| Cover | Apr. 19, 2023 |
| Cover [Abstract] | |
| Amendment Flag | false |
| Document Type | 8-K |
| Entity Registrant Name | Harsco Corporation |
| Entity Central Index Key | 0000045876 |
| Entity File Number | 001-03970 |
| Entity Incorporation, State or Country Code | DE |
| Written Communications | false |
| Entity Tax Identification Number | 23-1483991 |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, par value $1.25 per share |
| Trading Symbol | HSC |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
| Document Period End Date | Apr. 19, 2023 |
| Entity Address, City or Town | Philadelphia |
| Entity Address, State or Province | PA |
| Entity Address, Postal Zip Code | 19103 |
| City Area Code | (267) 857-8715 |
| Local Phone Number | (267) 857-8715 |
| Entity Address, Address Line One | Two Logan Square 100-120 North 18th Street, 17th Floor |
