Commitment and Contingencies - Narrative (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Other Commitments [Line Items]
Estimated unfunded commitments	$ 130.2	$ 399.5
Remaining uncalled commitments	536.7	340.8
Delayed Draw Term Loans And Revolvers
Other Commitments [Line Items]
Unfunded commitments	$ 10,804.0	$ 5,370.8

Investment Company, Financial Commitment to Investee, Estimated Future Amount

No definition available.

Name:	bcred_InvestmentCompanyFinancialCommitmentToInvesteeEstimatedFutureAmount
Namespace Prefix:	bcred_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Investment Company, Financial Commitment to Investee, Uncalled Commitment

+ References

No definition available.

+ Details

Name:	bcred_InvestmentCompanyFinancialCommitmentToInvesteeUncalledCommitment
Namespace Prefix:	bcred_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of financial support committed by investment company to investee that is contractually required but not provided.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 16
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480990/946-20-50-16

+ Details

Name:	us-gaap_InvestmentCompanyFinancialCommitmentToInvesteeFutureAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_OtherCommitmentsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_OtherCommitmentsAxis=bcred_DelayedDrawTermLoansAndRevolversMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: