Discontinued Operations and Dispositions - Narrative (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Disposal Group, Held-for-Sale, Not Discontinued Operations \| Performix Metallurgical Additives
Business Acquisition [Line Items]
Accounts receivable	$ 4.7	$ 5.3
Harsco Rail Segment
Business Acquisition [Line Items]
Reduction in carrying amount of assets	$ 10.7

Amount classified as accounts, notes and loans receivable attributable to disposal group held for sale or disposed of.

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