3.24.1.u1 html 238 363 1 false 79 0 false 11 false false R1.htm 0000001 - Document - Cover Page Sheet http://www.spx.com/role/CoverPage Cover Page Cover 1 false false R2.htm 0000002 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME Sheet http://www.spx.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONSANDCOMPREHENSIVEINCOME CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME Statements 2 false false R3.htm 0000003 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS Sheet http://www.spx.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS CONDENSED CONSOLIDATED BALANCE SHEETS Statements 3 false false R4.htm 0000004 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) Sheet http://www.spx.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETSParenthetical CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) Statements 4 false false R5.htm 0000005 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY Sheet http://www.spx.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITY CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY Statements 5 false false R6.htm 0000006 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS Sheet http://www.spx.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS Statements 6 false false R7.htm 0000007 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) Sheet http://www.spx.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWSParenthetical CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) Statements 7 false false R8.htm 0000008 - Disclosure - BASIS OF PRESENTATION Sheet http://www.spx.com/role/BASISOFPRESENTATION BASIS OF PRESENTATION Notes 8 false false R9.htm 0000009 - Disclosure - NEW ACCOUNTING PRONOUNCEMENTS Sheet http://www.spx.com/role/NEWACCOUNTINGPRONOUNCEMENTS NEW ACCOUNTING PRONOUNCEMENTS Notes 9 false false R10.htm 0000010 - Disclosure - AQUISITIONS AND DISCONTINUED OPERATIONS Sheet http://www.spx.com/role/AQUISITIONSANDDISCONTINUEDOPERATIONS AQUISITIONS AND DISCONTINUED OPERATIONS Notes 10 false false R11.htm 0000011 - Disclosure - REVENUES FROM CONTRACTS Sheet http://www.spx.com/role/REVENUESFROMCONTRACTS REVENUES FROM CONTRACTS Notes 11 false false R12.htm 0000012 - Disclosure - LEASES Sheet http://www.spx.com/role/LEASES LEASES Notes 12 false false R13.htm 0000013 - Disclosure - INFORMATION ON REPORTABLE SEGMENTS Sheet http://www.spx.com/role/INFORMATIONONREPORTABLESEGMENTS INFORMATION ON REPORTABLE SEGMENTS Notes 13 false false R14.htm 0000014 - Disclosure - SPECIAL CHARGES, NET Sheet http://www.spx.com/role/SPECIALCHARGESNET SPECIAL CHARGES, NET Notes 14 false false R15.htm 0000015 - Disclosure - INVENTORIES, NET Sheet http://www.spx.com/role/INVENTORIESNET INVENTORIES, NET Notes 15 false false R16.htm 0000016 - Disclosure - GOODWILL AND OTHER INTANGIBLE ASSETS Sheet http://www.spx.com/role/GOODWILLANDOTHERINTANGIBLEASSETS GOODWILL AND OTHER INTANGIBLE ASSETS Notes 16 false false R17.htm 0000017 - Disclosure - WARRANTY Sheet http://www.spx.com/role/WARRANTY WARRANTY Notes 17 false false R18.htm 0000018 - Disclosure - EMPLOYEE BENEFIT PLANS Sheet http://www.spx.com/role/EMPLOYEEBENEFITPLANS EMPLOYEE BENEFIT PLANS Notes 18 false false R19.htm 0000019 - Disclosure - INDEBTEDNESS Sheet http://www.spx.com/role/INDEBTEDNESS INDEBTEDNESS Notes 19 false false R20.htm 0000020 - Disclosure - DERIVATIVE FINANCIAL INSTRUMENTS Sheet http://www.spx.com/role/DERIVATIVEFINANCIALINSTRUMENTS DERIVATIVE FINANCIAL INSTRUMENTS Notes 20 false false R21.htm 0000021 - Disclosure - STOCKHOLDERS' EQUITY AND LONG-TERM INCENTIVE COMPENSATION Sheet http://www.spx.com/role/STOCKHOLDERSEQUITYANDLONGTERMINCENTIVECOMPENSATION STOCKHOLDERS' EQUITY AND LONG-TERM INCENTIVE COMPENSATION Notes 21 false false R22.htm 0000022 - Disclosure - CONTINGENT LIABILITIES AND OTHER MATTERS Sheet http://www.spx.com/role/CONTINGENTLIABILITIESANDOTHERMATTERS CONTINGENT LIABILITIES AND OTHER MATTERS Notes 22 false false R23.htm 0000023 - Disclosure - INCOME AND OTHER TAXES Sheet http://www.spx.com/role/INCOMEANDOTHERTAXES INCOME AND OTHER TAXES Notes 23 false false R24.htm 0000024 - Disclosure - FAIR VALUE Sheet http://www.spx.com/role/FAIRVALUE FAIR VALUE Notes 24 false false R25.htm 995410 - Disclosure - Pay vs Performance Disclosure Sheet http://xbrl.sec.gov/ecd/role/PvpDisclosure Pay vs Performance Disclosure Notes 25 false false R26.htm 995445 - Disclosure - Insider Trading Arrangements Sheet http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements Insider Trading Arrangements Notes 26 false false R27.htm 9954471 - Disclosure - BASIS OF PRESENTATION (Policies) Sheet http://www.spx.com/role/BASISOFPRESENTATIONPolicies BASIS OF PRESENTATION (Policies) Policies 27 false false R28.htm 9954472 - Disclosure - ACQUISITIONS AND DISCONTINUED OPERATIONS (Tables) Sheet http://www.spx.com/role/ACQUISITIONSANDDISCONTINUEDOPERATIONSTables ACQUISITIONS AND DISCONTINUED OPERATIONS (Tables) Tables 28 false false R29.htm 9954473 - Disclosure - REVENUES FROM CONTRACTS (Tables) Sheet http://www.spx.com/role/REVENUESFROMCONTRACTSTables REVENUES FROM CONTRACTS (Tables) Tables http://www.spx.com/role/REVENUESFROMCONTRACTS 29 false false R30.htm 9954474 - Disclosure - INFORMATION ON REPORTABLE SEGMENTS (Tables) Sheet http://www.spx.com/role/INFORMATIONONREPORTABLESEGMENTSTables INFORMATION ON REPORTABLE SEGMENTS (Tables) Tables http://www.spx.com/role/INFORMATIONONREPORTABLESEGMENTS 30 false false R31.htm 9954475 - Disclosure - SPECIAL CHARGES, NET (Tables) Sheet http://www.spx.com/role/SPECIALCHARGESNETTables SPECIAL CHARGES, NET (Tables) Tables http://www.spx.com/role/SPECIALCHARGESNET 31 false false R32.htm 9954476 - Disclosure - INVENTORIES, NET (Tables) Sheet http://www.spx.com/role/INVENTORIESNETTables INVENTORIES, NET (Tables) Tables http://www.spx.com/role/INVENTORIESNET 32 false false R33.htm 9954477 - Disclosure - GOODWILL AND OTHER INTANGIBLE ASSETS (Tables) Sheet http://www.spx.com/role/GOODWILLANDOTHERINTANGIBLEASSETSTables GOODWILL AND OTHER INTANGIBLE ASSETS (Tables) Tables http://www.spx.com/role/GOODWILLANDOTHERINTANGIBLEASSETS 33 false false R34.htm 9954478 - Disclosure - WARRANTY (Tables) Sheet http://www.spx.com/role/WARRANTYTables WARRANTY (Tables) Tables http://www.spx.com/role/WARRANTY 34 false false R35.htm 9954479 - Disclosure - EMPLOYEE BENEFIT PLANS (Tables) Sheet http://www.spx.com/role/EMPLOYEEBENEFITPLANSTables EMPLOYEE BENEFIT PLANS (Tables) Tables http://www.spx.com/role/EMPLOYEEBENEFITPLANS 35 false false R36.htm 9954480 - Disclosure - INDEBTEDNESS (Tables) Sheet http://www.spx.com/role/INDEBTEDNESSTables INDEBTEDNESS (Tables) Tables http://www.spx.com/role/INDEBTEDNESS 36 false false R37.htm 9954481 - Disclosure - STOCKHOLDERS' EQUITY AND LONG-TERM INCENTIVE COMPENSATION (Tables) Sheet http://www.spx.com/role/STOCKHOLDERSEQUITYANDLONGTERMINCENTIVECOMPENSATIONTables STOCKHOLDERS' EQUITY AND LONG-TERM INCENTIVE COMPENSATION (Tables) Tables http://www.spx.com/role/STOCKHOLDERSEQUITYANDLONGTERMINCENTIVECOMPENSATION 37 false false R38.htm 9954482 - Disclosure - BASIS OF PRESENTATION (Details) Sheet http://www.spx.com/role/BASISOFPRESENTATIONDetails BASIS OF PRESENTATION (Details) Details http://www.spx.com/role/BASISOFPRESENTATIONPolicies 38 false false R39.htm 9954483 - Disclosure - ACQUISITIONS AND DISCONTINUED OPERATIONS - Narrative (Details) Sheet http://www.spx.com/role/ACQUISITIONSANDDISCONTINUEDOPERATIONSNarrativeDetails ACQUISITIONS AND DISCONTINUED OPERATIONS - Narrative (Details) Details 39 false false R40.htm 9954484 - Disclosure - ACQUISITIONS AND DISCONTINUED OPERATIONS - Acquisition of Ing??nia and ASPEQ (Details) Sheet http://www.spx.com/role/ACQUISITIONSANDDISCONTINUEDOPERATIONSAcquisitionofIngniaandASPEQDetails ACQUISITIONS AND DISCONTINUED OPERATIONS - Acquisition of Ing??nia and ASPEQ (Details) Details 40 false false R41.htm 9954485 - Disclosure - ACQUISITIONS AND DISCONTINUED OPERATIONS - Pro Forma Results (Details) Sheet http://www.spx.com/role/ACQUISITIONSANDDISCONTINUEDOPERATIONSProFormaResultsDetails ACQUISITIONS AND DISCONTINUED OPERATIONS - Pro Forma Results (Details) Details 41 false false R42.htm 9954486 - Disclosure - ACQUISITIONS AND DISCONTINUED OPERATIONS - Wind-Down of DBT - Assets and Liabilities of Discontinued Operations (Details) Sheet http://www.spx.com/role/ACQUISITIONSANDDISCONTINUEDOPERATIONSWindDownofDBTAssetsandLiabilitiesofDiscontinuedOperationsDetails ACQUISITIONS AND DISCONTINUED OPERATIONS - Wind-Down of DBT - Assets and Liabilities of Discontinued Operations (Details) Details 42 false false R43.htm 9954487 - Disclosure - ACQUISITIONS AND DISCONTINUED OPERATIONS - Wind-Down of Heat Transfer Business - Assets and Liabilities of Discontinued Operations (Details) Sheet http://www.spx.com/role/ACQUISITIONSANDDISCONTINUEDOPERATIONSWindDownofHeatTransferBusinessAssetsandLiabilitiesofDiscontinuedOperationsDetails ACQUISITIONS AND DISCONTINUED OPERATIONS - Wind-Down of Heat Transfer Business - Assets and Liabilities of Discontinued Operations (Details) Details 43 false false R44.htm 9954488 - Disclosure - ACQUISITIONS AND DISCONTINUED OPERATIONS - Results of Operations (Details) Sheet http://www.spx.com/role/ACQUISITIONSANDDISCONTINUEDOPERATIONSResultsofOperationsDetails ACQUISITIONS AND DISCONTINUED OPERATIONS - Results of Operations (Details) Details 44 false false R45.htm 9954489 - Disclosure - REVENUES FROM CONTRACTS - Disaggregated Revenue (Details) Sheet http://www.spx.com/role/REVENUESFROMCONTRACTSDisaggregatedRevenueDetails REVENUES FROM CONTRACTS - Disaggregated Revenue (Details) Details 45 false false R46.htm 9954490 - Disclosure - REVENUES FROM CONTRACTS - Contract Balances (Details) Sheet http://www.spx.com/role/REVENUESFROMCONTRACTSContractBalancesDetails REVENUES FROM CONTRACTS - Contract Balances (Details) Details 46 false false R47.htm 9954491 - Disclosure - REVENUES FROM CONTRACTS - Narrative (Details) Sheet http://www.spx.com/role/REVENUESFROMCONTRACTSNarrativeDetails REVENUES FROM CONTRACTS - Narrative (Details) Details 47 false false R48.htm 9954492 - Disclosure - REVENUES FROM CONTRACTS - Performance Obligation Narrative (Details) Sheet http://www.spx.com/role/REVENUESFROMCONTRACTSPerformanceObligationNarrativeDetails REVENUES FROM CONTRACTS - Performance Obligation Narrative (Details) Details 48 false false R49.htm 9954493 - Disclosure - INFORMATION ON REPORTABLE SEGMENTS - Narrative (Details) Sheet http://www.spx.com/role/INFORMATIONONREPORTABLESEGMENTSNarrativeDetails INFORMATION ON REPORTABLE SEGMENTS - Narrative (Details) Details 49 false false R50.htm 9954494 - Disclosure - INFORMATION ON REPORTABLE SEGMENTS - Financial Data (Details) Sheet http://www.spx.com/role/INFORMATIONONREPORTABLESEGMENTSFinancialDataDetails INFORMATION ON REPORTABLE SEGMENTS - Financial Data (Details) Details 50 false false R51.htm 9954495 - Disclosure - SPECIAL CHARGES, NET - Special Charges (Details) Sheet http://www.spx.com/role/SPECIALCHARGESNETSpecialChargesDetails SPECIAL CHARGES, NET - Special Charges (Details) Details 51 false false R52.htm 9954496 - Disclosure - Special Charges, Net - Analysis of Restructuring Liabilities (Details) Sheet http://www.spx.com/role/SpecialChargesNetAnalysisofRestructuringLiabilitiesDetails Special Charges, Net - Analysis of Restructuring Liabilities (Details) Details 52 false false R53.htm 9954497 - Disclosure - INVENTORIES, NET (Details) Sheet http://www.spx.com/role/INVENTORIESNETDetails INVENTORIES, NET (Details) Details http://www.spx.com/role/INVENTORIESNETTables 53 false false R54.htm 9954498 - Disclosure - GOODWILL AND OTHER INTANGIBLE ASSETS - Goodwill (Details) Sheet http://www.spx.com/role/GOODWILLANDOTHERINTANGIBLEASSETSGoodwillDetails GOODWILL AND OTHER INTANGIBLE ASSETS - Goodwill (Details) Details 54 false false R55.htm 9954499 - Disclosure - GOODWILL AND OTHER INTANGIBLE ASSETS - Other Intangibles, Net (Details) Sheet http://www.spx.com/role/GOODWILLANDOTHERINTANGIBLEASSETSOtherIntangiblesNetDetails GOODWILL AND OTHER INTANGIBLE ASSETS - Other Intangibles, Net (Details) Details 55 false false R56.htm 9954500 - Disclosure - GOODWILL AND OTHER INTANGIBLE ASSETS - Other Intangibles, Net - Additional Information (Details) Sheet http://www.spx.com/role/GOODWILLANDOTHERINTANGIBLEASSETSOtherIntangiblesNetAdditionalInformationDetails GOODWILL AND OTHER INTANGIBLE ASSETS - Other Intangibles, Net - Additional Information (Details) Details 56 false false R57.htm 9954501 - Disclosure - GOODWILL AND OTHER INTANGIBLE ASSETS - Narrative (Details) Sheet http://www.spx.com/role/GOODWILLANDOTHERINTANGIBLEASSETSNarrativeDetails GOODWILL AND OTHER INTANGIBLE ASSETS - Narrative (Details) Details 57 false false R58.htm 9954502 - Disclosure - WARRANTY (Details) Sheet http://www.spx.com/role/WARRANTYDetails WARRANTY (Details) Details http://www.spx.com/role/WARRANTYTables 58 false false R59.htm 9954503 - Disclosure - EMPLOYEE BENEFIT PLANS - Net Periodic Expense (Income) (Details) Sheet http://www.spx.com/role/EMPLOYEEBENEFITPLANSNetPeriodicExpenseIncomeDetails EMPLOYEE BENEFIT PLANS - Net Periodic Expense (Income) (Details) Details 59 false false R60.htm 9954504 - Disclosure - INDEBTEDNESS - Summary of Debt Activity (Details) Sheet http://www.spx.com/role/INDEBTEDNESSSummaryofDebtActivityDetails INDEBTEDNESS - Summary of Debt Activity (Details) Details 60 false false R61.htm 9954505 - Disclosure - INDEBTEDNESS - Senior Credit Facilities (Details) Sheet http://www.spx.com/role/INDEBTEDNESSSeniorCreditFacilitiesDetails INDEBTEDNESS - Senior Credit Facilities (Details) Details 61 false false R62.htm 9954506 - Disclosure - INDEBTEDNESS - Company-owned Life Insurance (Details) Sheet http://www.spx.com/role/INDEBTEDNESSCompanyownedLifeInsuranceDetails INDEBTEDNESS - Company-owned Life Insurance (Details) Details 62 false false R63.htm 9954507 - Disclosure - DERIVATIVE FINANCIAL INSTRUMENTS (Details) Sheet http://www.spx.com/role/DERIVATIVEFINANCIALINSTRUMENTSDetails DERIVATIVE FINANCIAL INSTRUMENTS (Details) Details http://www.spx.com/role/DERIVATIVEFINANCIALINSTRUMENTS 63 false false R64.htm 9954508 - Disclosure - STOCKHOLDERS' EQUITY AND LONG-TERM INCENTIVE COMPENSATION - Components Used For Calculation Of Basic And Diluted Income (Details) Sheet http://www.spx.com/role/STOCKHOLDERSEQUITYANDLONGTERMINCENTIVECOMPENSATIONComponentsUsedForCalculationOfBasicAndDilutedIncomeDetails STOCKHOLDERS' EQUITY AND LONG-TERM INCENTIVE COMPENSATION - Components Used For Calculation Of Basic And Diluted Income (Details) Details 64 false false R65.htm 9954509 - Disclosure - STOCKHOLDERS' EQUITY AND LONG-TERM INCENTIVE COMPENSATION - Income Per Share (Details) (Details) Sheet http://www.spx.com/role/STOCKHOLDERSEQUITYANDLONGTERMINCENTIVECOMPENSATIONIncomePerShareDetailsDetails STOCKHOLDERS' EQUITY AND LONG-TERM INCENTIVE COMPENSATION - Income Per Share (Details) (Details) Details 65 false false R66.htm 9954510 - Disclosure - STOCKHOLDERS' EQUITY AND LONG-TERM INCENTIVE COMPENSATION - Long Term Incentive Compensation (Details) Sheet http://www.spx.com/role/STOCKHOLDERSEQUITYANDLONGTERMINCENTIVECOMPENSATIONLongTermIncentiveCompensationDetails STOCKHOLDERS' EQUITY AND LONG-TERM INCENTIVE COMPENSATION - Long Term Incentive Compensation (Details) Details 66 false false R67.htm 9954511 - Disclosure - STOCKHOLDERS' EQUITY AND LONG-TERM INCENTIVE COMPENSATION - PSU's, RSU's (Details) Sheet http://www.spx.com/role/STOCKHOLDERSEQUITYANDLONGTERMINCENTIVECOMPENSATIONPSUsRSUsDetails STOCKHOLDERS' EQUITY AND LONG-TERM INCENTIVE COMPENSATION - PSU's, RSU's (Details) Details 67 false false R68.htm 9954512 - Disclosure - STOCKHOLDERS' EQUITY AND LONG-TERM INCENTIVE COMPENSATION - PSU's, RSU's Narrative (Details) Sheet http://www.spx.com/role/STOCKHOLDERSEQUITYANDLONGTERMINCENTIVECOMPENSATIONPSUsRSUsNarrativeDetails STOCKHOLDERS' EQUITY AND LONG-TERM INCENTIVE COMPENSATION - PSU's, RSU's Narrative (Details) Details 68 false false R69.htm 9954513 - Disclosure - STOCKHOLDERS' EQUITY AND LONG-TERM INCENTIVE COMPENSATION - Stock Options - Narrative (Details) Sheet http://www.spx.com/role/STOCKHOLDERSEQUITYANDLONGTERMINCENTIVECOMPENSATIONStockOptionsNarrativeDetails STOCKHOLDERS' EQUITY AND LONG-TERM INCENTIVE COMPENSATION - Stock Options - Narrative (Details) Details 69 false false R70.htm 9954514 - Disclosure - STOCKHOLDERS' EQUITY AND LONG-TERM INCENTIVE COMPENSATION - Black-Scholes Option-Pricing Model (Details) Sheet http://www.spx.com/role/STOCKHOLDERSEQUITYANDLONGTERMINCENTIVECOMPENSATIONBlackScholesOptionPricingModelDetails STOCKHOLDERS' EQUITY AND LONG-TERM INCENTIVE COMPENSATION - Black-Scholes Option-Pricing Model (Details) Details 70 false false R71.htm 9954515 - Disclosure - STOCKHOLDERS' EQUITY AND LONG-TERM INCENTIVE COMPENSATION - Stock Options (Details) Sheet http://www.spx.com/role/STOCKHOLDERSEQUITYANDLONGTERMINCENTIVECOMPENSATIONStockOptionsDetails STOCKHOLDERS' EQUITY AND LONG-TERM INCENTIVE COMPENSATION - Stock Options (Details) Details 71 false false R72.htm 9954516 - Disclosure - STOCKHOLDERS' EQUITY AND LONG-TERM INCENTIVE COMPENSATION - Accumulated Other Comprehensive Income (Details) Sheet http://www.spx.com/role/STOCKHOLDERSEQUITYANDLONGTERMINCENTIVECOMPENSATIONAccumulatedOtherComprehensiveIncomeDetails STOCKHOLDERS' EQUITY AND LONG-TERM INCENTIVE COMPENSATION - Accumulated Other Comprehensive Income (Details) Details 72 false false R73.htm 9954517 - Disclosure - STOCKHOLDERS' EQUITY AND LONG-TERM INCENTIVE COMPENSATION - Components of AOCI (Details) Sheet http://www.spx.com/role/STOCKHOLDERSEQUITYANDLONGTERMINCENTIVECOMPENSATIONComponentsofAOCIDetails STOCKHOLDERS' EQUITY AND LONG-TERM INCENTIVE COMPENSATION - Components of AOCI (Details) Details 73 false false R74.htm 9954518 - Disclosure - CONTINGENT LIABILITIES AND OTHER MATTERS - General (Details) Sheet http://www.spx.com/role/CONTINGENTLIABILITIESANDOTHERMATTERSGeneralDetails CONTINGENT LIABILITIES AND OTHER MATTERS - General (Details) Details http://www.spx.com/role/CONTINGENTLIABILITIESANDOTHERMATTERS 74 false false R75.htm 9954519 - Disclosure - CONTINGENT LIABILITIES AND OTHER MATTERS - Large Power Projects in South Africa (Details) Sheet http://www.spx.com/role/CONTINGENTLIABILITIESANDOTHERMATTERSLargePowerProjectsinSouthAfricaDetails CONTINGENT LIABILITIES AND OTHER MATTERS - Large Power Projects in South Africa (Details) Details 75 false false R76.htm 9954520 - Disclosure - CONTINGENT LIABILITIES AND OTHER MATTERS - Claim for Contingent Consideration related to ULC (Details) Sheet http://www.spx.com/role/CONTINGENTLIABILITIESANDOTHERMATTERSClaimforContingentConsiderationrelatedtoULCDetails CONTINGENT LIABILITIES AND OTHER MATTERS - Claim for Contingent Consideration related to ULC (Details) Details 76 false false R77.htm 9954521 - Disclosure - CONTINGENT LIABILITIES AND OTHER MATTERS - Resulution of DisputeContingent Consideration related to ULC (Details) Sheet http://www.spx.com/role/CONTINGENTLIABILITIESANDOTHERMATTERSResulutionofDisputeContingentConsiderationrelatedtoULCDetails CONTINGENT LIABILITIES AND OTHER MATTERS - Resulution of DisputeContingent Consideration related to ULC (Details) Details 77 false false R78.htm 9954522 - Disclosure - CONTINGENT LIABILITIES AND OTHER MATTERS - Environmental Matters (Details) Sheet http://www.spx.com/role/CONTINGENTLIABILITIESANDOTHERMATTERSEnvironmentalMattersDetails CONTINGENT LIABILITIES AND OTHER MATTERS - Environmental Matters (Details) Details 78 false false R79.htm 9954523 - Disclosure - INCOME AND OTHER TAXES (Details) Sheet http://www.spx.com/role/INCOMEANDOTHERTAXESDetails INCOME AND OTHER TAXES (Details) Details http://www.spx.com/role/INCOMEANDOTHERTAXES 79 false false R80.htm 9954524 - Disclosure - FAIR VALUE (Details) Sheet http://www.spx.com/role/FAIRVALUEDetails FAIR VALUE (Details) Details http://www.spx.com/role/FAIRVALUE 80 false false All Reports Book All Reports [ix-0514-Hidden-Fact-Eligible-For-Transform] WARN: 1 fact(s) appearing in ix:hidden were eligible for transformation: ecd:TrdArrDuration - spxc-20240330.htm 4 spxc-20240330.htm spxc-20240330.xsd spxc-20240330_cal.xml spxc-20240330_def.xml spxc-20240330_lab.xml spxc-20240330_pre.xml http://fasb.org/us-gaap/2023 http://xbrl.sec.gov/dei/2023 http://xbrl.sec.gov/ecd/2023 true true