XML 70 R57.htm IDEA: XBRL DOCUMENT
v3.23.1

Net Assets - Shareholder Transfer Restrictions (Details) - shares | 1 Months Ended | 2 Months Ended |  |
--- | --- | --- | --- | ---
Jan. 28, 2022 | Jun. 30, 2022 | Apr. 30, 2022 | Feb. 28, 2022 | Jan. 03, 2022
Subsidiary or Equity Method Investee [Line Items] |  |  |  |  |
Percentage of shares restriction | 90.00% | 50.00% | 75.00% |  |
Initial Public Offering, Shareholder Transfer Restrictions |  |  |  |  |
Subsidiary or Equity Method Investee [Line Items] |  |  |  |  |
Investment owned (in shares) |  | 50 | 25 | 10 | 100

X
- Definition Initial Public Offering, Shareholder Transfer Restrictions, Percentage Of Share Transfer Restriction + References No definition available. + Details
Name: | bxsl_InitialPublicOfferingShareholderTransferRestrictionsPercentageOfShareTransferRestriction
Namespace Prefix: | bxsl_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Balance held at close of period in number of shares. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 210 -Section 50 -Paragraph 6 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=99383244&loc=d3e12121-115841 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-12B(Column B)) -URI https://asc.fasb.org/extlink&oid=122147990&loc=d3e611197-123010 + Details
Name: | us-gaap_InvestmentOwnedBalanceShares
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- 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_SubsidiaryOrEquityMethodInvesteeLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | bxsl_TransferRestrictionsAxis=bxsl_InitialPublicOfferingShareholderTransferRestrictionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |