cost of sales	307.6	312.4
Gross profit	52.0	53.9
Selling, general and administrative expenses	39.7	40.9
Operating income	12.3	13.0
Other components of pension income and other postretirement benefits expense, net	2.4	1.8
Interest expense, net	(7.4)	(8.0)
Income before income taxes	7.3	6.8
Income tax expense	(1.9)	(5.5)
Net income	5.4	1.3
Net loss (income) attributable to noncontrolling interests	0.1	(0.1)
Net income attributable to Park-Ohio Holdings Corp. common shareholders	$ 5.5	$ 1.2
Income per common share attributable to Park-Ohio Holdings Corp. common shareholders:
Basic (in dollars per share)	$ 0.46	$ 0.10
Diluted (in dollars per share)	$ 0.45	$ 0.10
Weighted-average shares used to compute income per share:
Basic (in shares)	12.0	12.2
Diluted (in shares)	12.3	12.3