Consolidated Statements of Shareholders' Equity - USD ($) $ in Millions	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive (Loss) Income	Noncontrolling Interest
Beginning balance (in shares) at Dec. 31, 2020		16,148,791
Beginning balance at Dec. 31, 2020	$ 357.9	$ 16.1	$ 135.5	$ 290.5	$ (79.8)	$ (18.1)	$ 13.7
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive (loss) income	(27.1)			(24.8)		(1.1)	(1.2)
Stock-based compensation	6.5		6.5
Restricted stock awards issued (in shares)		202,848
Restricted stock awards issued	0.0	$ 0.2	(0.2)
Restricted stock cancelled (in shares)		(11,917)
Dividends	(7.0)			(6.3)			(0.7)
Purchase of treasury stock	(5.5)				(5.5)
Increase in Park-Ohio ownership interest	0.0		1.1				(1.1)
Ending balance (in shares) at Dec. 31, 2021		16,339,722
Ending balance at Dec. 31, 2021	324.8	$ 16.3	142.9	259.4	(85.3)	(19.2)	10.7
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive (loss) income	(55.5)			(14.2)		(42.6)	1.3
Stock-based compensation	7.2		7.2
Restricted stock awards issued (in shares)		331,455
Restricted stock awards issued	0.0	$ 0.3	(0.3)
Restricted stock cancelled (in shares)		(17,249)
Dividends	(7.0)			(6.4)			(0.6)
Purchase of treasury stock	(1.6)				(1.6)
Ending balance (in shares) at Dec. 31, 2022		16,653,928
Ending balance at Dec. 31, 2022	267.9	$ 16.6	149.8	238.8	(86.9)	(61.8)	11.4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive (loss) income	24.9			7.8		18.1	(1.0)
Stock-based compensation	6.5		6.5
Restricted stock awards issued (in shares)		386,983
Restricted stock awards issued	0.0	$ 0.4	(0.4)
Restricted stock cancelled (in shares)		(10,973)
Dividends	(7.4)			(6.5)			(0.9)
Purchase of treasury stock	(2.0)				(2.0)
Ending balance (in shares) at Dec. 31, 2023		17,029,938
Ending balance at Dec. 31, 2023	$ 289.9	$ 17.0	$ 155.9	$ 240.1	$ (88.9)	$ (43.7)	$ 9.5