Condensed Consolidated Statements of Income (Unaudited) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Income Statement [Abstract]
Net sales	$ 344.6	$ 303.5	$ 1,005.7	$ 893.8
Cost of sales	284.0	248.9	828.1	730.1
Gross profit	60.6	54.6	177.6	163.7
Selling, general and administrative expenses	34.2	31.1	102.9	92.2
Litigation judgment costs	0	5.2	0	5.2
Operating income	26.4	18.3	74.7	66.3
Gain on acquisition of business	0	(0.6)	0	(0.6)
Interest expense	6.5	6.5	19.4	19.4
Income from continuing operations before income taxes	19.9	12.4	55.3	47.5
Income tax expense	7.4	3.7	19.6	16.0
Net income from continuing operations	12.5	8.7	35.7	31.5
Income from discontinued operations, net of taxes	0	3.7	0	3.2
Net income	12.5	12.4	35.7	34.7
Net income attributable to noncontrolling interest	(0.1)	(0.2)	(0.8)	(0.2)
Net income attributable to ParkOhio common shareholders	$ 12.4	$ 12.2	$ 34.9	$ 34.5
Earnings per common share attributable to ParkOhio common shareholders - Basic:
Continuing operations (in dollars per share)	$ 1.02	$ 0.71	$ 2.88	$ 2.63
Discontinued operations (in dollars per share)	$ 0.00	$ 0.31	$ 0.00	$ 0.27
Total (in dollars per share)	$ 1.02	$ 1.02	$ 2.88	$ 2.90
Earnings per common share attributable to ParkOhio common shareholders - Diluted:
Continuing operations (in dollars per share)	$ 1.00	$ 0.69	$ 2.82	$ 2.57
Discontinued operations (in dollars per share)	$ 0.00	$ 0.30	$ 0.00	$ 0.26
Total (in dollars per share)	$ 1.00	$ 0.99	$ 2.82	$ 2.83
Weighted-average shares used to compute earnings per share:
Basic (in shares)	12,133,153	12,002,344	12,081,787	11,913,765
Diluted (in shares)	12,368,395	12,267,041	12,357,808	12,210,229
Dividend per common share (in dollars per share)	$ 0.125	$ 0	$ 0.25	$ 0