3.24.0.1 html 525 619 1 false 131 0 false 16 false false R1.htm 0000001 - Document - Cover Page Sheet http://block.xyz/role/CoverPage Cover Page Cover 1 false false R2.htm 0000002 - Document - Audit Information Sheet http://block.xyz/role/AuditInformation Audit Information Cover 2 false false R3.htm 0000003 - Statement - CONSOLIDATED BALANCE SHEETS Sheet http://block.xyz/role/CONSOLIDATEDBALANCESHEETS CONSOLIDATED BALANCE SHEETS Statements 3 false false R4.htm 0000004 - Statement - CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) Sheet http://block.xyz/role/CONSOLIDATEDBALANCESHEETSUnauditedParenthetical CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) Statements 4 false false R5.htm 0000005 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS Sheet http://block.xyz/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS CONSOLIDATED STATEMENTS OF OPERATIONS Statements 5 false false R6.htm 0000006 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) Sheet http://block.xyz/role/CONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOMELOSS CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) Statements 6 false false R7.htm 0000007 - Statement - CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY Sheet http://block.xyz/role/CONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITY CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY Statements 7 false false R8.htm 0000008 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS Sheet http://block.xyz/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS CONSOLIDATED STATEMENTS OF CASH FLOWS Statements 8 false false R9.htm 0000009 - Disclosure - DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Sheet http://block.xyz/role/DESCRIPTIONOFBUSINESSANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIES DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Notes 9 false false R10.htm 0000010 - Disclosure - REVENUE Sheet http://block.xyz/role/REVENUE REVENUE Notes 10 false false R11.htm 0000011 - Disclosure - INVESTMENTS IN DEBT SECURITIES Sheet http://block.xyz/role/INVESTMENTSINDEBTSECURITIES INVESTMENTS IN DEBT SECURITIES Notes 11 false false R12.htm 0000012 - Disclosure - CUSTOMER FUNDS Sheet http://block.xyz/role/CUSTOMERFUNDS CUSTOMER FUNDS Notes 12 false false R13.htm 0000013 - Disclosure - FAIR VALUE MEASUREMENTS Sheet http://block.xyz/role/FAIRVALUEMEASUREMENTS FAIR VALUE MEASUREMENTS Notes 13 false false R14.htm 0000014 - Disclosure - CONSUMER RECEIVABLES, NET Sheet http://block.xyz/role/CONSUMERRECEIVABLESNET CONSUMER RECEIVABLES, NET Notes 14 false false R15.htm 0000015 - Disclosure - CUSTOMER LOANS Sheet http://block.xyz/role/CUSTOMERLOANS CUSTOMER LOANS Notes 15 false false R16.htm 0000016 - Disclosure - PROPERTY AND EQUIPMENT, NET Sheet http://block.xyz/role/PROPERTYANDEQUIPMENTNET PROPERTY AND EQUIPMENT, NET Notes 16 false false R17.htm 0000017 - Disclosure - ACQUISITIONS Sheet http://block.xyz/role/ACQUISITIONS ACQUISITIONS Notes 17 false false R18.htm 0000018 - Disclosure - GOODWILL Sheet http://block.xyz/role/GOODWILL GOODWILL Notes 18 false false R19.htm 0000019 - Disclosure - ACQUIRED INTANGIBLE ASSETS Sheet http://block.xyz/role/ACQUIREDINTANGIBLEASSETS ACQUIRED INTANGIBLE ASSETS Notes 19 false false R20.htm 0000020 - Disclosure - OTHER CONSOLIDATED BALANCE SHEET COMPONENTS (CURRENT) Sheet http://block.xyz/role/OTHERCONSOLIDATEDBALANCESHEETCOMPONENTSCURRENT OTHER CONSOLIDATED BALANCE SHEET COMPONENTS (CURRENT) Notes 20 false false R21.htm 0000021 - Disclosure - OTHER CONSOLIDATED BALANCE SHEET COMPONENTS (NON-CURRENT) Sheet http://block.xyz/role/OTHERCONSOLIDATEDBALANCESHEETCOMPONENTSNONCURRENT OTHER CONSOLIDATED BALANCE SHEET COMPONENTS (NON-CURRENT) Notes 21 false false R22.htm 0000022 - Disclosure - BITCOIN Sheet http://block.xyz/role/BITCOIN BITCOIN Notes 22 false false R23.htm 0000023 - Disclosure - INDEBTEDNESS Sheet http://block.xyz/role/INDEBTEDNESS INDEBTEDNESS Notes 23 false false R24.htm 0000024 - Disclosure - INCOME TAXES Sheet http://block.xyz/role/INCOMETAXES INCOME TAXES Notes 24 false false R25.htm 0000025 - Disclosure - STOCKHOLDERS' EQUITY Sheet http://block.xyz/role/STOCKHOLDERSEQUITY STOCKHOLDERS' EQUITY Notes 25 false false R26.htm 0000026 - Disclosure - NET INCOME (LOSS) PER SHARE Sheet http://block.xyz/role/NETINCOMELOSSPERSHARE NET INCOME (LOSS) PER SHARE Notes 26 false false R27.htm 0000027 - Disclosure - RELATED PARTY TRANSACTIONS Sheet http://block.xyz/role/RELATEDPARTYTRANSACTIONS RELATED PARTY TRANSACTIONS Notes 27 false false R28.htm 0000028 - Disclosure - COMMITMENTS AND CONTINGENCIES Sheet http://block.xyz/role/COMMITMENTSANDCONTINGENCIES COMMITMENTS AND CONTINGENCIES Notes 28 false false R29.htm 0000029 - Disclosure - SEGMENT AND GEOGRAPHICAL INFORMATION Sheet http://block.xyz/role/SEGMENTANDGEOGRAPHICALINFORMATION SEGMENT AND GEOGRAPHICAL INFORMATION Notes 29 false false R30.htm 0000030 - Disclosure - SUPPLEMENTAL CASH FLOW INFORMATION Sheet http://block.xyz/role/SUPPLEMENTALCASHFLOWINFORMATION SUPPLEMENTAL CASH FLOW INFORMATION Notes 30 false false R31.htm 995410 - Disclosure - Pay vs Performance Disclosure Sheet http://xbrl.sec.gov/ecd/role/PvpDisclosure Pay vs Performance Disclosure Notes 31 false false R32.htm 995445 - Disclosure - Insider Trading Arrangements Sheet http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements Insider Trading Arrangements Notes 32 false false R33.htm 9954471 - Disclosure - DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies) Sheet http://block.xyz/role/DESCRIPTIONOFBUSINESSANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESPolicies DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies) Policies 33 false false R34.htm 9954472 - Disclosure - DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables) Sheet http://block.xyz/role/DESCRIPTIONOFBUSINESSANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESTables DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables) Tables http://block.xyz/role/DESCRIPTIONOFBUSINESSANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIES 34 false false R35.htm 9954473 - Disclosure - REVENUE (Tables) Sheet http://block.xyz/role/REVENUETables REVENUE (Tables) Tables http://block.xyz/role/REVENUE 35 false false R36.htm 9954474 - Disclosure - INVESTMENTS IN DEBT SECURITIES (Tables) Sheet http://block.xyz/role/INVESTMENTSINDEBTSECURITIESTables INVESTMENTS IN DEBT SECURITIES (Tables) Tables http://block.xyz/role/INVESTMENTSINDEBTSECURITIES 36 false false R37.htm 9954475 - Disclosure - CUSTOMER FUNDS (Tables) Sheet http://block.xyz/role/CUSTOMERFUNDSTables CUSTOMER FUNDS (Tables) Tables http://block.xyz/role/CUSTOMERFUNDS 37 false false R38.htm 9954476 - Disclosure - FAIR VALUE MEASUREMENTS (Tables) Sheet http://block.xyz/role/FAIRVALUEMEASUREMENTSTables FAIR VALUE MEASUREMENTS (Tables) Tables http://block.xyz/role/FAIRVALUEMEASUREMENTS 38 false false R39.htm 9954477 - Disclosure - CONSUMER RECEIVABLES, NET (Tables) Sheet http://block.xyz/role/CONSUMERRECEIVABLESNETTables CONSUMER RECEIVABLES, NET (Tables) Tables http://block.xyz/role/CONSUMERRECEIVABLESNET 39 false false R40.htm 9954478 - Disclosure - CUSTOMER LOANS (Tables) Sheet http://block.xyz/role/CUSTOMERLOANSTables CUSTOMER LOANS (Tables) Tables http://block.xyz/role/CUSTOMERLOANS 40 false false R41.htm 9954479 - Disclosure - PROPERTY AND EQUIPMENT, NET (Tables) Sheet http://block.xyz/role/PROPERTYANDEQUIPMENTNETTables PROPERTY AND EQUIPMENT, NET (Tables) Tables http://block.xyz/role/PROPERTYANDEQUIPMENTNET 41 false false R42.htm 9954480 - Disclosure - ACQUISITIONS (Tables) Sheet http://block.xyz/role/ACQUISITIONSTables ACQUISITIONS (Tables) Tables http://block.xyz/role/ACQUISITIONS 42 false false R43.htm 9954481 - Disclosure - GOODWILL (Tables) Sheet http://block.xyz/role/GOODWILLTables GOODWILL (Tables) Tables http://block.xyz/role/GOODWILL 43 false false R44.htm 9954482 - Disclosure - ACQUIRED INTANGIBLE ASSETS (Tables) Sheet http://block.xyz/role/ACQUIREDINTANGIBLEASSETSTables ACQUIRED INTANGIBLE ASSETS (Tables) Tables http://block.xyz/role/ACQUIREDINTANGIBLEASSETS 44 false false R45.htm 9954483 - Disclosure - OTHER CONSOLIDATED BALANCE SHEET COMPONENTS (CURRENT) (Tables) Sheet http://block.xyz/role/OTHERCONSOLIDATEDBALANCESHEETCOMPONENTSCURRENTTables OTHER CONSOLIDATED BALANCE SHEET COMPONENTS (CURRENT) (Tables) Tables http://block.xyz/role/OTHERCONSOLIDATEDBALANCESHEETCOMPONENTSCURRENT 45 false false R46.htm 9954484 - Disclosure - OTHER CONSOLIDATED BALANCE SHEET COMPONENTS (NON-CURRENT) (Tables) Sheet http://block.xyz/role/OTHERCONSOLIDATEDBALANCESHEETCOMPONENTSNONCURRENTTables OTHER CONSOLIDATED BALANCE SHEET COMPONENTS (NON-CURRENT) (Tables) Tables http://block.xyz/role/OTHERCONSOLIDATEDBALANCESHEETCOMPONENTSCURRENT 46 false false R47.htm 9954485 - Disclosure - BITCOIN (Tables) Sheet http://block.xyz/role/BITCOINTables BITCOIN (Tables) Tables http://block.xyz/role/BITCOIN 47 false false R48.htm 9954486 - Disclosure - INDEBTEDNESS (Tables) Sheet http://block.xyz/role/INDEBTEDNESSTables INDEBTEDNESS (Tables) Tables http://block.xyz/role/INDEBTEDNESS 48 false false R49.htm 9954487 - Disclosure - INCOME TAXES (Tables) Sheet http://block.xyz/role/INCOMETAXESTables INCOME TAXES (Tables) Tables http://block.xyz/role/INCOMETAXES 49 false false R50.htm 9954488 - Disclosure - STOCKHOLDERS' EQUITY (Tables) Sheet http://block.xyz/role/STOCKHOLDERSEQUITYTables STOCKHOLDERS' EQUITY (Tables) Tables http://block.xyz/role/STOCKHOLDERSEQUITY 50 false false R51.htm 9954489 - Disclosure - NET INCOME (LOSS) PER SHARE (Tables) Sheet http://block.xyz/role/NETINCOMELOSSPERSHARETables NET INCOME (LOSS) PER SHARE (Tables) Tables http://block.xyz/role/NETINCOMELOSSPERSHARE 51 false false R52.htm 9954490 - Disclosure - COMMITMENTS AND CONTINGENCIES (Tables) Sheet http://block.xyz/role/COMMITMENTSANDCONTINGENCIESTables COMMITMENTS AND CONTINGENCIES (Tables) Tables http://block.xyz/role/COMMITMENTSANDCONTINGENCIES 52 false false R53.htm 9954491 - Disclosure - SEGMENT AND GEOGRAPHICAL INFORMATION (Tables) Sheet http://block.xyz/role/SEGMENTANDGEOGRAPHICALINFORMATIONTables SEGMENT AND GEOGRAPHICAL INFORMATION (Tables) Tables http://block.xyz/role/SEGMENTANDGEOGRAPHICALINFORMATION 53 false false R54.htm 9954492 - Disclosure - SUPPLEMENTAL CASH FLOW INFORMATION (Tables) Sheet http://block.xyz/role/SUPPLEMENTALCASHFLOWINFORMATIONTables SUPPLEMENTAL CASH FLOW INFORMATION (Tables) Tables http://block.xyz/role/SUPPLEMENTALCASHFLOWINFORMATION 54 false false R55.htm 9954493 - Disclosure - DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) Sheet http://block.xyz/role/DESCRIPTIONOFBUSINESSANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESNarrativeDetails DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) Details http://block.xyz/role/DESCRIPTIONOFBUSINESSANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESTables 55 false false R56.htm 9954494 - Disclosure - DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Estimated Useful Lives of Property and Equipment (Details) Sheet http://block.xyz/role/DESCRIPTIONOFBUSINESSANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESEstimatedUsefulLivesofPropertyandEquipmentDetails DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Estimated Useful Lives of Property and Equipment (Details) Details 56 false false R57.htm 9954495 - Disclosure - REVENUE - Disaggregation of Revenue (Details) Sheet http://block.xyz/role/REVENUEDisaggregationofRevenueDetails REVENUE - Disaggregation of Revenue (Details) Details 57 false false R58.htm 9954496 - Disclosure - INVESTMENTS IN DEBT SECURITIES - Short-Term and Long-Term Investments (Details) Sheet http://block.xyz/role/INVESTMENTSINDEBTSECURITIESShortTermandLongTermInvestmentsDetails INVESTMENTS IN DEBT SECURITIES - Short-Term and Long-Term Investments (Details) Details 58 false false R59.htm 9954497 - Disclosure - INVESTMENTS IN DEBT SECURITIES - Debt Securities, Available-for-sale, Unrealized Loss Position, Fair Value (Details) Sheet http://block.xyz/role/INVESTMENTSINDEBTSECURITIESDebtSecuritiesAvailableforsaleUnrealizedLossPositionFairValueDetails INVESTMENTS IN DEBT SECURITIES - Debt Securities, Available-for-sale, Unrealized Loss Position, Fair Value (Details) Details 59 false false R60.htm 9954498 - Disclosure - INVESTMENTS IN DEBT SECURITIES - Contractual Maturities of Short-Term and Long-Term Investments (Details) Sheet http://block.xyz/role/INVESTMENTSINDEBTSECURITIESContractualMaturitiesofShortTermandLongTermInvestmentsDetails INVESTMENTS IN DEBT SECURITIES - Contractual Maturities of Short-Term and Long-Term Investments (Details) Details 60 false false R61.htm 9954499 - Disclosure - CUSTOMER FUNDS - Assets Underlying Customer Funds (Details) Sheet http://block.xyz/role/CUSTOMERFUNDSAssetsUnderlyingCustomerFundsDetails CUSTOMER FUNDS - Assets Underlying Customer Funds (Details) Details 61 false false R62.htm 9954500 - Disclosure - FAIR VALUE MEASUREMENTS - Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) Sheet http://block.xyz/role/FAIRVALUEMEASUREMENTSFinancialAssetsandLiabilitiesMeasuredatFairValueonaRecurringBasisDetails FAIR VALUE MEASUREMENTS - Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) Details 62 false false R63.htm 9954501 - Disclosure - FAIR VALUE MEASUREMENTS - Fair Value and Carrying Value of Convertible Senior Notes (Details) Notes http://block.xyz/role/FAIRVALUEMEASUREMENTSFairValueandCarryingValueofConvertibleSeniorNotesDetails FAIR VALUE MEASUREMENTS - Fair Value and Carrying Value of Convertible Senior Notes (Details) Details 63 false false R64.htm 9954502 - Disclosure - FAIR VALUE MEASUREMENTS - Fair Value and Carrying Value of Loans Held for Sale (Details) Sheet http://block.xyz/role/FAIRVALUEMEASUREMENTSFairValueandCarryingValueofLoansHeldforSaleDetails FAIR VALUE MEASUREMENTS - Fair Value and Carrying Value of Loans Held for Sale (Details) Details 64 false false R65.htm 9954503 - Disclosure - FAIR VALUE MEASUREMENTS - Narrative (Details) Sheet http://block.xyz/role/FAIRVALUEMEASUREMENTSNarrativeDetails FAIR VALUE MEASUREMENTS - Narrative (Details) Details 65 false false R66.htm 9954504 - Disclosure - CONSUMER RECEIVABLES, NET - Narrative (Details) Sheet http://block.xyz/role/CONSUMERRECEIVABLESNETNarrativeDetails CONSUMER RECEIVABLES, NET - Narrative (Details) Details 66 false false R67.htm 9954505 - Disclosure - CONSUMER RECEIVABLES, NET - Aging Analysis (Details) Sheet http://block.xyz/role/CONSUMERRECEIVABLESNETAgingAnalysisDetails CONSUMER RECEIVABLES, NET - Aging Analysis (Details) Details 67 false false R68.htm 9954506 - Disclosure - CONSUMER RECEIVABLES, NET - Activity in Allowance for Credit Losses (Details) Sheet http://block.xyz/role/CONSUMERRECEIVABLESNETActivityinAllowanceforCreditLossesDetails CONSUMER RECEIVABLES, NET - Activity in Allowance for Credit Losses (Details) Details 68 false false R69.htm 9954507 - Disclosure - CUSTOMER LOANS - Narrative (Details) Sheet http://block.xyz/role/CUSTOMERLOANSNarrativeDetails CUSTOMER LOANS - Narrative (Details) Details 69 false false R70.htm 9954508 - Disclosure - CUSTOMER LOANS - Loans Held for Sale by Category (Details) Sheet http://block.xyz/role/CUSTOMERLOANSLoansHeldforSalebyCategoryDetails CUSTOMER LOANS - Loans Held for Sale by Category (Details) Details 70 false false R71.htm 9954509 - Disclosure - PROPERTY AND EQUIPMENT, NET - Schedule of Property and Equipment, Net (Details) Sheet http://block.xyz/role/PROPERTYANDEQUIPMENTNETScheduleofPropertyandEquipmentNetDetails PROPERTY AND EQUIPMENT, NET - Schedule of Property and Equipment, Net (Details) Details 71 false false R72.htm 9954510 - Disclosure - PROPERTY AND EQUIPMENT, NET - Narrative (Details) Sheet http://block.xyz/role/PROPERTYANDEQUIPMENTNETNarrativeDetails PROPERTY AND EQUIPMENT, NET - Narrative (Details) Details 72 false false R73.htm 9954511 - Disclosure - ACQUISITIONS - Narrative (Details) Sheet http://block.xyz/role/ACQUISITIONSNarrativeDetails ACQUISITIONS - Narrative (Details) Details 73 false false R74.htm 9954512 - Disclosure - ACQUISITIONS - Assets Acquired and Liabilities Assumed (Details) Sheet http://block.xyz/role/ACQUISITIONSAssetsAcquiredandLiabilitiesAssumedDetails ACQUISITIONS - Assets Acquired and Liabilities Assumed (Details) Details 74 false false R75.htm 9954513 - Disclosure - GOODWILL - Schedule of Change in Carrying Value of Goodwill (Details) Sheet http://block.xyz/role/GOODWILLScheduleofChangeinCarryingValueofGoodwillDetails GOODWILL - Schedule of Change in Carrying Value of Goodwill (Details) Details 75 false false R76.htm 9954514 - Disclosure - GOODWILL - Narrative (Details) Sheet http://block.xyz/role/GOODWILLNarrativeDetails GOODWILL - Narrative (Details) Details 76 false false R77.htm 9954515 - Disclosure - ACQUIRED INTANGIBLE ASSETS - Schedule of Acquired Intangible Assets (Details) Sheet http://block.xyz/role/ACQUIREDINTANGIBLEASSETSScheduleofAcquiredIntangibleAssetsDetails ACQUIRED INTANGIBLE ASSETS - Schedule of Acquired Intangible Assets (Details) Details 77 false false R78.htm 9954516 - Disclosure - ACQUIRED INTANGIBLE ASSETS - Change in Carrying Value of Acquired Intangible Assets (Details) Sheet http://block.xyz/role/ACQUIREDINTANGIBLEASSETSChangeinCarryingValueofAcquiredIntangibleAssetsDetails ACQUIRED INTANGIBLE ASSETS - Change in Carrying Value of Acquired Intangible Assets (Details) Details 78 false false R79.htm 9954517 - Disclosure - ACQUIRED INTANGIBLE ASSETS - Future Amortization of Intangible Assets (Details) Sheet http://block.xyz/role/ACQUIREDINTANGIBLEASSETSFutureAmortizationofIntangibleAssetsDetails ACQUIRED INTANGIBLE ASSETS - Future Amortization of Intangible Assets (Details) Details 79 false false R80.htm 9954518 - Disclosure - OTHER CONSOLIDATED BALANCE SHEET COMPONENTS (CURRENT) - Other Current Assets (Details) Sheet http://block.xyz/role/OTHERCONSOLIDATEDBALANCESHEETCOMPONENTSCURRENTOtherCurrentAssetsDetails OTHER CONSOLIDATED BALANCE SHEET COMPONENTS (CURRENT) - Other Current Assets (Details) Details http://block.xyz/role/OTHERCONSOLIDATEDBALANCESHEETCOMPONENTSCURRENTTables 80 false false R81.htm 9954519 - Disclosure - OTHER CONSOLIDATED BALANCE SHEET COMPONENTS (CURRENT) - Accrued Expenses and Other Current Liabilities (Details) Sheet http://block.xyz/role/OTHERCONSOLIDATEDBALANCESHEETCOMPONENTSCURRENTAccruedExpensesandOtherCurrentLiabilitiesDetails OTHER CONSOLIDATED BALANCE SHEET COMPONENTS (CURRENT) - Accrued Expenses and Other Current Liabilities (Details) Details http://block.xyz/role/OTHERCONSOLIDATEDBALANCESHEETCOMPONENTSCURRENTTables 81 false false R82.htm 9954520 - Disclosure - OTHER CONSOLIDATED BALANCE SHEET COMPONENTS (CURRENT) - Reserve for Transaction Losses (Details) Sheet http://block.xyz/role/OTHERCONSOLIDATEDBALANCESHEETCOMPONENTSCURRENTReserveforTransactionLossesDetails OTHER CONSOLIDATED BALANCE SHEET COMPONENTS (CURRENT) - Reserve for Transaction Losses (Details) Details http://block.xyz/role/OTHERCONSOLIDATEDBALANCESHEETCOMPONENTSCURRENTTables 82 false false R83.htm 9954521 - Disclosure - OTHER CONSOLIDATED BALANCE SHEET COMPONENTS (CURRENT) - Narrative (Details) Sheet http://block.xyz/role/OTHERCONSOLIDATEDBALANCESHEETCOMPONENTSCURRENTNarrativeDetails OTHER CONSOLIDATED BALANCE SHEET COMPONENTS (CURRENT) - Narrative (Details) Details http://block.xyz/role/OTHERCONSOLIDATEDBALANCESHEETCOMPONENTSCURRENTTables 83 false false R84.htm 9954522 - Disclosure - OTHER CONSOLIDATED BALANCE SHEET COMPONENTS (NON-CURRENT) - Other Non-Current Assets (Details) Sheet http://block.xyz/role/OTHERCONSOLIDATEDBALANCESHEETCOMPONENTSNONCURRENTOtherNonCurrentAssetsDetails OTHER CONSOLIDATED BALANCE SHEET COMPONENTS (NON-CURRENT) - Other Non-Current Assets (Details) Details http://block.xyz/role/OTHERCONSOLIDATEDBALANCESHEETCOMPONENTSCURRENTTables 84 false false R85.htm 9954523 - Disclosure - BITCOIN - Narrative (Details) Sheet http://block.xyz/role/BITCOINNarrativeDetails BITCOIN - Narrative (Details) Details 85 false false R86.htm 9954524 - Disclosure - BITCOIN - Changes in Bitcoin Investment (Details) Sheet http://block.xyz/role/BITCOINChangesinBitcoinInvestmentDetails BITCOIN - Changes in Bitcoin Investment (Details) Details 86 false false R87.htm 9954525 - Disclosure - BITCOIN - Changes in Bitcoin for Operating Purposes (Details) Sheet http://block.xyz/role/BITCOINChangesinBitcoinforOperatingPurposesDetails BITCOIN - Changes in Bitcoin for Operating Purposes (Details) Details 87 false false R88.htm 9954526 - Disclosure - BITCOIN - Bitcoin Held on Behalf of Others (Details) Sheet http://block.xyz/role/BITCOINBitcoinHeldonBehalfofOthersDetails BITCOIN - Bitcoin Held on Behalf of Others (Details) Details 88 false false R89.htm 9954527 - Disclosure - INDEBTEDNESS - Facility Narrative (Details) Sheet http://block.xyz/role/INDEBTEDNESSFacilityNarrativeDetails INDEBTEDNESS - Facility Narrative (Details) Details 89 false false R90.htm 9954528 - Disclosure - INDEBTEDNESS - Amounts Drawn on Facilities by Year of Maturity (Details) Sheet http://block.xyz/role/INDEBTEDNESSAmountsDrawnonFacilitiesbyYearofMaturityDetails INDEBTEDNESS - Amounts Drawn on Facilities by Year of Maturity (Details) Details 90 false false R91.htm 9954529 - Disclosure - INDEBTEDNESS - Senior Unsecured Notes Narrative (Details) Notes http://block.xyz/role/INDEBTEDNESSSeniorUnsecuredNotesNarrativeDetails INDEBTEDNESS - Senior Unsecured Notes Narrative (Details) Details 91 false false R92.htm 9954530 - Disclosure - INDEBTEDNESS - Convertible Notes Narrative (Details) Notes http://block.xyz/role/INDEBTEDNESSConvertibleNotesNarrativeDetails INDEBTEDNESS - Convertible Notes Narrative (Details) Details 92 false false R93.htm 9954531 - Disclosure - INDEBTEDNESS - Net Carrying Amount of Convertible Notes (Details) Notes http://block.xyz/role/INDEBTEDNESSNetCarryingAmountofConvertibleNotesDetails INDEBTEDNESS - Net Carrying Amount of Convertible Notes (Details) Details 93 false false R94.htm 9954532 - Disclosure - INDEBTEDNESS - Interest Expense on Convertible Notes (Details) Notes http://block.xyz/role/INDEBTEDNESSInterestExpenseonConvertibleNotesDetails INDEBTEDNESS - Interest Expense on Convertible Notes (Details) Details 94 false false R95.htm 9954533 - Disclosure - INDEBTEDNESS - Convertible Note Hedge and Warrant Transactions Narrative (Details) Sheet http://block.xyz/role/INDEBTEDNESSConvertibleNoteHedgeandWarrantTransactionsNarrativeDetails INDEBTEDNESS - Convertible Note Hedge and Warrant Transactions Narrative (Details) Details 95 false false R96.htm 9954534 - Disclosure - INCOME TAXES - Domestic and Foreign Components of Income (Loss) Before Income Taxes (Details) Sheet http://block.xyz/role/INCOMETAXESDomesticandForeignComponentsofIncomeLossBeforeIncomeTaxesDetails INCOME TAXES - Domestic and Foreign Components of Income (Loss) Before Income Taxes (Details) Details 96 false false R97.htm 9954535 - Disclosure - INCOME TAXES - Components of Provision for Income Taxes (Details) Sheet http://block.xyz/role/INCOMETAXESComponentsofProvisionforIncomeTaxesDetails INCOME TAXES - Components of Provision for Income Taxes (Details) Details 97 false false R98.htm 9954536 - Disclosure - INCOME TAXES - Reconciliation of Statutory Federal Income Tax Rate to Company's Effective Tax Rate (Details) Sheet http://block.xyz/role/INCOMETAXESReconciliationofStatutoryFederalIncomeTaxRatetoCompanysEffectiveTaxRateDetails INCOME TAXES - Reconciliation of Statutory Federal Income Tax Rate to Company's Effective Tax Rate (Details) Details 98 false false R99.htm 9954537 - Disclosure - INCOME TAXES - Tax Effects of Temporary Differences and Related Deferred Tax Assets and Liabilities (Details) Sheet http://block.xyz/role/INCOMETAXESTaxEffectsofTemporaryDifferencesandRelatedDeferredTaxAssetsandLiabilitiesDetails INCOME TAXES - Tax Effects of Temporary Differences and Related Deferred Tax Assets and Liabilities (Details) Details 99 false false R100.htm 9954538 - Disclosure - INCOME TAXES - Narrative (Details) Sheet http://block.xyz/role/INCOMETAXESNarrativeDetails INCOME TAXES - Narrative (Details) Details 100 false false R101.htm 9954539 - Disclosure - INCOME TAXES - Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefit (Details) Sheet http://block.xyz/role/INCOMETAXESReconciliationofBeginningandEndingAmountofUnrecognizedTaxBenefitDetails INCOME TAXES - Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefit (Details) Details 101 false false R102.htm 9954540 - Disclosure - STOCKHOLDERS' EQUITY - Common Stock, Warrants, Conversion of Convertible Notes and Exercise of Convertible Note Hedges and Share Repurchase Program Narrative (Details) Notes http://block.xyz/role/STOCKHOLDERSEQUITYCommonStockWarrantsConversionofConvertibleNotesandExerciseofConvertibleNoteHedgesandShareRepurchaseProgramNarrativeDetails STOCKHOLDERS' EQUITY - Common Stock, Warrants, Conversion of Convertible Notes and Exercise of Convertible Note Hedges and Share Repurchase Program Narrative (Details) Details 102 false false R103.htm 9954541 - Disclosure - STOCKHOLDERS' EQUITY - Stock Plans and Share Based Compensation Narrative (Details) Sheet http://block.xyz/role/STOCKHOLDERSEQUITYStockPlansandShareBasedCompensationNarrativeDetails STOCKHOLDERS' EQUITY - Stock Plans and Share Based Compensation Narrative (Details) Details 103 false false R104.htm 9954542 - Disclosure - STOCKHOLDERS' EQUITY - Summary of Stock Option Activity (Details) Sheet http://block.xyz/role/STOCKHOLDERSEQUITYSummaryofStockOptionActivityDetails STOCKHOLDERS' EQUITY - Summary of Stock Option Activity (Details) Details 104 false false R105.htm 9954543 - Disclosure - STOCKHOLDERS' EQUITY - Restricted Stock Awards and Restricted Stock Units Activity (Details) Sheet http://block.xyz/role/STOCKHOLDERSEQUITYRestrictedStockAwardsandRestrictedStockUnitsActivityDetails STOCKHOLDERS' EQUITY - Restricted Stock Awards and Restricted Stock Units Activity (Details) Details 105 false false R106.htm 9954544 - Disclosure - STOCKHOLDERS' EQUITY - Stock Options Fair Value Assumptions (Details) Sheet http://block.xyz/role/STOCKHOLDERSEQUITYStockOptionsFairValueAssumptionsDetails STOCKHOLDERS' EQUITY - Stock Options Fair Value Assumptions (Details) Details 106 false false R107.htm 9954545 - Disclosure - STOCKHOLDERS' EQUITY - Effects of Share-Based Compensation on Consolidated Statements of Operations (Details) Sheet http://block.xyz/role/STOCKHOLDERSEQUITYEffectsofShareBasedCompensationonConsolidatedStatementsofOperationsDetails STOCKHOLDERS' EQUITY - Effects of Share-Based Compensation on Consolidated Statements of Operations (Details) Details 107 false false R108.htm 9954546 - Disclosure - NET INCOME (LOSS) PER SHARE - Calculation of Basic and Diluted Net Income (Loss) Per Share (Details) Sheet http://block.xyz/role/NETINCOMELOSSPERSHARECalculationofBasicandDilutedNetIncomeLossPerShareDetails NET INCOME (LOSS) PER SHARE - Calculation of Basic and Diluted Net Income (Loss) Per Share (Details) Details http://block.xyz/role/NETINCOMELOSSPERSHARETables 108 false false R109.htm 9954547 - Disclosure - NET INCOME (LOSS) PER SHARE - Antidilutive Securities Excluded from Computation of Diluted Net Income (Loss) Per Share (Details) Sheet http://block.xyz/role/NETINCOMELOSSPERSHAREAntidilutiveSecuritiesExcludedfromComputationofDilutedNetIncomeLossPerShareDetails NET INCOME (LOSS) PER SHARE - Antidilutive Securities Excluded from Computation of Diluted Net Income (Loss) Per Share (Details) Details http://block.xyz/role/NETINCOMELOSSPERSHARETables 109 false false R110.htm 9954548 - Disclosure - RELATED PARTY TRANSACTIONS (Details) Sheet http://block.xyz/role/RELATEDPARTYTRANSACTIONSDetails RELATED PARTY TRANSACTIONS (Details) Details http://block.xyz/role/RELATEDPARTYTRANSACTIONS 110 false false R111.htm 9954549 - Disclosure - COMMITMENTS AND CONTINGENCIES - Narrative (Details) Sheet http://block.xyz/role/COMMITMENTSANDCONTINGENCIESNarrativeDetails COMMITMENTS AND CONTINGENCIES - Narrative (Details) Details 111 false false R112.htm 9954550 - Disclosure - COMMITMENTS AND CONTINGENCIES - Lease Expense Components (Details) Sheet http://block.xyz/role/COMMITMENTSANDCONTINGENCIESLeaseExpenseComponentsDetails COMMITMENTS AND CONTINGENCIES - Lease Expense Components (Details) Details 112 false false R113.htm 9954551 - Disclosure - COMMITMENTS AND CONTINGENCIES - Other Information Related to Leases (Details) Sheet http://block.xyz/role/COMMITMENTSANDCONTINGENCIESOtherInformationRelatedtoLeasesDetails COMMITMENTS AND CONTINGENCIES - Other Information Related to Leases (Details) Details 113 false false R114.htm 9954552 - Disclosure - COMMITMENTS AND CONTINGENCIES - Cash Flows Related to Leases (Details) Sheet http://block.xyz/role/COMMITMENTSANDCONTINGENCIESCashFlowsRelatedtoLeasesDetails COMMITMENTS AND CONTINGENCIES - Cash Flows Related to Leases (Details) Details 114 false false R115.htm 9954553 - Disclosure - COMMITMENTS AND CONTINGENCIES - Future Minimum Lease Payments Under Non-Cancelable Operating Leases (Details) Sheet http://block.xyz/role/COMMITMENTSANDCONTINGENCIESFutureMinimumLeasePaymentsUnderNonCancelableOperatingLeasesDetails COMMITMENTS AND CONTINGENCIES - Future Minimum Lease Payments Under Non-Cancelable Operating Leases (Details) Details 115 false false R116.htm 9954554 - Disclosure - COMMITMENTS AND CONTINGENCIES - Future Minimum Payments under the Purchase Commitments (Details) Sheet http://block.xyz/role/COMMITMENTSANDCONTINGENCIESFutureMinimumPaymentsunderthePurchaseCommitmentsDetails COMMITMENTS AND CONTINGENCIES - Future Minimum Payments under the Purchase Commitments (Details) Details 116 false false R117.htm 9954555 - Disclosure - SEGMENT AND GEOGRAPHICAL INFORMATION - Narrative (Details) Sheet http://block.xyz/role/SEGMENTANDGEOGRAPHICALINFORMATIONNarrativeDetails SEGMENT AND GEOGRAPHICAL INFORMATION - Narrative (Details) Details 117 false false R118.htm 9954556 - Disclosure - SEGMENT AND GEOGRAPHICAL INFORMATION - Segment Reporting Information (Details) Sheet http://block.xyz/role/SEGMENTANDGEOGRAPHICALINFORMATIONSegmentReportingInformationDetails SEGMENT AND GEOGRAPHICAL INFORMATION - Segment Reporting Information (Details) Details 118 false false R119.htm 9954557 - Disclosure - SEGMENT AND GEOGRAPHICAL INFORMATION - Reconciliation of Total Segment Profit to Income before applicable Income Taxes (Details) Sheet http://block.xyz/role/SEGMENTANDGEOGRAPHICALINFORMATIONReconciliationofTotalSegmentProfittoIncomebeforeapplicableIncomeTaxesDetails SEGMENT AND GEOGRAPHICAL INFORMATION - Reconciliation of Total Segment Profit to Income before applicable Income Taxes (Details) Details 119 false false R120.htm 9954558 - Disclosure - SEGMENT AND GEOGRAPHICAL INFORMATION - Revenue by Geographic Area (Details) Sheet http://block.xyz/role/SEGMENTANDGEOGRAPHICALINFORMATIONRevenuebyGeographicAreaDetails SEGMENT AND GEOGRAPHICAL INFORMATION - Revenue by Geographic Area (Details) Details 120 false false R121.htm 9954559 - Disclosure - SEGMENT AND GEOGRAPHICAL INFORMATION - Long-Lived Assets by Geographic Area (Details) Sheet http://block.xyz/role/SEGMENTANDGEOGRAPHICALINFORMATIONLongLivedAssetsbyGeographicAreaDetails SEGMENT AND GEOGRAPHICAL INFORMATION - Long-Lived Assets by Geographic Area (Details) Details 121 false false R122.htm 9954560 - Disclosure - SUPPLEMENTAL CASH FLOW INFORMATION - Supplemental Cash Flow Data (Details) Sheet http://block.xyz/role/SUPPLEMENTALCASHFLOWINFORMATIONSupplementalCashFlowDataDetails SUPPLEMENTAL CASH FLOW INFORMATION - Supplemental Cash Flow Data (Details) Details 122 false false R9999.htm Uncategorized Items - sq-20231231.htm Sheet http://xbrl.sec.gov/role/uncategorizedFacts Uncategorized Items - sq-20231231.htm Cover 123 false false All Reports Book All Reports sq-20231231.htm sq-20231231.xsd sq-20231231_cal.xml sq-20231231_def.xml sq-20231231_lab.xml sq-20231231_pre.xml sq-20231231_g1.jpg sq-20231231_g2.jpg sq-20231231_g3.jpg sq-20231231_g4.jpg sq-20231231_g5.jpg sq-20231231_g6.jpg sq-20231231_g7.jpg http://fasb.org/srt/2023 http://fasb.org/us-gaap/2023 http://xbrl.sec.gov/dei/2023 http://xbrl.sec.gov/ecd/2023 true true