| | | | | | | | | | | | | | | | | | | | | |
<?xml version="1.0" encoding="windows-1252"?> |
<FilingSummary> |
| <Version> 3.20.2 </Version> |
| <ProcessingTime/> |
| <ReportFormat> html </ReportFormat> |
| <ContextCount> 616 </ContextCount> |
| <ElementCount> 500 </ElementCount> |
| <EntityCount> 1 </EntityCount> |
| <FootnotesReported> true </FootnotesReported> |
| <SegmentCount> 106 </SegmentCount> |
| <ScenarioCount> 0 </ScenarioCount> |
| <TuplesReported> false </TuplesReported> |
| <UnitCount> 9 </UnitCount> |
| <MyReports> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R1.htm </HtmlFileName> |
| | | <LongName> 0001001 - Document - Cover Page </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/CoverPage </Role> |
| | | <ShortName> Cover Page </ShortName> |
| | | <MenuCategory> Cover </MenuCategory> |
| | | <Position> 1 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R2.htm </HtmlFileName> |
| | | <LongName> 1001002 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETSUnaudited </Role> |
| | | <ShortName> CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) </ShortName> |
| | | <MenuCategory> Statements </MenuCategory> |
| | | <Position> 2 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R3.htm </HtmlFileName> |
| | | <LongName> 1002003 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONSUnaudited </Role> |
| | | <ShortName> CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) </ShortName> |
| | | <MenuCategory> Statements </MenuCategory> |
| | | <Position> 3 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R4.htm </HtmlFileName> |
| | | <LongName> 1003004 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOMEUnaudited </Role> |
| | | <ShortName> CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) </ShortName> |
| | | <MenuCategory> Statements </MenuCategory> |
| | | <Position> 4 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R5.htm </HtmlFileName> |
| | | <LongName> 1004005 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) (Parenthetical) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOMEUnauditedParenthetical </Role> |
| | | <ShortName> CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) (Parenthetical) </ShortName> |
| | | <MenuCategory> Statements </MenuCategory> |
| | | <Position> 5 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R6.htm </HtmlFileName> |
| | | <LongName> 1005006 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWSUnaudited </Role> |
| | | <ShortName> CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) </ShortName> |
| | | <MenuCategory> Statements </MenuCategory> |
| | | <Position> 6 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R7.htm </HtmlFileName> |
| | | <LongName> 1006007 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF EQUITY (Unaudited) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITYUnaudited </Role> |
| | | <ShortName> CONDENSED CONSOLIDATED STATEMENTS OF EQUITY (Unaudited) </ShortName> |
| | | <MenuCategory> Statements </MenuCategory> |
| | | <Position> 7 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R8.htm </HtmlFileName> |
| | | <LongName> 1007008 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF EQUITY (Unaudited) (Parenthetical) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITYUnauditedParenthetical </Role> |
| | | <ShortName> CONDENSED CONSOLIDATED STATEMENTS OF EQUITY (Unaudited) (Parenthetical) </ShortName> |
| | | <MenuCategory> Statements </MenuCategory> |
| | | <Position> 8 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R9.htm </HtmlFileName> |
| | | <LongName> 2101101 - Disclosure - Basis of Presentation </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/BasisofPresentation </Role> |
| | | <ShortName> Basis of Presentation </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 9 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R10.htm </HtmlFileName> |
| | | <LongName> 2104102 - Disclosure - Recently Adopted and Recently Issued Accounting Standards </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/RecentlyAdoptedandRecentlyIssuedAccountingStandards </Role> |
| | | <ShortName> Recently Adopted and Recently Issued Accounting Standards </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 10 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R11.htm </HtmlFileName> |
| | | <LongName> 2107103 - Disclosure - Acquisitions and Dispositions </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/AcquisitionsandDispositions </Role> |
| | | <ShortName> Acquisitions and Dispositions </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 11 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R12.htm </HtmlFileName> |
| | | <LongName> 2116104 - Disclosure - Accounts Receivable (Notes) </LongName> |
| | | <ReportType> Notes </ReportType> |
| | | <Role> http://www.harsco.com/role/AccountsReceivableNotes </Role> |
| | | <ShortName> Accounts Receivable (Notes) </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 12 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R13.htm </HtmlFileName> |
| | | <LongName> 2122105 - Disclosure - Inventories </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/Inventories </Role> |
| | | <ShortName> Inventories </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 13 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R14.htm </HtmlFileName> |
| | | <LongName> 2126106 - Disclosure - Property, Plant and Equipment </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/PropertyPlantandEquipment </Role> |
| | | <ShortName> Property, Plant and Equipment </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 14 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R15.htm </HtmlFileName> |
| | | <LongName> 2129107 - Disclosure - Leases </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/Leases </Role> |
| | | <ShortName> Leases </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 15 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R16.htm </HtmlFileName> |
| | | <LongName> 2138108 - Disclosure - Goodwill and Other Intangible Assets </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/GoodwillandOtherIntangibleAssets </Role> |
| | | <ShortName> Goodwill and Other Intangible Assets </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 16 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R17.htm </HtmlFileName> |
| | | <LongName> 2142109 - Disclosure - Debt and Credit Agreements </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/DebtandCreditAgreements </Role> |
| | | <ShortName> Debt and Credit Agreements </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 17 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R18.htm </HtmlFileName> |
| | | <LongName> 2144110 - Disclosure - Employee Benefit Plans </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/EmployeeBenefitPlans </Role> |
| | | <ShortName> Employee Benefit Plans </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 18 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R19.htm </HtmlFileName> |
| | | <LongName> 2147111 - Disclosure - Income Taxes </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/IncomeTaxes </Role> |
| | | <ShortName> Income Taxes </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 19 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R20.htm </HtmlFileName> |
| | | <LongName> 2149112 - Disclosure - Commitments and Contingencies </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/CommitmentsandContingencies </Role> |
| | | <ShortName> Commitments and Contingencies </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 20 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R21.htm </HtmlFileName> |
| | | <LongName> 2152113 - Disclosure - Reconciliation of Basic and Diluted Shares </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/ReconciliationofBasicandDilutedShares </Role> |
| | | <ShortName> Reconciliation of Basic and Diluted Shares </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 21 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R22.htm </HtmlFileName> |
| | | <LongName> 2156114 - Disclosure - Derivative Instruments, Hedging Activities and Fair Value </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/DerivativeInstrumentsHedgingActivitiesandFairValue </Role> |
| | | <ShortName> Derivative Instruments, Hedging Activities and Fair Value </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 22 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R23.htm </HtmlFileName> |
| | | <LongName> 2162115 - Disclosure - Review of Operations by Segment </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/ReviewofOperationsbySegment </Role> |
| | | <ShortName> Review of Operations by Segment </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 23 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R24.htm </HtmlFileName> |
| | | <LongName> 2165116 - Disclosure - Revenue Recognition </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/RevenueRecognition </Role> |
| | | <ShortName> Revenue Recognition </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 24 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R25.htm </HtmlFileName> |
| | | <LongName> 2171117 - Disclosure - Other (Income) Expenses, Net </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/OtherIncomeExpensesNet </Role> |
| | | <ShortName> Other (Income) Expenses, Net </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 25 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R26.htm </HtmlFileName> |
| | | <LongName> 2174118 - Disclosure - Components of Accumulated Other Comprehensive Loss </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/ComponentsofAccumulatedOtherComprehensiveLoss </Role> |
| | | <ShortName> Components of Accumulated Other Comprehensive Loss </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 26 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R27.htm </HtmlFileName> |
| | | <LongName> 2202201 - Disclosure - Basis of Presentation (Policies) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/BasisofPresentationPolicies </Role> |
| | | <ShortName> Basis of Presentation (Policies) </ShortName> |
| | | <MenuCategory> Policies </MenuCategory> |
| | | <ParentRole> http://www.harsco.com/role/RecentlyAdoptedandRecentlyIssuedAccountingStandards </ParentRole> |
| | | <Position> 27 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R28.htm </HtmlFileName> |
| | | <LongName> 2308302 - Disclosure - Acquisitions and Dispositions (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/AcquisitionsandDispositionsTables </Role> |
| | | <ShortName> Acquisitions and Dispositions (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://www.harsco.com/role/AcquisitionsandDispositions </ParentRole> |
| | | <Position> 28 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R29.htm </HtmlFileName> |
| | | <LongName> 2317303 - Disclosure - Accounts Receivable (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/AccountsReceivableTables </Role> |
| | | <ShortName> Accounts Receivable (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://www.harsco.com/role/AccountsReceivableNotes </ParentRole> |
| | | <Position> 29 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R30.htm </HtmlFileName> |
| | | <LongName> 2323304 - Disclosure - Inventories (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/InventoriesTables </Role> |
| | | <ShortName> Inventories (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://www.harsco.com/role/Inventories </ParentRole> |
| | | <Position> 30 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R31.htm </HtmlFileName> |
| | | <LongName> 2327305 - Disclosure - Property, Plant and Equipment (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/PropertyPlantandEquipmentTables </Role> |
| | | <ShortName> Property, Plant and Equipment (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://www.harsco.com/role/PropertyPlantandEquipment </ParentRole> |
| | | <Position> 31 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R32.htm </HtmlFileName> |
| | | <LongName> 2330306 - Disclosure - Leases (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/LeasesTables </Role> |
| | | <ShortName> Leases (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://www.harsco.com/role/Leases </ParentRole> |
| | | <Position> 32 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R33.htm </HtmlFileName> |
| | | <LongName> 2339307 - Disclosure - Goodwill and Other Intangible Assets (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/GoodwillandOtherIntangibleAssetsTables </Role> |
| | | <ShortName> Goodwill and Other Intangible Assets (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://www.harsco.com/role/GoodwillandOtherIntangibleAssets </ParentRole> |
| | | <Position> 33 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R34.htm </HtmlFileName> |
| | | <LongName> 2345308 - Disclosure - Employee Benefit Plans (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/EmployeeBenefitPlansTables </Role> |
| | | <ShortName> Employee Benefit Plans (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://www.harsco.com/role/EmployeeBenefitPlans </ParentRole> |
| | | <Position> 34 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R35.htm </HtmlFileName> |
| | | <LongName> 2350309 - Disclosure - Commitment and Contingencies (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/CommitmentandContingenciesTables </Role> |
| | | <ShortName> Commitment and Contingencies (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <Position> 35 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R36.htm </HtmlFileName> |
| | | <LongName> 2353310 - Disclosure - Reconciliation of Basic and Diluted Shares (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/ReconciliationofBasicandDilutedSharesTables </Role> |
| | | <ShortName> Reconciliation of Basic and Diluted Shares (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://www.harsco.com/role/ReconciliationofBasicandDilutedShares </ParentRole> |
| | | <Position> 36 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R37.htm </HtmlFileName> |
| | | <LongName> 2357311 - Disclosure - Derivative Instruments, Hedging Activities and Fair Value (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/DerivativeInstrumentsHedgingActivitiesandFairValueTables </Role> |
| | | <ShortName> Derivative Instruments, Hedging Activities and Fair Value (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://www.harsco.com/role/DerivativeInstrumentsHedgingActivitiesandFairValue </ParentRole> |
| | | <Position> 37 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R38.htm </HtmlFileName> |
| | | <LongName> 2363312 - Disclosure - Review of Operations by Segment (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/ReviewofOperationsbySegmentTables </Role> |
| | | <ShortName> Review of Operations by Segment (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://www.harsco.com/role/ReviewofOperationsbySegment </ParentRole> |
| | | <Position> 38 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R39.htm </HtmlFileName> |
| | | <LongName> 2366313 - Disclosure - Revenue Recognition (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/RevenueRecognitionTables </Role> |
| | | <ShortName> Revenue Recognition (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://www.harsco.com/role/RevenueRecognition </ParentRole> |
| | | <Position> 39 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R40.htm </HtmlFileName> |
| | | <LongName> 2372314 - Disclosure - Other (Income) Expenses, Net (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/OtherIncomeExpensesNetTables </Role> |
| | | <ShortName> Other (Income) Expenses, Net (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://www.harsco.com/role/OtherIncomeExpensesNet </ParentRole> |
| | | <Position> 40 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R41.htm </HtmlFileName> |
| | | <LongName> 2375315 - Disclosure - Components of Accumulated Other Comprehensive Loss (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/ComponentsofAccumulatedOtherComprehensiveLossTables </Role> |
| | | <ShortName> Components of Accumulated Other Comprehensive Loss (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://www.harsco.com/role/ComponentsofAccumulatedOtherComprehensiveLoss </ParentRole> |
| | | <Position> 41 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R42.htm </HtmlFileName> |
| | | <LongName> 2403401 - Disclosure - Basis of Presentation (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/BasisofPresentationDetails </Role> |
| | | <ShortName> Basis of Presentation (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://www.harsco.com/role/BasisofPresentationPolicies </ParentRole> |
| | | <Position> 42 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R43.htm </HtmlFileName> |
| | | <LongName> 2409403 - Disclosure - Acquisitions and Dispositions - Acquisitions Narrative (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/AcquisitionsandDispositionsAcquisitionsNarrativeDetails </Role> |
| | | <ShortName> Acquisitions and Dispositions - Acquisitions Narrative (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 43 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R44.htm </HtmlFileName> |
| | | <LongName> 2410404 - Disclosure - Acquisitions and Dispositions - Assets Acquired and Liabilities Assumed (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/AcquisitionsandDispositionsAssetsAcquiredandLiabilitiesAssumedDetails </Role> |
| | | <ShortName> Acquisitions and Dispositions - Assets Acquired and Liabilities Assumed (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 44 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R45.htm </HtmlFileName> |
| | | <LongName> 2411405 - Disclosure - Acquisitions and Dispositions - Preliminary Valuation of Identifiable Intangible Assets and Amortization Periods (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/AcquisitionsandDispositionsPreliminaryValuationofIdentifiableIntangibleAssetsandAmortizationPeriodsDetails </Role> |
| | | <ShortName> Acquisitions and Dispositions - Preliminary Valuation of Identifiable Intangible Assets and Amortization Periods (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 45 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R46.htm </HtmlFileName> |
| | | <LongName> 2412406 - Disclosure - Acquisitions and Dispositions - Pro Forma Information (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/AcquisitionsandDispositionsProFormaInformationDetails </Role> |
| | | <ShortName> Acquisitions and Dispositions - Pro Forma Information (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 46 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R47.htm </HtmlFileName> |
| | | <LongName> 2414408 - Disclosure - Acquisitions and Dispositions - Financial Information Included in Net Income from Discontinued Operations (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/AcquisitionsandDispositionsFinancialInformationIncludedinNetIncomefromDiscontinuedOperationsDetails </Role> |
| | | <ShortName> Acquisitions and Dispositions - Financial Information Included in Net Income from Discontinued Operations (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 47 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R48.htm </HtmlFileName> |
| | | <LongName> 2415409 - Disclosure - Acquisitions and Dispositions - Condensed Consolidated Statements of Cash Flows (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/AcquisitionsandDispositionsCondensedConsolidatedStatementsofCashFlowsDetails </Role> |
| | | <ShortName> Acquisitions and Dispositions - Condensed Consolidated Statements of Cash Flows (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 48 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R49.htm </HtmlFileName> |
| | | <LongName> 2418410 - Disclosure - Accounts Receivable (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/AccountsReceivableDetails </Role> |
| | | <ShortName> Accounts Receivable (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://www.harsco.com/role/AccountsReceivableTables </ParentRole> |
| | | <Position> 49 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R50.htm </HtmlFileName> |
| | | <LongName> 2419411 - Disclosure - Accounts Receivable - Schedule of Receivables (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/AccountsReceivableScheduleofReceivablesDetails </Role> |
| | | <ShortName> Accounts Receivable - Schedule of Receivables (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 50 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R51.htm </HtmlFileName> |
| | | <LongName> 2420412 - Disclosure - Accounts Receivable - Schedule of Changes in Provisions For Allowance For Credit Loss (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/AccountsReceivableScheduleofChangesinProvisionsForAllowanceForCreditLossDetails </Role> |
| | | <ShortName> Accounts Receivable - Schedule of Changes in Provisions For Allowance For Credit Loss (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 51 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R52.htm </HtmlFileName> |
| | | <LongName> 2421413 - Disclosure - Accounts Receivable - Schedule of Fair Value of Notes Receivable (Details) </LongName> |
| | | <ReportType> Notes </ReportType> |
| | | <Role> http://www.harsco.com/role/AccountsReceivableScheduleofFairValueofNotesReceivableDetails </Role> |
| | | <ShortName> Accounts Receivable - Schedule of Fair Value of Notes Receivable (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 52 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R53.htm </HtmlFileName> |
| | | <LongName> 2424414 - Disclosure - Inventories (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/InventoriesDetails </Role> |
| | | <ShortName> Inventories (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://www.harsco.com/role/InventoriesTables </ParentRole> |
| | | <Position> 53 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R54.htm </HtmlFileName> |
| | | <LongName> 2425415 - Disclosure - Inventories - Schedule of Inventory (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/InventoriesScheduleofInventoryDetails </Role> |
| | | <ShortName> Inventories - Schedule of Inventory (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 54 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R55.htm </HtmlFileName> |
| | | <LongName> 2428416 - Disclosure - Property, Plant and Equipment (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/PropertyPlantandEquipmentDetails </Role> |
| | | <ShortName> Property, Plant and Equipment (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://www.harsco.com/role/PropertyPlantandEquipmentTables </ParentRole> |
| | | <Position> 55 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R56.htm </HtmlFileName> |
| | | <LongName> 2431417 - Disclosure - Leases - Narrative (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/LeasesNarrativeDetails </Role> |
| | | <ShortName> Leases - Narrative (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 56 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R57.htm </HtmlFileName> |
| | | <LongName> 2432418 - Disclosure - Leases - Components of Lease Expense (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/LeasesComponentsofLeaseExpenseDetails </Role> |
| | | <ShortName> Leases - Components of Lease Expense (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 57 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R58.htm </HtmlFileName> |
| | | <LongName> 2433419 - Disclosure - Leases - Supplemental Cash Flow Information Related to Leases (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/LeasesSupplementalCashFlowInformationRelatedtoLeasesDetails </Role> |
| | | <ShortName> Leases - Supplemental Cash Flow Information Related to Leases (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 58 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R59.htm </HtmlFileName> |
| | | <LongName> 2434420 - Disclosure - Leases - Supplemental Balance Sheet Information Related to Leases (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/LeasesSupplementalBalanceSheetInformationRelatedtoLeasesDetails </Role> |
| | | <ShortName> Leases - Supplemental Balance Sheet Information Related to Leases (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 59 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R60.htm </HtmlFileName> |
| | | <LongName> 2435421 - Disclosure - Leases - Supplemental Additional Information (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/LeasesSupplementalAdditionalInformationDetails </Role> |
| | | <ShortName> Leases - Supplemental Additional Information (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 60 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R61.htm </HtmlFileName> |
| | | <LongName> 2436422 - Disclosure - Leases - Maturities of Lease Liabilities (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/LeasesMaturitiesofLeaseLiabilitiesDetails </Role> |
| | | <ShortName> Leases - Maturities of Lease Liabilities (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 61 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R62.htm </HtmlFileName> |
| | | <LongName> 2440424 - Disclosure - Goodwill and Other Intangible Assets - Changes in Carrying Amounts of Goodwill by Segment (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/GoodwillandOtherIntangibleAssetsChangesinCarryingAmountsofGoodwillbySegmentDetails </Role> |
| | | <ShortName> Goodwill and Other Intangible Assets - Changes in Carrying Amounts of Goodwill by Segment (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 62 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R63.htm </HtmlFileName> |
| | | <LongName> 2441425 - Disclosure - Goodwill and Other Intangible Assets - Other Intangible Assets (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/GoodwillandOtherIntangibleAssetsOtherIntangibleAssetsDetails </Role> |
| | | <ShortName> Goodwill and Other Intangible Assets - Other Intangible Assets (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 63 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R64.htm </HtmlFileName> |
| | | <LongName> 2443426 - Disclosure - Debt and Credit Agreements - Narrative (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/DebtandCreditAgreementsNarrativeDetails </Role> |
| | | <ShortName> Debt and Credit Agreements - Narrative (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 64 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R65.htm </HtmlFileName> |
| | | <LongName> 2446427 - Disclosure - Employee Benefit Plans (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/EmployeeBenefitPlansDetails </Role> |
| | | <ShortName> Employee Benefit Plans (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://www.harsco.com/role/EmployeeBenefitPlansTables </ParentRole> |
| | | <Position> 65 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R66.htm </HtmlFileName> |
| | | <LongName> 2448428 - Disclosure - Income Taxes (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/IncomeTaxesDetails </Role> |
| | | <ShortName> Income Taxes (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://www.harsco.com/role/IncomeTaxes </ParentRole> |
| | | <Position> 66 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R67.htm </HtmlFileName> |
| | | <LongName> 2451429 - Disclosure - Commitments and Contingencies (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/CommitmentsandContingenciesDetails </Role> |
| | | <ShortName> Commitments and Contingencies (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://www.harsco.com/role/CommitmentsandContingencies </ParentRole> |
| | | <Position> 67 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R68.htm </HtmlFileName> |
| | | <LongName> 2454430 - Disclosure - Reconciliation of Basic and Diluted Shares - Reconciliation of Basic and Diluted Shares (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/ReconciliationofBasicandDilutedSharesReconciliationofBasicandDilutedSharesDetails </Role> |
| | | <ShortName> Reconciliation of Basic and Diluted Shares - Reconciliation of Basic and Diluted Shares (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 68 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R69.htm </HtmlFileName> |
| | | <LongName> 2455431 - Disclosure - Reconciliation of Basic and Diluted Shares - Antidilutive Securities Excluded from Computation of Earnings per Share (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/ReconciliationofBasicandDilutedSharesAntidilutiveSecuritiesExcludedfromComputationofEarningsperShareDetails </Role> |
| | | <ShortName> Reconciliation of Basic and Diluted Shares - Antidilutive Securities Excluded from Computation of Earnings per Share (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 69 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R70.htm </HtmlFileName> |
| | | <LongName> 2458432 - Disclosure - Derivative Instruments, Hedging Activities and Fair Value - Fair Value of Outstanding Derivative Contracts (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/DerivativeInstrumentsHedgingActivitiesandFairValueFairValueofOutstandingDerivativeContractsDetails </Role> |
| | | <ShortName> Derivative Instruments, Hedging Activities and Fair Value - Fair Value of Outstanding Derivative Contracts (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 70 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R71.htm </HtmlFileName> |
| | | <LongName> 2459433 - Disclosure - Derivative Instruments, Hedging Activities and Fair Value - Narrative (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/DerivativeInstrumentsHedgingActivitiesandFairValueNarrativeDetails </Role> |
| | | <ShortName> Derivative Instruments, Hedging Activities and Fair Value - Narrative (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://www.harsco.com/role/DerivativeInstrumentsHedgingActivitiesandFairValueTables </ParentRole> |
| | | <Position> 71 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R72.htm </HtmlFileName> |
| | | <LongName> 2460434 - Disclosure - Derivative Instruments, Hedging Activities and Fair Value - Effect of Derivative Instruments (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/DerivativeInstrumentsHedgingActivitiesandFairValueEffectofDerivativeInstrumentsDetails </Role> |
| | | <ShortName> Derivative Instruments, Hedging Activities and Fair Value - Effect of Derivative Instruments (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 72 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R73.htm </HtmlFileName> |
| | | <LongName> 2461435 - Disclosure - Derivative Instruments, Hedging Activities and Fair Value - Derivatives Designated as Hedging Instruments (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/DerivativeInstrumentsHedgingActivitiesandFairValueDerivativesDesignatedasHedgingInstrumentsDetails </Role> |
| | | <ShortName> Derivative Instruments, Hedging Activities and Fair Value - Derivatives Designated as Hedging Instruments (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 73 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R74.htm </HtmlFileName> |
| | | <LongName> 2464436 - Disclosure - Review of Operations by Segment (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/ReviewofOperationsbySegmentDetails </Role> |
| | | <ShortName> Review of Operations by Segment (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://www.harsco.com/role/ReviewofOperationsbySegmentTables </ParentRole> |
| | | <Position> 74 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R75.htm </HtmlFileName> |
| | | <LongName> 2467437 - Disclosure - Revenue Recognition - Revenues by Primary Geographical Markets (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/RevenueRecognitionRevenuesbyPrimaryGeographicalMarketsDetails </Role> |
| | | <ShortName> Revenue Recognition - Revenues by Primary Geographical Markets (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 75 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R76.htm </HtmlFileName> |
| | | <LongName> 2468438 - Disclosure - Revenue Recognition - Narrative (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/RevenueRecognitionNarrativeDetails </Role> |
| | | <ShortName> Revenue Recognition - Narrative (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 76 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R77.htm </HtmlFileName> |
| | | <LongName> 2469439 - Disclosure - Revenue Recognition - Remaining Performance Obligation (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/RevenueRecognitionRemainingPerformanceObligationDetails </Role> |
| | | <ShortName> Revenue Recognition - Remaining Performance Obligation (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 77 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R78.htm </HtmlFileName> |
| | | <LongName> 2470440 - Disclosure - Revenue Recognition - Remaining Performance Obligation (2) (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/RevenueRecognitionRemainingPerformanceObligation2Details </Role> |
| | | <ShortName> Revenue Recognition - Remaining Performance Obligation (2) (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 78 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R79.htm </HtmlFileName> |
| | | <LongName> 2473441 - Disclosure - Other (Income) Expenses, Net (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/OtherIncomeExpensesNetDetails </Role> |
| | | <ShortName> Other (Income) Expenses, Net (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://www.harsco.com/role/OtherIncomeExpensesNetTables </ParentRole> |
| | | <Position> 79 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R80.htm </HtmlFileName> |
| | | <LongName> 2476442 - Disclosure - Components of Accumulated Other Comprehensive Loss - Accumulated Other Comprehensive Income Loss (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/ComponentsofAccumulatedOtherComprehensiveLossAccumulatedOtherComprehensiveIncomeLossDetails </Role> |
| | | <ShortName> Components of Accumulated Other Comprehensive Loss - Accumulated Other Comprehensive Income Loss (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 80 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R81.htm </HtmlFileName> |
| | | <LongName> 2477443 - Disclosure - Components of Accumulated Other Comprehensive Loss - Reclassification out of Accumulated Other Comprehensive Income (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.harsco.com/role/ComponentsofAccumulatedOtherComprehensiveLossReclassificationoutofAccumulatedOtherComprehensiveIncomeDetails </Role> |
| | | <ShortName> Components of Accumulated Other Comprehensive Loss - Reclassification out of Accumulated Other Comprehensive Income (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 81 </Position> |
| | | </Report> |
| | <Report instance="hsc-20200630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R9999.htm </HtmlFileName> |
| | | <LongName> Uncategorized Items - hsc-20200630.htm </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://xbrl.sec.gov/role/uncategorizedFacts </Role> |
| | | <ShortName> Uncategorized Items - hsc-20200630.htm </ShortName> |
| | | <MenuCategory> Cover </MenuCategory> |
| | | <Position> 82 </Position> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <LongName> All Reports </LongName> |
| | | <ReportType> Book </ReportType> |
| | | <ShortName> All Reports </ShortName> |
| | | </Report> |
| | </MyReports> |
| <InputFiles> |
| | <File doctype="10-Q" original="hsc-20200630.htm"> hsc-20200630.htm </File> |
| | <File> exhibit10306302020.htm </File> |
| | <File> hsc-20200630.xsd </File> |
| | <File> hsc-20200630_cal.xml </File> |
| | <File> hsc-20200630_def.xml </File> |
| | <File> hsc-20200630_lab.xml </File> |
| | <File> hsc-20200630_pre.xml </File> |
| | <File> hsc-ex3112020xq2.htm </File> |
| | <File> hsc-ex3122020xq2.htm </File> |
| | <File> hsc-ex322020xq2.htm </File> |
| | <File> hscex104-062020.htm </File> |
| | </InputFiles> |
| <SupplementalFiles> |
| | <File> hsc-20200630_g1.jpg </File> |
| | </SupplementalFiles> |
| <BaseTaxonomies> |
| | <BaseTaxonomy> http://xbrl.sec.gov/country/2017-01-31 </BaseTaxonomy> |
| | <BaseTaxonomy> http://fasb.org/srt/2019-01-31 </BaseTaxonomy> |
| | <BaseTaxonomy> http://fasb.org/us-gaap/2019-01-31 </BaseTaxonomy> |
| | <BaseTaxonomy> http://xbrl.sec.gov/currency/2019-01-31 </BaseTaxonomy> |
| | <BaseTaxonomy> http://xbrl.sec.gov/dei/2019-01-31 </BaseTaxonomy> |
| | </BaseTaxonomies> |
| <HasPresentationLinkbase> true </HasPresentationLinkbase> |
| <HasCalculationLinkbase> true </HasCalculationLinkbase> |
| </FilingSummary> |