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Leases - Narrative (Details) - USD ($) $ in Millions | 6 Months Ended |  |
--- | --- | --- | ---
Jun. 30, 2020 | Apr. 06, 2020 | Dec. 31, 2019
Lessee, Lease, Description [Line Items] |  |  |
Operating And Finance Leases, Excluding Short Term Leases, Renewal Option | 10 years |  |
Weighted average remaining lease term - Operating leases (in years) | 8 years 3 months 29 days |  | 11 years 6 months 25 days
Operating And Finance Leases, Excluding Short Term Leases, Termination Option | 1 year |  |
ESOL | Harsco Clean Earth Segment |  |  |
Lessee, Lease, Description [Line Items] |  |  |
Right-of-use assets | $ 56.0 | $ 56.0 |
Minimum |  |  |
Lessee, Lease, Description [Line Items] |  |  |
Operating And Finance Leases, Excluding Short Term Leases, Weighted-Average Remaining Lease Term | 1 year |  |
Maximum |  |  |
Lessee, Lease, Description [Line Items] |  |  |
Operating And Finance Leases, Excluding Short Term Leases, Weighted-Average Remaining Lease Term | 30 years 3 months 18 days |  |

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- Definition Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Operating Lease, Right-of-Use Asset + References No definition available. + Details
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- Definition Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI http://asc.fasb.org/extlink&oid=77888399&loc=SL77918982-209971 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (g)(3) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980 + Details
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