Condensed Consolidated Statements of Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Income Statement [Abstract]
Net sales	$ 329.4	$ 377.3	$ 657.4	$ 752.0
Cost of sales	275.1	316.9	555.3	633.2
Gross profit	54.3	60.4	102.1	118.8
Selling, general and administrative expenses	34.0	34.8	66.5	68.9
Asset impairment	0.0	0.0	4.0	0.0
Operating income	20.3	25.6	31.6	49.9
Interest expense	7.0	6.9	14.1	13.7
Income before income taxes	13.3	18.7	17.5	36.2
Income tax expense	4.3	6.1	5.8	12.5
Net income	9.0	12.6	11.7	23.7
Net income attributable to noncontrolling interest	0.0	(0.2)	0.0	(0.5)
Net income attributable to ParkOhio common shareholders	$ 9.0	$ 12.4	$ 11.7	$ 23.2
Earnings per common share attributable to ParkOhio common shareholders:
Basic (in dollars per share)	$ 0.74	$ 1.02	$ 0.97	$ 1.90
Diluted (in dollars per share)	$ 0.73	$ 1.00	$ 0.96	$ 1.87
Weighted-average shares used to compute earnings per share:
Basic (in shares)	12,112,575	12,230,100	12,094,695	12,198,169
Diluted (in shares)	12,276,858	12,427,395	12,246,020	12,428,490
Dividends per common share (in dollars per share)	$ 0.125	$ 0.125	$ 0.250	$ 0.250