Condensed Consolidated Statements of Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Income Statement [Abstract]
Net sales	$ 377.3	$ 343.3	$ 752.0	$ 661.1
Cost of sales	316.9	282.3	633.2	544.1
Gross profit	60.4	61.0	118.8	117.0
Selling, general and administrative expenses	34.8	34.9	68.9	68.7
Operating income	25.6	26.1	49.9	48.3
Interest expense	6.9	6.6	13.7	12.9
Income before income taxes	18.7	19.5	36.2	35.4
Income tax expense	6.1	6.6	12.5	12.2
Net income	12.6	12.9	23.7	23.2
Net income attributable to noncontrolling interest	(0.2)	(0.5)	(0.5)	(0.7)
Net income attributable to ParkOhio common shareholders	$ 12.4	$ 12.4	$ 23.2	$ 22.5
Earnings per common share attributable to ParkOhio common shareholders:
Basic (in dollars per share)	$ 1.02	$ 1.02	$ 1.90	$ 1.86
Diluted (in dollars per share)	$ 1.00	$ 1.00	$ 1.87	$ 1.81
Weighted-average shares used to compute earnings per share:
Basic (in shares)	12,230,100	12,086,973	12,198,169	12,055,678
Diluted (in shares)	12,427,395	12,372,189	12,428,490	12,355,421
Dividend per common share (in dollars per share)	$ 0.125	$ 0.125	$ 0.250	$ 0.125