Contractual Penalty

No definition available.

Name:	hsc_ContractualPenalty
Namespace Prefix:	hsc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Disposal Group, Including Discontinued Operation, Corporate Overhead

+ References

No definition available.

+ Details

Name:	hsc_DisposalGroupIncludingDiscontinuedOperationCorporateOverhead
Namespace Prefix:	hsc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Percentage Complete

+ References

No definition available.

+ Details

Name:	hsc_PercentageComplete
Namespace Prefix:	hsc_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Revenue Reduction

+ References

No definition available.

+ Details

Name:	hsc_RevenueReduction
Namespace Prefix:	hsc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_BusinessAcquisitionLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Losses recognized in the current period on contracts which are expected to generate losses, which are probable and can be reasonably estimated, in a future period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.2)
-URI https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 605
-SubTopic 35
-Section 45
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=126916656&loc=d3e57763-111642

+ Details

Name:	us-gaap_LossOnContracts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Cumulative provision for contract losses not offset against related costs accumulated on the balance sheet.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 605
-SubTopic 35
-Section 45
-Paragraph 2
-URI https://asc.fasb.org/extlink&oid=126916656&loc=d3e57777-111642

+ Details

Name:	us-gaap_ProvisionForLossOnContracts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	srt_MajorCustomersAxis=hsc_SBBMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	hsc_ContractAxis=hsc_Contract2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_MajorCustomersAxis=hsc_NetworkRailMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_MajorCustomersAxis=hsc_DeutscheBahnMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DisposalGroupClassificationAxis=us-gaap_DiscontinuedOperationsHeldforsaleMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Acquisitions and Dispositions - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended			12 Months Ended
	Dec. 31, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021
Business Acquisition [Line Items]
Provision for Loss on Contracts					$ 33,400
SBB
Business Acquisition [Line Items]
Contract estimated forward loss provision for Harsco Rail Segment				$ 3,500
SBB \| Contract 2
Business Acquisition [Line Items]
Percentage Complete	83.00%			83.00%
Network Rail
Business Acquisition [Line Items]
Contract estimated forward loss provision for Harsco Rail Segment				$ 29,100
Revenue Reduction	$ 4,600	$ 300	$ 24,200
Network Rail \| Contract 2
Business Acquisition [Line Items]
Percentage Complete	50.00%			50.00%
Deutsche Bahn
Business Acquisition [Line Items]
Contract estimated forward loss provision for Harsco Rail Segment			$ 7,500	$ 11,500
Revenue Reduction	$ 4,000
Contractual Penalty				$ 3,100
Deutsche Bahn \| Contract 2
Business Acquisition [Line Items]
Percentage Complete	32.00%			32.00%
Discontinued Operations, Held-for-sale
Business Acquisition [Line Items]
Disposal Group, Including Discontinued Operation, Corporate Overhead				$ 4,200