Income Taxes	9 Months Ended
	Sep. 30, 2022
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Income tax expense related to continuing operations for the three and nine months ended September 30, 2022 was $9.4 million and $7.5 million, respectively, compared with $7.8 million and $14.7 million for the three and nine months ended September 30, 2021, respectively. Income tax expense related to continuing operations for the three months ended September 30, 2022 compared with the three months ended September 30, 2021 increased primarily due to disallowed interest expense in U.S. due to lower taxable income, offset by lower operating income primarily as a result of cost increases due to inflation. Income tax expense related to continuing operations for the nine months ended September 30, 2022 compared with the nine months ended September 30, 2021 decreased primarily from lower operating income as a result of cost increases due to inflation and labor shortages, as well as the tax benefit on a portion of the Harsco Clean Earth Segment goodwill impairment.The reserve for uncertain tax positions at September 30, 2022 was $4.8 million, including interest and penalties.  Within the next twelve months, it is reasonably possible that $0.3 million unrecognized income tax benefits will be recognized upon settlement of tax examinations and the expiration of various statutes of limitations.