Condensed Consolidated Statements of Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Income Statement [Abstract]
Net sales	$ 364.4	$ 344.6	$ 1,116.4	$ 1,005.7
Cost of sales	302.1	284.0	935.3	828.1
Gross profit	62.3	60.6	181.1	177.6
Selling, general and administrative expenses	34.9	34.2	103.8	102.9
Operating income	27.4	26.4	77.3	74.7
Interest expense	7.0	6.5	20.7	19.4
Income before income taxes	20.4	19.9	56.6	55.3
Income tax expense	7.2	7.4	19.7	19.6
Net income	13.2	12.5	36.9	35.7
Net income attributable to noncontrolling interest	0.0	(0.1)	(0.5)	(0.8)
Net income attributable to ParkOhio common shareholders	$ 13.2	$ 12.4	$ 36.4	$ 34.9
Earnings per common share attributable to ParkOhio common shareholders:
Basic (in dollars per share)	$ 1.07	$ 1.02	$ 2.98	$ 2.88
Diluted (in dollars per share)	$ 1.06	$ 1.00	$ 2.94	$ 2.82
Weighted-average shares used to compute earnings per share:
Basic (in shares)	12,288,392	12,133,153	12,228,721	12,081,787
Diluted (in shares)	12,398,368	12,368,395	12,415,073	12,357,808
Dividend per common share (in dollars per share)	$ 0.125	$ 0.125	$ 0.375	$ 0.25