3.26.1 html 1220 312 1 true 227 0 false 5 false false R1.htm 75000 - Document - Document and Entity Information Sheet http://kaynebdc.com/20260331/taxonomy/role/DocumentDocumentAndEntityInformation Document and Entity Information Cover 1 false false R2.htm 75010 - Statement - Consolidated Statements of Assets and Liabilities Sheet http://kaynebdc.com/20260331/taxonomy/role/kbdc_r_ConsolidatedBalanceSheet Consolidated Statements of Assets and Liabilities Statements 2 false false R3.htm 75020 - Statement - Consolidated Statements of Assets and Liabilities (Parentheticals) Sheet http://kaynebdc.com/20260331/taxonomy/role/kbdc_r_ConsolidatedBalanceSheet_Parentheticals Consolidated Statements of Assets and Liabilities (Parentheticals) Statements 3 false false R4.htm 75030 - Statement - Consolidated Statements of Operations (Unaudited) Sheet http://kaynebdc.com/20260331/taxonomy/role/kbdc_r_ConsolidatedIncomeStatement Consolidated Statements of Operations (Unaudited) Statements 4 false false R5.htm 75040 - Statement - Consolidated Statements of Changes in Net Assets (Unaudited) Sheet http://kaynebdc.com/20260331/taxonomy/role/kbdc_r_ShareholdersEquityType1 Consolidated Statements of Changes in Net Assets (Unaudited) Statements 5 false false R6.htm 75050 - Statement - Consolidated Statements of Cash Flows (Unaudited) Sheet http://kaynebdc.com/20260331/taxonomy/role/kbdc_r_ConsolidatedCashFlow Consolidated Statements of Cash Flows (Unaudited) Statements 6 false false R7.htm 75060 - Statement - Consolidated Schedule of Investments (Unaudited) Sheet http://kaynebdc.com/20260331/taxonomy/role/kbdc_r_ConsolidatedScheduleofInvestmentsUnauditedTable Consolidated Schedule of Investments (Unaudited) Statements 7 false false R8.htm 75070 - Statement - Consolidated Schedule of Investments (Unaudited) (Parentheticals) Sheet http://kaynebdc.com/20260331/taxonomy/role/StatementConsolidatedScheduleOfInvestmentsUnauditedParentheticals Consolidated Schedule of Investments (Unaudited) (Parentheticals) Statements 8 false false R9.htm 75080 - Statement - Consolidated Schedule of Investments - Interest Rate Swap Contracts (Unaudited) (Parentheticals) Sheet http://kaynebdc.com/20260331/taxonomy/role/StatementConsolidatedScheduleOfInvestmentsInterestRateSwapContractsUnauditedParentheticals Consolidated Schedule of Investments - Interest Rate Swap Contracts (Unaudited) (Parentheticals) Statements 9 false false R10.htm 75090 - Disclosure - Organization Sheet http://kaynebdc.com/20260331/taxonomy/role/kbdc_r_Organization Organization Notes 10 false false R11.htm 75100 - Disclosure - Significant Accounting Policies Sheet http://kaynebdc.com/20260331/taxonomy/role/kbdc_r_SignificantAccountingPolicies Significant Accounting Policies Notes 11 false false R12.htm 75110 - Disclosure - Agreements and Related Party Transactions Sheet http://kaynebdc.com/20260331/taxonomy/role/kbdc_r_AgreementsandRelatedPartyTransactions Agreements and Related Party Transactions Notes 12 false false R13.htm 75120 - Disclosure - Investments Sheet http://kaynebdc.com/20260331/taxonomy/role/kbdc_r_Investments Investments Notes 13 false false R14.htm 75130 - Disclosure - Fair Value Sheet http://kaynebdc.com/20260331/taxonomy/role/kbdc_r_FairValue Fair Value Notes 14 false false R15.htm 75140 - Disclosure - Debt Sheet http://kaynebdc.com/20260331/taxonomy/role/kbdc_r_Debt Debt Notes 15 false false R16.htm 75150 - Disclosure - Common Stock and Share Transactions Sheet http://kaynebdc.com/20260331/taxonomy/role/kbdc_r_CommonStockandShareTransactions Common Stock and Share Transactions Notes 16 false false R17.htm 75160 - Disclosure - Commitments and Contingencies Sheet http://kaynebdc.com/20260331/taxonomy/role/kbdc_r_CommitmentsandContingencies Commitments and Contingencies Notes 17 false false R18.htm 75170 - Disclosure - Earnings Per Share Sheet http://kaynebdc.com/20260331/taxonomy/role/kbdc_r_EarningsPerShare Earnings Per Share Notes 18 false false R19.htm 75180 - Disclosure - Financial Highlights Sheet http://kaynebdc.com/20260331/taxonomy/role/kbdc_r_FinancialHighlights Financial Highlights Notes 19 false false R20.htm 75190 - Disclosure - Segment Reporting Sheet http://kaynebdc.com/20260331/taxonomy/role/kbdc_r_SegmentReporting Segment Reporting Notes 20 false false R21.htm 75200 - Disclosure - Subsequent Events Sheet http://kaynebdc.com/20260331/taxonomy/role/kbdc_r_SubsequentEvents Subsequent Events Notes 21 false false R22.htm 995410 - Disclosure - Pay vs Performance Disclosure Sheet http://xbrl.sec.gov/ecd/role/PvpDisclosure Pay vs Performance Disclosure Notes 22 false false R23.htm 995445 - Disclosure - Insider Trading Arrangements Sheet http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements Insider Trading Arrangements Notes 23 false false R24.htm 995470 - Disclosure - N-2 Sheet http://xbrl.sec.gov/cef/role/N2 N-2 Notes 24 false false R25.htm 995480 - Disclosure - Accounting Policies, by Policy (Policies) Sheet http://kaynebdc.com/20260331/taxonomy/role/kbdc_r_AccountingPoliciesByPolicy Accounting Policies, by Policy (Policies) Policies http://kaynebdc.com/20260331/taxonomy/role/kbdc_r_SignificantAccountingPolicies 25 false false R26.htm 995490 - Disclosure - Investments (Tables) Sheet http://kaynebdc.com/20260331/taxonomy/role/kbdc_r_InvestmentsTables Investments (Tables) Tables http://kaynebdc.com/20260331/taxonomy/role/kbdc_r_Investments 26 false false R27.htm 995500 - Disclosure - Fair Value (Tables) Sheet http://kaynebdc.com/20260331/taxonomy/role/kbdc_r_FairValueTables Fair Value (Tables) Tables http://kaynebdc.com/20260331/taxonomy/role/kbdc_r_FairValue 27 false false R28.htm 995510 - Disclosure - Debt (Tables) Sheet http://kaynebdc.com/20260331/taxonomy/role/kbdc_r_DebtTables Debt (Tables) Tables http://kaynebdc.com/20260331/taxonomy/role/kbdc_r_Debt 28 false false R29.htm 995520 - Disclosure - Common Stock and Share Transactions (Tables) Sheet http://kaynebdc.com/20260331/taxonomy/role/kbdc_r_CommonStockandShareTransactionsTables Common Stock and Share Transactions (Tables) Tables http://kaynebdc.com/20260331/taxonomy/role/kbdc_r_CommonStockandShareTransactions 29 false false R30.htm 995530 - Disclosure - Commitments and Contingencies (Tables) Sheet http://kaynebdc.com/20260331/taxonomy/role/kbdc_r_CommitmentsandContingenciesTables Commitments and Contingencies (Tables) Tables http://kaynebdc.com/20260331/taxonomy/role/kbdc_r_CommitmentsandContingencies 30 false false R31.htm 995540 - Disclosure - Earnings Per Share (Tables) Sheet http://kaynebdc.com/20260331/taxonomy/role/kbdc_r_EarningsPerShareTables Earnings Per Share (Tables) Tables http://kaynebdc.com/20260331/taxonomy/role/kbdc_r_EarningsPerShare 31 false false R32.htm 995550 - Disclosure - Financial Highlights (Tables) Sheet http://kaynebdc.com/20260331/taxonomy/role/kbdc_r_FinancialHighlightsTables Financial Highlights (Tables) Tables http://kaynebdc.com/20260331/taxonomy/role/kbdc_r_FinancialHighlights 32 false false R33.htm 995560 - Disclosure - Significant Accounting Policies (Details) Sheet http://kaynebdc.com/20260331/taxonomy/role/kbdc_r_SignificantAccountingPoliciesDetails Significant Accounting Policies (Details) Details 33 false false R34.htm 995570 - Disclosure - Agreements and Related Party Transactions (Details) Sheet http://kaynebdc.com/20260331/taxonomy/role/kbdc_r_AgreementsandRelatedPartyTransactionsDetails Agreements and Related Party Transactions (Details) Details http://kaynebdc.com/20260331/taxonomy/role/kbdc_r_AgreementsandRelatedPartyTransactions 34 false false R35.htm 995580 - Disclosure - Investments (Details) Sheet http://kaynebdc.com/20260331/taxonomy/role/kbdc_r_InvestmentsDetails Investments (Details) Details http://kaynebdc.com/20260331/taxonomy/role/kbdc_r_InvestmentsTables 35 false false R36.htm 995590 - Disclosure - Investments - Schedule of Investment Portfolio at Amortized Cost and Fair Value (Details) Sheet http://kaynebdc.com/20260331/taxonomy/role/kbdc_r_ScheduleofInvestmentPortfolioatAmortizedCostandFairValueTable Investments - Schedule of Investment Portfolio at Amortized Cost and Fair Value (Details) Details 36 false false R37.htm 995600 - Disclosure - Investments - Schedule of Composition of Long-Term Investments Based on Fair Value (Details) Sheet http://kaynebdc.com/20260331/taxonomy/role/kbdc_r_ScheduleofCompositionofLongTermInvestmentsBasedonFairValueTable Investments - Schedule of Composition of Long-Term Investments Based on Fair Value (Details) Details 37 false false R38.htm 995610 - Disclosure - Fair Value - Schedule of Fair Value Hierarchy of Investments (Details) Sheet http://kaynebdc.com/20260331/taxonomy/role/kbdc_r_ScheduleofFairValueHierarchyofInvestmentsTable Fair Value - Schedule of Fair Value Hierarchy of Investments (Details) Details 38 false false R39.htm 995620 - Disclosure - Fair Value - Schedule of Fair Value of Investments for which Level 3 Inputs (Details) Sheet http://kaynebdc.com/20260331/taxonomy/role/kbdc_r_ScheduleofFairValueofInvestmentsforwhichLevel3InputsTable Fair Value - Schedule of Fair Value of Investments for which Level 3 Inputs (Details) Details 39 false false R40.htm 995630 - Disclosure - Fair Value - Schedule of Quantitative Information about Significant Unobservable Inputs of the Company???s Level 3 Investments (Details) Sheet http://kaynebdc.com/20260331/taxonomy/role/kbdc_r_ScheduleofQuantitativeInformationaboutSignificantUnobservableInputsoftheCompanysLevel3InvestmentsTable Fair Value - Schedule of Quantitative Information about Significant Unobservable Inputs of the Company???s Level 3 Investments (Details) Details 40 false false R41.htm 995640 - Disclosure - Debt (Details) Sheet http://kaynebdc.com/20260331/taxonomy/role/kbdc_r_DebtDetails Debt (Details) Details http://kaynebdc.com/20260331/taxonomy/role/kbdc_r_DebtTables 41 false false R42.htm 995650 - Disclosure - Debt - Schedule of Series of Notes Outstanding (Details) Notes http://kaynebdc.com/20260331/taxonomy/role/kbdc_r_ScheduleofSeriesofNotesOutstandingTable Debt - Schedule of Series of Notes Outstanding (Details) Details 42 false false R43.htm 995660 - Disclosure - Debt - Schedule of Interest Rate Swaps (Details) Sheet http://kaynebdc.com/20260331/taxonomy/role/DisclosureDebtScheduleOfInterestRateSwapsDetails Debt - Schedule of Interest Rate Swaps (Details) Details 43 false false R44.htm 995670 - Disclosure - Debt - Schedule of Debt Obligations (Details) Sheet http://kaynebdc.com/20260331/taxonomy/role/kbdc_r_ScheduleofDebtObligationsTable Debt - Schedule of Debt Obligations (Details) Details 44 false false R45.htm 995680 - Disclosure - Debt - Schedule of Components of Interest Expense (Details) Sheet http://kaynebdc.com/20260331/taxonomy/role/kbdc_r_ScheduleofComponentsofInterestExpenseTable Debt - Schedule of Components of Interest Expense (Details) Details 45 false false R46.htm 995690 - Disclosure - Common Stock and Share Transactions (Details) Sheet http://kaynebdc.com/20260331/taxonomy/role/kbdc_r_CommonStockandShareTransactionsDetails Common Stock and Share Transactions (Details) Details http://kaynebdc.com/20260331/taxonomy/role/kbdc_r_CommonStockandShareTransactionsTables 46 false false R47.htm 995700 - Disclosure - Common Stock and Share Transactions - Schedule of Repurchased Shares of Common Stock (Details) Sheet http://kaynebdc.com/20260331/taxonomy/role/kbdc_r_ScheduleofRepurchasedSharesofCommonStockTable Common Stock and Share Transactions - Schedule of Repurchased Shares of Common Stock (Details) Details 47 false false R48.htm 995710 - Disclosure - Common Stock and Share Transactions - Schedule of Dividends Declared and Payable by the Company (Details) Sheet http://kaynebdc.com/20260331/taxonomy/role/kbdc_r_ScheduleofDividendsDeclaredandPayablebytheCompanyTable Common Stock and Share Transactions - Schedule of Dividends Declared and Payable by the Company (Details) Details 48 false false R49.htm 995720 - Disclosure - Common Stock and Share Transactions - Schedule of Amounts Received and Shares of Common Stock Issued to Shareholders (Details) Sheet http://kaynebdc.com/20260331/taxonomy/role/kbdc_r_ScheduleofAmountsReceivedandSharesofCommonStockIssuedtoShareholdersTable Common Stock and Share Transactions - Schedule of Amounts Received and Shares of Common Stock Issued to Shareholders (Details) Details 49 false false R50.htm 995730 - Disclosure - Commitments and Contingencies (Details) Sheet http://kaynebdc.com/20260331/taxonomy/role/kbdc_r_CommitmentsandContingenciesDetails Commitments and Contingencies (Details) Details http://kaynebdc.com/20260331/taxonomy/role/kbdc_r_CommitmentsandContingenciesTables 50 false false R51.htm 995740 - Disclosure - Commitments and Contingencies - Schedule of Composition of the Unfunded Commitments (Details) Sheet http://kaynebdc.com/20260331/taxonomy/role/kbdc_r_ScheduleofCompositionoftheUnfundedCommitmentsTable Commitments and Contingencies - Schedule of Composition of the Unfunded Commitments (Details) Details 51 false false R52.htm 995750 - Disclosure - Earnings Per Share (Details) Sheet http://kaynebdc.com/20260331/taxonomy/role/kbdc_r_EarningsPerShareDetails Earnings Per Share (Details) Details http://kaynebdc.com/20260331/taxonomy/role/kbdc_r_EarningsPerShareTables 52 false false R53.htm 995760 - Disclosure - Earnings Per Share - Schedule of Basic and Diluted Earnings Per Share of Common Stock (Details) Sheet http://kaynebdc.com/20260331/taxonomy/role/kbdc_r_ScheduleofBasicandDilutedEarningsPerShareofCommonStockTable Earnings Per Share - Schedule of Basic and Diluted Earnings Per Share of Common Stock (Details) Details 53 false false R54.htm 995780 - Disclosure - Financial Highlights - Schedule of Financial Highlights (Details) Sheet http://kaynebdc.com/20260331/taxonomy/role/kbdc_r_ScheduleofFinancialHighlightsTable Financial Highlights - Schedule of Financial Highlights (Details) Details 54 false false R55.htm 995790 - Disclosure - Financial Highlights - Schedule of Financial Highlights (Parenthetical) (Details) Sheet http://kaynebdc.com/20260331/taxonomy/role/DisclosureFinancialHighlightsScheduleOfFinancialHighlightsParentheticalDetails Financial Highlights - Schedule of Financial Highlights (Parenthetical) (Details) Details 55 false false R56.htm 995800 - Disclosure - Segment Reporting (Details) Sheet http://kaynebdc.com/20260331/taxonomy/role/kbdc_r_SegmentReportingDetails Segment Reporting (Details) Details http://kaynebdc.com/20260331/taxonomy/role/kbdc_r_SegmentReporting 56 false false R57.htm 995810 - Disclosure - Subsequent Events (Details) Sheet http://kaynebdc.com/20260331/taxonomy/role/kbdc_r_SubsequentEventsDetails Subsequent Events (Details) Details http://kaynebdc.com/20260331/taxonomy/role/kbdc_r_SubsequentEvents 57 false false All Reports Book All Reports kbdc-20260331.htm kbdc-20260331.xsd http://fasb.org/srt/2025 http://fasb.org/us-gaap/2025 http://xbrl.sec.gov/cef/2025 http://xbrl.sec.gov/dei/2025 http://xbrl.sec.gov/ecd/2025 false false