3.26.1 html 189 305 1 false 69 0 false 6 false false R1.htm 0000001 - Document - Cover Page Sheet http://www.labcorp.com/role/CoverPage Cover Page Cover 1 false false R2.htm 9952151 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) Sheet http://www.labcorp.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETSUnaudited CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) Statements 2 false false R3.htm 9952152 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parentheticals) Sheet http://www.labcorp.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETSUnauditedParentheticals CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parentheticals) Statements 3 false false R4.htm 9952153 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) Sheet http://www.labcorp.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONSUnaudited CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) Statements 4 false false R5.htm 9952154 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE EARNINGS (Unaudited) Sheet http://www.labcorp.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEEARNINGSUnaudited CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE EARNINGS (Unaudited) Statements 5 false false R6.htm 9952155 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Unaudited) Sheet http://www.labcorp.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSEQUITYUnaudited CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Unaudited) Statements 6 false false R7.htm 9952156 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) Sheet http://www.labcorp.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWSUnaudited CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) Statements 7 false false R8.htm 9952157 - Disclosure - BASIS OF FINANCIAL STATEMENT PRESENTATION Sheet http://www.labcorp.com/role/BASISOFFINANCIALSTATEMENTPRESENTATION BASIS OF FINANCIAL STATEMENT PRESENTATION Notes 8 false false R9.htm 9952158 - Disclosure - REVENUES Sheet http://www.labcorp.com/role/REVENUES REVENUES Notes 9 false false R10.htm 9952159 - Disclosure - BUSINESS ACQUISITIONS Sheet http://www.labcorp.com/role/BUSINESSACQUISITIONS BUSINESS ACQUISITIONS Notes 10 false false R11.htm 9952160 - Disclosure - EARNINGS PER SHARE Sheet http://www.labcorp.com/role/EARNINGSPERSHARE EARNINGS PER SHARE Notes 11 false false R12.htm 9952161 - Disclosure - GOODWILL AND INTANGIBLE ASSETS Sheet http://www.labcorp.com/role/GOODWILLANDINTANGIBLEASSETS GOODWILL AND INTANGIBLE ASSETS Notes 12 false false R13.htm 9952162 - Disclosure - DEBT Sheet http://www.labcorp.com/role/DEBT DEBT Notes 13 false false R14.htm 9952163 - Disclosure - PREFERRED STOCK AND COMMON SHAREHOLDERS' EQUITY Sheet http://www.labcorp.com/role/PREFERREDSTOCKANDCOMMONSHAREHOLDERSEQUITY PREFERRED STOCK AND COMMON SHAREHOLDERS' EQUITY Notes 14 false false R15.htm 9952164 - Disclosure - COMMITMENTS AND CONTINGENCIES Sheet http://www.labcorp.com/role/COMMITMENTSANDCONTINGENCIES COMMITMENTS AND CONTINGENCIES Notes 15 false false R16.htm 9952165 - Disclosure - FAIR VALUE MEASUREMENTS AND DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES Sheet http://www.labcorp.com/role/FAIRVALUEMEASUREMENTSANDDERIVATIVEINSTRUMENTSANDHEDGINGACTIVITIES FAIR VALUE MEASUREMENTS AND DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES Notes 16 false false R17.htm 9952167 - Disclosure - SUPPLEMENTAL CASH FLOW INFORMATION Sheet http://www.labcorp.com/role/SUPPLEMENTALCASHFLOWINFORMATION SUPPLEMENTAL CASH FLOW INFORMATION Notes 17 false false R18.htm 9952168 - Disclosure - BUSINESS SEGMENT INFORMATION Sheet http://www.labcorp.com/role/BUSINESSSEGMENTINFORMATION BUSINESS SEGMENT INFORMATION Notes 18 false false R19.htm 995445 - Disclosure - Insider Trading Arrangements Sheet http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements Insider Trading Arrangements Notes 19 false false R20.htm 9955511 - Disclosure - BASIS OF FINANCIAL STATEMENT PRESENTATION (Policies) Sheet http://www.labcorp.com/role/BASISOFFINANCIALSTATEMENTPRESENTATIONPolicies BASIS OF FINANCIAL STATEMENT PRESENTATION (Policies) Policies 20 false false R21.htm 9955512 - Disclosure - EARNINGS PER SHARE (Policies) Sheet http://www.labcorp.com/role/EARNINGSPERSHAREPolicies EARNINGS PER SHARE (Policies) Policies 21 false false R22.htm 9955513 - Disclosure - REVENUES (Tables) Sheet http://www.labcorp.com/role/REVENUESTables REVENUES (Tables) Tables http://www.labcorp.com/role/REVENUES 22 false false R23.htm 9955514 - Disclosure - BUSINESS ACQUISITIONS (Tables) Sheet http://www.labcorp.com/role/BUSINESSACQUISITIONSTables BUSINESS ACQUISITIONS (Tables) Tables http://www.labcorp.com/role/BUSINESSACQUISITIONS 23 false false R24.htm 9955515 - Disclosure - EARNINGS PER SHARE (Tables) Sheet http://www.labcorp.com/role/EARNINGSPERSHARETables EARNINGS PER SHARE (Tables) Tables http://www.labcorp.com/role/EARNINGSPERSHARE 24 false false R25.htm 9955516 - Disclosure - GOODWILL AND INTANGIBLE ASSETS (Tables) Sheet http://www.labcorp.com/role/GOODWILLANDINTANGIBLEASSETSTables GOODWILL AND INTANGIBLE ASSETS (Tables) Tables http://www.labcorp.com/role/GOODWILLANDINTANGIBLEASSETS 25 false false R26.htm 9955517 - Disclosure - DEBT (Tables) Sheet http://www.labcorp.com/role/DEBTTables DEBT (Tables) Tables http://www.labcorp.com/role/DEBT 26 false false R27.htm 9955518 - Disclosure - PREFERRED STOCK AND COMMON SHAREHOLDERS' EQUITY (Tables) Sheet http://www.labcorp.com/role/PREFERREDSTOCKANDCOMMONSHAREHOLDERSEQUITYTables PREFERRED STOCK AND COMMON SHAREHOLDERS' EQUITY (Tables) Tables http://www.labcorp.com/role/PREFERREDSTOCKANDCOMMONSHAREHOLDERSEQUITY 27 false false R28.htm 9955519 - Disclosure - FAIR VALUE MEASUREMENTS AND DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Tables) Sheet http://www.labcorp.com/role/FAIRVALUEMEASUREMENTSANDDERIVATIVEINSTRUMENTSANDHEDGINGACTIVITIESTables FAIR VALUE MEASUREMENTS AND DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Tables) Tables http://www.labcorp.com/role/FAIRVALUEMEASUREMENTSANDDERIVATIVEINSTRUMENTSANDHEDGINGACTIVITIES 28 false false R29.htm 9955520 - Disclosure - SUPPLEMENTAL CASH FLOW INFORMATION (Tables) Sheet http://www.labcorp.com/role/SUPPLEMENTALCASHFLOWINFORMATIONTables SUPPLEMENTAL CASH FLOW INFORMATION (Tables) Tables http://www.labcorp.com/role/SUPPLEMENTALCASHFLOWINFORMATION 29 false false R30.htm 9955521 - Disclosure - BUSINESS SEGMENT INFORMATION (Tables) Sheet http://www.labcorp.com/role/BUSINESSSEGMENTINFORMATIONTables BUSINESS SEGMENT INFORMATION (Tables) Tables http://www.labcorp.com/role/BUSINESSSEGMENTINFORMATION 30 false false R31.htm 9955522 - Disclosure - BASIS OF FINANCIAL STATEMENT PRESENTATION (Details) Sheet http://www.labcorp.com/role/BASISOFFINANCIALSTATEMENTPRESENTATIONDetails BASIS OF FINANCIAL STATEMENT PRESENTATION (Details) Details http://www.labcorp.com/role/BASISOFFINANCIALSTATEMENTPRESENTATIONPolicies 31 false false R32.htm 9955523 - Disclosure - REVENUES Disaggregated Revenue Table (Details) Sheet http://www.labcorp.com/role/REVENUESDisaggregatedRevenueTableDetails REVENUES Disaggregated Revenue Table (Details) Details 32 false false R33.htm 9955524 - Disclosure - REVENUES (Details) Sheet http://www.labcorp.com/role/REVENUESDetails REVENUES (Details) Details http://www.labcorp.com/role/REVENUESTables 33 false false R34.htm 9955525 - Disclosure - BUSINESS ACQUISITIONS (Details) Sheet http://www.labcorp.com/role/BUSINESSACQUISITIONSDetails BUSINESS ACQUISITIONS (Details) Details http://www.labcorp.com/role/BUSINESSACQUISITIONSTables 34 false false R35.htm 9955526 - Disclosure - EARNINGS PER SHARE (Reconciliation of Basic Earnings Per Share to Diluted Earnings Per Share) (Details) Sheet http://www.labcorp.com/role/EARNINGSPERSHAREReconciliationofBasicEarningsPerSharetoDilutedEarningsPerShareDetails EARNINGS PER SHARE (Reconciliation of Basic Earnings Per Share to Diluted Earnings Per Share) (Details) Details http://www.labcorp.com/role/EARNINGSPERSHARETables 35 false false R36.htm 9955527 - Disclosure - EARNINGS PER SHARE (Potential common shares not included in computation of diluted earnings per share) (Details) Sheet http://www.labcorp.com/role/EARNINGSPERSHAREPotentialcommonsharesnotincludedincomputationofdilutedearningspershareDetails EARNINGS PER SHARE (Potential common shares not included in computation of diluted earnings per share) (Details) Details http://www.labcorp.com/role/EARNINGSPERSHARETables 36 false false R37.htm 9955528 - Disclosure - GOODWILL AND INTANGIBLE ASSETS (Changes in Carrying Amount of Goodwill) (Details) Sheet http://www.labcorp.com/role/GOODWILLANDINTANGIBLEASSETSChangesinCarryingAmountofGoodwillDetails GOODWILL AND INTANGIBLE ASSETS (Changes in Carrying Amount of Goodwill) (Details) Details http://www.labcorp.com/role/GOODWILLANDINTANGIBLEASSETSTables 37 false false R38.htm 9955529 - Disclosure - GOODWILL AND INTANGIBLE ASSETS (Components of identifiable intangible assets) (Details) Sheet http://www.labcorp.com/role/GOODWILLANDINTANGIBLEASSETSComponentsofidentifiableintangibleassetsDetails GOODWILL AND INTANGIBLE ASSETS (Components of identifiable intangible assets) (Details) Details http://www.labcorp.com/role/GOODWILLANDINTANGIBLEASSETSTables 38 false false R39.htm 9955530 - Disclosure - GOODWILL AND INTANGIBLE ASSETS (Details) Sheet http://www.labcorp.com/role/GOODWILLANDINTANGIBLEASSETSDetails GOODWILL AND INTANGIBLE ASSETS (Details) Details http://www.labcorp.com/role/GOODWILLANDINTANGIBLEASSETSTables 39 false false R40.htm 9955531 - Disclosure - DEBT (Short-term borrowings and current portion of long-term debt) (Table) (Details) Sheet http://www.labcorp.com/role/DEBTShorttermborrowingsandcurrentportionoflongtermdebtTableDetails DEBT (Short-term borrowings and current portion of long-term debt) (Table) (Details) Details http://www.labcorp.com/role/DEBTTables 40 false false R41.htm 9955532 - Disclosure - DEBT (Long-term debt) (Details) Sheet http://www.labcorp.com/role/DEBTLongtermdebtDetails DEBT (Long-term debt) (Details) Details http://www.labcorp.com/role/DEBTTables 41 false false R42.htm 9955533 - Disclosure - DEBT (Credit Facilities) (Details) Sheet http://www.labcorp.com/role/DEBTCreditFacilitiesDetails DEBT (Credit Facilities) (Details) Details http://www.labcorp.com/role/DEBTTables 42 false false R43.htm 9955534 - Disclosure - PREFERRED STOCK AND COMMON SHAREHOLDERS' EQUITY (Details) Sheet http://www.labcorp.com/role/PREFERREDSTOCKANDCOMMONSHAREHOLDERSEQUITYDetails PREFERRED STOCK AND COMMON SHAREHOLDERS' EQUITY (Details) Details http://www.labcorp.com/role/PREFERREDSTOCKANDCOMMONSHAREHOLDERSEQUITYTables 43 false false R44.htm 9955535 - Disclosure - PREFERRED STOCK AND COMMON SHAREHOLDERS' EQUITY PREFERRED STOCK AND COMMON SHAREHOLDERS' EQUITY - Accumulated Other Comprehensive Earnings (Details) Sheet http://www.labcorp.com/role/PREFERREDSTOCKANDCOMMONSHAREHOLDERSEQUITYPREFERREDSTOCKANDCOMMONSHAREHOLDERSEQUITYAccumulatedOtherComprehensiveEarningsDetails PREFERRED STOCK AND COMMON SHAREHOLDERS' EQUITY PREFERRED STOCK AND COMMON SHAREHOLDERS' EQUITY - Accumulated Other Comprehensive Earnings (Details) Details 44 false false R45.htm 9955536 - Disclosure - COMMITMENTS AND CONTINGENCIES (Details) Sheet http://www.labcorp.com/role/COMMITMENTSANDCONTINGENCIESDetails COMMITMENTS AND CONTINGENCIES (Details) Details http://www.labcorp.com/role/COMMITMENTSANDCONTINGENCIES 45 false false R46.htm 9955537 - Disclosure - FAIR VALUE MEASUREMENTS AND DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Details) Sheet http://www.labcorp.com/role/FAIRVALUEMEASUREMENTSANDDERIVATIVEINSTRUMENTSANDHEDGINGACTIVITIESDetails FAIR VALUE MEASUREMENTS AND DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Details) Details http://www.labcorp.com/role/FAIRVALUEMEASUREMENTSANDDERIVATIVEINSTRUMENTSANDHEDGINGACTIVITIESTables 46 false false R47.htm 9955538 - Disclosure - DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Effects of Interest Rate Swap on Other Comprehensive Income) (Details) Sheet http://www.labcorp.com/role/DERIVATIVEINSTRUMENTSANDHEDGINGACTIVITIESEffectsofInterestRateSwaponOtherComprehensiveIncomeDetails DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Effects of Interest Rate Swap on Other Comprehensive Income) (Details) Details 47 false false R48.htm 9955540 - Disclosure - SUPPLEMENTAL CASH FLOW INFORMATION Description Information (Details) Sheet http://www.labcorp.com/role/SUPPLEMENTALCASHFLOWINFORMATIONDescriptionInformationDetails SUPPLEMENTAL CASH FLOW INFORMATION Description Information (Details) Details 48 false false R49.htm 9955541 - Disclosure - BUSINESS SEGMENT INFORMATION (Details) Sheet http://www.labcorp.com/role/BUSINESSSEGMENTINFORMATIONDetails BUSINESS SEGMENT INFORMATION (Details) Details http://www.labcorp.com/role/BUSINESSSEGMENTINFORMATIONTables 49 false false All Reports Book All Reports lh-20260331.htm lh-20260331.xsd lh-20260331_cal.xml lh-20260331_def.xml lh-20260331_lab.xml lh-20260331_pre.xml lh-20260331_g1.jpg http://fasb.org/us-gaap/2026 http://xbrl.sec.gov/dei/2026 http://xbrl.sec.gov/ecd/2026 true true