3.25.3 html 469 288 1 false 121 0 false 5 false false R1.htm 0000001 - Document - Document and Entity Information Sheet http://www.alticeusa.com/role/DocumentandEntityInformation Document and Entity Information Cover 1 false false R2.htm 9952151 - Statement - CONSOLIDATED BALANCE SHEETS Sheet http://www.alticeusa.com/role/CONSOLIDATEDBALANCESHEETS CONSOLIDATED BALANCE SHEETS Statements 2 false false R3.htm 9952152 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical) Sheet http://www.alticeusa.com/role/CONSOLIDATEDBALANCESHEETSParenthetical CONSOLIDATED BALANCE SHEETS (Parenthetical) Statements 3 false false R4.htm 9952153 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS Sheet http://www.alticeusa.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS CONSOLIDATED STATEMENTS OF OPERATIONS Statements 4 false false R5.htm 9952154 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS (Parenthetical) Sheet http://www.alticeusa.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONSParenthetical CONSOLIDATED STATEMENTS OF OPERATIONS (Parenthetical) Statements 5 false false R6.htm 9952155 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) Sheet http://www.alticeusa.com/role/CONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOMELOSS CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) Statements 6 false false R7.htm 9952156 - Statement - CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY Sheet http://www.alticeusa.com/role/CONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITY CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY Statements 7 false false R8.htm 9952157 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS Sheet http://www.alticeusa.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS CONSOLIDATED STATEMENTS OF CASH FLOWS Statements 8 false false R9.htm 9952158 - Statement - CSC HOLDINGS - CONSOLIDATED BALANCE SHEETS Sheet http://www.alticeusa.com/role/CSCHOLDINGSCONSOLIDATEDBALANCESHEETS CSC HOLDINGS - CONSOLIDATED BALANCE SHEETS Statements 9 false false R10.htm 9952159 - Statement - CSC HOLDINGS - CONSOLIDATED BALANCE SHEETS (Parentheticals) Sheet http://www.alticeusa.com/role/CSCHOLDINGSCONSOLIDATEDBALANCESHEETSParentheticals CSC HOLDINGS - CONSOLIDATED BALANCE SHEETS (Parentheticals) Statements 10 false false R11.htm 9952160 - Statement - CSC HOLDINGS - CONSOLIDATED STATEMENT OF OPERATIONS Sheet http://www.alticeusa.com/role/CSCHOLDINGSCONSOLIDATEDSTATEMENTOFOPERATIONS CSC HOLDINGS - CONSOLIDATED STATEMENT OF OPERATIONS Statements 11 false false R12.htm 9952161 - Statement - CSC HOLDINGS - CONSOLIDATED STATEMENT OF OPERATIONS (Parenthetical) Sheet http://www.alticeusa.com/role/CSCHOLDINGSCONSOLIDATEDSTATEMENTOFOPERATIONSParenthetical CSC HOLDINGS - CONSOLIDATED STATEMENT OF OPERATIONS (Parenthetical) Statements 12 false false R13.htm 9952162 - Statement - CSC HOLDINGS - CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) Sheet http://www.alticeusa.com/role/CSCHOLDINGSCONDENSEDCONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOMELOSS CSC HOLDINGS - CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) Statements 13 false false R14.htm 9952163 - Statement - CSC HOLDINGS - CONSOLIDATED STATEMENT OF MEMBER'S EQUITY Sheet http://www.alticeusa.com/role/CSCHOLDINGSCONSOLIDATEDSTATEMENTOFMEMBERSEQUITY CSC HOLDINGS - CONSOLIDATED STATEMENT OF MEMBER'S EQUITY Statements 14 false false R15.htm 9952164 - Statement - CSC HOLDINGS - CONSOLIDATED STATEMENT OF CASH FLOWS Sheet http://www.alticeusa.com/role/CSCHOLDINGSCONSOLIDATEDSTATEMENTOFCASHFLOWS CSC HOLDINGS - CONSOLIDATED STATEMENT OF CASH FLOWS Statements 15 false false R16.htm 9952165 - Disclosure - DESCRIPTION OF BUSINESS AND RELATED MATTERS Sheet http://www.alticeusa.com/role/DESCRIPTIONOFBUSINESSANDRELATEDMATTERS DESCRIPTION OF BUSINESS AND RELATED MATTERS Notes 16 false false R17.htm 9952166 - Disclosure - BASIS OF PRESENTATION Sheet http://www.alticeusa.com/role/BASISOFPRESENTATION BASIS OF PRESENTATION Notes 17 false false R18.htm 9952167 - Disclosure - Accounting Policies Sheet http://www.alticeusa.com/role/AccountingPolicies Accounting Policies Notes 18 false false R19.htm 9952168 - Disclosure - Revenue Recognition and Deferred Revenue Sheet http://www.alticeusa.com/role/RevenueRecognitionandDeferredRevenue Revenue Recognition and Deferred Revenue Notes 19 false false R20.htm 9952169 - Disclosure - Earnings Per Share Sheet http://www.alticeusa.com/role/EarningsPerShare Earnings Per Share Notes 20 false false R21.htm 9952170 - Disclosure - SUPPLEMENTAL CASH FLOW INFORMATION Sheet http://www.alticeusa.com/role/SUPPLEMENTALCASHFLOWINFORMATION SUPPLEMENTAL CASH FLOW INFORMATION Notes 21 false false R22.htm 9952171 - Disclosure - RESTRUCTURING AND OTHER EXPENSE Sheet http://www.alticeusa.com/role/RESTRUCTURINGANDOTHEREXPENSE RESTRUCTURING AND OTHER EXPENSE Notes 22 false false R23.htm 9952172 - Disclosure - INTANGIBLE ASSETS Sheet http://www.alticeusa.com/role/INTANGIBLEASSETS INTANGIBLE ASSETS Notes 23 false false R24.htm 9952173 - Disclosure - DEBT Sheet http://www.alticeusa.com/role/DEBT DEBT Notes 24 false false R25.htm 9952174 - Disclosure - DERIVATIVE CONTRACTS AND COLLATERALIZED INDEBTEDNESS Sheet http://www.alticeusa.com/role/DERIVATIVECONTRACTSANDCOLLATERALIZEDINDEBTEDNESS DERIVATIVE CONTRACTS AND COLLATERALIZED INDEBTEDNESS Notes 25 false false R26.htm 9952175 - Disclosure - FAIR VALUE MEASUREMENT Sheet http://www.alticeusa.com/role/FAIRVALUEMEASUREMENT FAIR VALUE MEASUREMENT Notes 26 false false R27.htm 9952176 - Disclosure - INCOME TAXES Sheet http://www.alticeusa.com/role/INCOMETAXES INCOME TAXES Notes 27 false false R28.htm 9952177 - Disclosure - SHARE-BASED COMPENSATION Sheet http://www.alticeusa.com/role/SHAREBASEDCOMPENSATION SHARE-BASED COMPENSATION Notes 28 false false R29.htm 9952178 - Disclosure - AFFILIATE AND RELATED PARTY TRANSACTIONS Sheet http://www.alticeusa.com/role/AFFILIATEANDRELATEDPARTYTRANSACTIONS AFFILIATE AND RELATED PARTY TRANSACTIONS Notes 29 false false R30.htm 9952179 - Disclosure - COMMITMENTS AND CONTINGENCIES Sheet http://www.alticeusa.com/role/COMMITMENTSANDCONTINGENCIES COMMITMENTS AND CONTINGENCIES Notes 30 false false R31.htm 9952180 - Disclosure - Segment Reporting Sheet http://www.alticeusa.com/role/SegmentReporting Segment Reporting Notes 31 false false R32.htm 9952181 - Disclosure - SUPPLEMENTAL SCHEDULES Sheet http://www.alticeusa.com/role/SUPPLEMENTALSCHEDULES SUPPLEMENTAL SCHEDULES Notes 32 false false R33.htm 9952182 - Disclosure - Subsequent Events Sheet http://www.alticeusa.com/role/SubsequentEvents Subsequent Events Notes 33 false false R34.htm 9955511 - Disclosure - Accounting Policies (Policies) Sheet http://www.alticeusa.com/role/AccountingPoliciesPolicies Accounting Policies (Policies) Policies http://www.alticeusa.com/role/AccountingPolicies 34 false false R35.htm 9955512 - Disclosure - Revenue Recognition and Deferred Revenue (Tables) Sheet http://www.alticeusa.com/role/RevenueRecognitionandDeferredRevenueTables Revenue Recognition and Deferred Revenue (Tables) Tables http://www.alticeusa.com/role/RevenueRecognitionandDeferredRevenue 35 false false R36.htm 9955513 - Disclosure - SUPPLEMENTAL CASH FLOW INFORMATION (Tables) Sheet http://www.alticeusa.com/role/SUPPLEMENTALCASHFLOWINFORMATIONTables SUPPLEMENTAL CASH FLOW INFORMATION (Tables) Tables http://www.alticeusa.com/role/SUPPLEMENTALCASHFLOWINFORMATION 36 false false R37.htm 9955514 - Disclosure - RESTRUCTURING AND OTHER EXPENSE (Tables) Sheet http://www.alticeusa.com/role/RESTRUCTURINGANDOTHEREXPENSETables RESTRUCTURING AND OTHER EXPENSE (Tables) Tables http://www.alticeusa.com/role/RESTRUCTURINGANDOTHEREXPENSE 37 false false R38.htm 9955515 - Disclosure - INTANGIBLE ASSETS (Tables) Sheet http://www.alticeusa.com/role/INTANGIBLEASSETSTables INTANGIBLE ASSETS (Tables) Tables http://www.alticeusa.com/role/INTANGIBLEASSETS 38 false false R39.htm 9955516 - Disclosure - DEBT (Tables) Sheet http://www.alticeusa.com/role/DEBTTables DEBT (Tables) Tables http://www.alticeusa.com/role/DEBT 39 false false R40.htm 9955517 - Disclosure - DERIVATIVE CONTRACTS AND COLLATERALIZED INDEBTEDNESS (Tables) Sheet http://www.alticeusa.com/role/DERIVATIVECONTRACTSANDCOLLATERALIZEDINDEBTEDNESSTables DERIVATIVE CONTRACTS AND COLLATERALIZED INDEBTEDNESS (Tables) Tables http://www.alticeusa.com/role/DERIVATIVECONTRACTSANDCOLLATERALIZEDINDEBTEDNESS 40 false false R41.htm 9955518 - Disclosure - FAIR VALUE MEASUREMENT (Tables) Sheet http://www.alticeusa.com/role/FAIRVALUEMEASUREMENTTables FAIR VALUE MEASUREMENT (Tables) Tables http://www.alticeusa.com/role/FAIRVALUEMEASUREMENT 41 false false R42.htm 9955519 - Disclosure - SHARE-BASED COMPENSATION (Tables) Sheet http://www.alticeusa.com/role/SHAREBASEDCOMPENSATIONTables SHARE-BASED COMPENSATION (Tables) Tables http://www.alticeusa.com/role/SHAREBASEDCOMPENSATION 42 false false R43.htm 9955520 - Disclosure - AFFILIATE AND RELATED PARTY TRANSACTIONS (Tables) Sheet http://www.alticeusa.com/role/AFFILIATEANDRELATEDPARTYTRANSACTIONSTables AFFILIATE AND RELATED PARTY TRANSACTIONS (Tables) Tables http://www.alticeusa.com/role/AFFILIATEANDRELATEDPARTYTRANSACTIONS 43 false false R44.htm 9955521 - Disclosure - Segment Reporting (Tables) Sheet http://www.alticeusa.com/role/SegmentReportingTables Segment Reporting (Tables) Tables http://www.alticeusa.com/role/SegmentReporting 44 false false R45.htm 9955522 - Disclosure - SUPPLEMENTAL SCHEDULES (Tables) Sheet http://www.alticeusa.com/role/SUPPLEMENTALSCHEDULESTables SUPPLEMENTAL SCHEDULES (Tables) Tables http://www.alticeusa.com/role/SUPPLEMENTALSCHEDULES 45 false false R46.htm 9955524 - Disclosure - DESCRIPTION OF BUSINESS AND RELATED MATTERS (Details) Sheet http://www.alticeusa.com/role/DESCRIPTIONOFBUSINESSANDRELATEDMATTERSDetails DESCRIPTION OF BUSINESS AND RELATED MATTERS (Details) Details http://www.alticeusa.com/role/DESCRIPTIONOFBUSINESSANDRELATEDMATTERS 46 false false R47.htm 9955525 - Disclosure - Revenue Recognition and Deferred Revenue (Details) Sheet http://www.alticeusa.com/role/RevenueRecognitionandDeferredRevenueDetails Revenue Recognition and Deferred Revenue (Details) Details http://www.alticeusa.com/role/RevenueRecognitionandDeferredRevenueTables 47 false false R48.htm 9955526 - Disclosure - SUPPLEMENTAL CASH FLOW INFORMATION - Noncash Investing and Financing Activities and Other Supplemental Data (Details) Sheet http://www.alticeusa.com/role/SUPPLEMENTALCASHFLOWINFORMATIONNoncashInvestingandFinancingActivitiesandOtherSupplementalDataDetails SUPPLEMENTAL CASH FLOW INFORMATION - Noncash Investing and Financing Activities and Other Supplemental Data (Details) Details 48 false false R49.htm 9955527 - Disclosure - SUPPLEMENTAL CASH FLOW INFORMATION - Reconciliation of Cash, Cash Equivalents and Restricted Cash (Details) Sheet http://www.alticeusa.com/role/SUPPLEMENTALCASHFLOWINFORMATIONReconciliationofCashCashEquivalentsandRestrictedCashDetails SUPPLEMENTAL CASH FLOW INFORMATION - Reconciliation of Cash, Cash Equivalents and Restricted Cash (Details) Details 49 false false R50.htm 9955528 - Disclosure - RESTRUCTURING AND OTHER EXPENSE (Details) Sheet http://www.alticeusa.com/role/RESTRUCTURINGANDOTHEREXPENSEDetails RESTRUCTURING AND OTHER EXPENSE (Details) Details http://www.alticeusa.com/role/RESTRUCTURINGANDOTHEREXPENSETables 50 false false R51.htm 9955529 - Disclosure - INTANGIBLE ASSETS - Summary of Acquired Intangible Assets (Details) Sheet http://www.alticeusa.com/role/INTANGIBLEASSETSSummaryofAcquiredIntangibleAssetsDetails INTANGIBLE ASSETS - Summary of Acquired Intangible Assets (Details) Details 51 false false R52.htm 9955530 - Disclosure - INTANGIBLE ASSETS - Narrative (Details) Sheet http://www.alticeusa.com/role/INTANGIBLEASSETSNarrativeDetails INTANGIBLE ASSETS - Narrative (Details) Details 52 false false R53.htm 9955531 - Disclosure - DEBT - Credit Silo Combination (Details) Sheet http://www.alticeusa.com/role/DEBTCreditSiloCombinationDetails DEBT - Credit Silo Combination (Details) Details 53 false false R54.htm 9955532 - Disclosure - DEBT - ABS (Details) Sheet http://www.alticeusa.com/role/DEBTABSDetails DEBT - ABS (Details) Details 54 false false R55.htm 9955533 - Disclosure - DEBT - Narrative (Details) Sheet http://www.alticeusa.com/role/DEBTNarrativeDetails DEBT - Narrative (Details) Details 55 false false R56.htm 9955534 - Disclosure - DEBT - Summary of Debt Maturities (Details) Sheet http://www.alticeusa.com/role/DEBTSummaryofDebtMaturitiesDetails DEBT - Summary of Debt Maturities (Details) Details 56 false false R57.htm 9955535 - Disclosure - DERIVATIVE CONTRACTS AND COLLATERALIZED INDEBTEDNESS - Location of Assets and Liabilities Within the Consolidated Balance Sheets (Details) Sheet http://www.alticeusa.com/role/DERIVATIVECONTRACTSANDCOLLATERALIZEDINDEBTEDNESSLocationofAssetsandLiabilitiesWithintheConsolidatedBalanceSheetsDetails DERIVATIVE CONTRACTS AND COLLATERALIZED INDEBTEDNESS - Location of Assets and Liabilities Within the Consolidated Balance Sheets (Details) Details 57 false false R58.htm 9955536 - Disclosure - DERIVATIVE CONTRACTS AND COLLATERALIZED INDEBTEDNESS - Gain (Loss) Within Consolidated Statements of Operations (Details) Sheet http://www.alticeusa.com/role/DERIVATIVECONTRACTSANDCOLLATERALIZEDINDEBTEDNESSGainLossWithinConsolidatedStatementsofOperationsDetails DERIVATIVE CONTRACTS AND COLLATERALIZED INDEBTEDNESS - Gain (Loss) Within Consolidated Statements of Operations (Details) Details http://www.alticeusa.com/role/DERIVATIVECONTRACTSANDCOLLATERALIZEDINDEBTEDNESSTables 58 false false R59.htm 9955537 - Disclosure - DERIVATIVE CONTRACTS AND COLLATERALIZED INDEBTEDNESS - Schedule of Interest Rate Derivatives (Details) Sheet http://www.alticeusa.com/role/DERIVATIVECONTRACTSANDCOLLATERALIZEDINDEBTEDNESSScheduleofInterestRateDerivativesDetails DERIVATIVE CONTRACTS AND COLLATERALIZED INDEBTEDNESS - Schedule of Interest Rate Derivatives (Details) Details 59 false false R60.htm 9955538 - Disclosure - FAIR VALUE MEASUREMENT - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) Sheet http://www.alticeusa.com/role/FAIRVALUEMEASUREMENTAssetsandLiabilitiesMeasuredatFairValueonaRecurringBasisDetails FAIR VALUE MEASUREMENT - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) Details 60 false false R61.htm 9955539 - Disclosure - FAIR VALUE MEASUREMENT - Carrying Values and Estimated Fair Values of Debt Instruments (Details) Sheet http://www.alticeusa.com/role/FAIRVALUEMEASUREMENTCarryingValuesandEstimatedFairValuesofDebtInstrumentsDetails FAIR VALUE MEASUREMENT - Carrying Values and Estimated Fair Values of Debt Instruments (Details) Details 61 false false R62.htm 9955540 - Disclosure - INCOME TAXES - Income Tax Expense (Benefit) Continuing Operations (Details) Sheet http://www.alticeusa.com/role/INCOMETAXESIncomeTaxExpenseBenefitContinuingOperationsDetails INCOME TAXES - Income Tax Expense (Benefit) Continuing Operations (Details) Details 62 false false R63.htm 9955541 - Disclosure - SHARE-BASED COMPENSATION - Schedule of Share-Based Compensation Expense (Benefit) (Details) Sheet http://www.alticeusa.com/role/SHAREBASEDCOMPENSATIONScheduleofShareBasedCompensationExpenseBenefitDetails SHARE-BASED COMPENSATION - Schedule of Share-Based Compensation Expense (Benefit) (Details) Details 63 false false R64.htm 9955542 - Disclosure - SHARE-BASED COMPENSATION - Performance and Restricted Unit Award (Details) Sheet http://www.alticeusa.com/role/SHAREBASEDCOMPENSATIONPerformanceandRestrictedUnitAwardDetails SHARE-BASED COMPENSATION - Performance and Restricted Unit Award (Details) Details 64 false false R65.htm 9955543 - Disclosure - SHARE-BASED COMPENSATION - Narrative (Details) Sheet http://www.alticeusa.com/role/SHAREBASEDCOMPENSATIONNarrativeDetails SHARE-BASED COMPENSATION - Narrative (Details) Details 65 false false R66.htm 9955544 - Disclosure - AFFILIATE AND RELATED PARTY TRANSACTIONS - Revenue and Related Charges (Details) Sheet http://www.alticeusa.com/role/AFFILIATEANDRELATEDPARTYTRANSACTIONSRevenueandRelatedChargesDetails AFFILIATE AND RELATED PARTY TRANSACTIONS - Revenue and Related Charges (Details) Details 66 false false R67.htm 9955545 - Disclosure - AFFILIATE AND RELATED PARTY TRANSACTIONS - Amounts Due From and Due to Related Parties (Details) Sheet http://www.alticeusa.com/role/AFFILIATEANDRELATEDPARTYTRANSACTIONSAmountsDueFromandDuetoRelatedPartiesDetails AFFILIATE AND RELATED PARTY TRANSACTIONS - Amounts Due From and Due to Related Parties (Details) Details 67 false false R68.htm 9955546 - Disclosure - AFFILIATE AND RELATED PARTY TRANSACTIONS - Narrative (Details) Sheet http://www.alticeusa.com/role/AFFILIATEANDRELATEDPARTYTRANSACTIONSNarrativeDetails AFFILIATE AND RELATED PARTY TRANSACTIONS - Narrative (Details) Details 68 false false R69.htm 9955547 - Disclosure - COMMITMENTS AND CONTINGENCIES - Narrative (Details) Sheet http://www.alticeusa.com/role/COMMITMENTSANDCONTINGENCIESNarrativeDetails COMMITMENTS AND CONTINGENCIES - Narrative (Details) Details 69 false false R70.htm 9955548 - Disclosure - Segment Reporting (Details) Sheet http://www.alticeusa.com/role/SegmentReportingDetails Segment Reporting (Details) Details http://www.alticeusa.com/role/SegmentReportingTables 70 false false R71.htm 9955549 - Disclosure - SUPPLEMENTAL SCHEDULES (Details) Sheet http://www.alticeusa.com/role/SUPPLEMENTALSCHEDULESDetails SUPPLEMENTAL SCHEDULES (Details) Details http://www.alticeusa.com/role/SUPPLEMENTALSCHEDULESTables 71 false false R72.htm 9955550 - Disclosure - Segment Reporting (Details) Sheet http://www.alticeusa.com/role/SegmentReportingDetails_1 Segment Reporting (Details) Details http://www.alticeusa.com/role/SegmentReportingTables 72 false false All Reports Book All Reports atus-20250930.htm atus-20250930.xsd atus-20250930_cal.xml atus-20250930_def.xml atus-20250930_lab.xml atus-20250930_pre.xml atus-20250930_g1.jpg http://fasb.org/srt/2025 http://fasb.org/us-gaap/2025 http://xbrl.sec.gov/dei/2025 true true