| Cover | Mar. 02, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Mar. 2, 2021 |
| Entity File Number | 000-03134 |
| Entity Registrant Name | Park-Ohio Holdings Corp. |
| Entity Incorporation, State or Country Code | OH |
| Entity Tax Identification Number | 34-1867219 |
| Entity Address, Address Line One | 6065 Parkland Boulevard, |
| Entity Address, City or Town | Cleveland, |
| Entity Address, State or Province | OH |
| Entity Address, Postal Zip Code | 44124 |
| City Area Code | 440 |
| Local Phone Number | 947-2000 |
| Title of 12(b) Security | Common Stock, Par Value $1.00 Per Share |
| Trading Symbol | PKOH |
| Security Exchange Name | NASDAQ |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0000076282 |
| Amendment Flag | false |
