Income Taxes	6 Months Ended
	Jun. 30, 2022
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Income tax benefit related to continuing operations for the three and six months ended June 30, 2022 was $3.1 million and $1.9 million, respectively. Income tax expense related to continuing operations for the three and six months ended June 30, 2021 was $4.8 million and $6.9 million, respectively. The change in the income tax benefit for the three and six months ended June 30, 2022 compared with the income tax expense for the three months and six months ended June 30, 2021 is the result of lower taxable income, primarily resulting from decreased 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 June 30, 2022 was $4.9 million, including interest and penalties.  Within the next twelve months, it is reasonably possible that $0.4 million unrecognized income tax benefits will be recognized upon settlement of tax examinations and the expiration of various statutes of limitations.