Date the declared dividend will be paid, in YYYY-MM-DD format.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482913/230-10-50-3

+ Details

Name:	us-gaap_DividendPayableDateToBePaidDayMonthAndYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

The per share amount of a dividend declared, but not paid, as of the financial reporting date.

+ References

+ Details

Name:	us-gaap_DividendsPayableAmountPerShare
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Date the dividend to be paid was declared, in YYYY-MM-DD format.

+ References

+ Details

Name:	us-gaap_DividendsPayableDateDeclaredDayMonthAndYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Date the holder must own the stock to be entitled to the dividend, in YYYY-MM-DD format.

+ References

+ Details

Name:	us-gaap_DividendsPayableDateOfRecordDayMonthAndYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- 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

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 15
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-15

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482913/230-10-50-3

+ Details

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

- Definition

Describes the declaration as being a special dividend (over and above the normal dividend); as the annual, semi-annual, quarterly dividend, or other normal periodic dividend; or as some other type of dividend.

+ References

+ Details

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

- Details

Name:	us-gaap_DividendsAxis=ck0001925309_O2026Q1BaseDividendsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DividendsAxis=ck0001925309_O2026Q2BaseDividendsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DividendsAxis=ck0001925309_O2025Q1BaseDividendsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DividendsAxis=ck0001925309_O2025Q2BaseDividendsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DividendsAxis=ck0001925309_O2025Q1DividendsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Dividends - Summary of Dividends Declared (Details) - $ / shares	Jun. 30, 2026	Mar. 31, 2026	Jun. 30, 2025	Mar. 31, 2025	Aug. 06, 2026	May 07, 2026	Aug. 04, 2025	May 05, 2025
Dividends Payable [Line Items]
Dividend per Share	$ 1.4		$ 1.37
O2026 Q1 Base Dividends [Member]
Dividends Payable [Line Items]
Date Declared		Mar. 31, 2026
Dividend		Base
Record Date		Mar. 31, 2026
Payment Date		May 07, 2026
Dividend per Share						$ 0.7
O2026 Q2 Base Dividends [Member]
Dividends Payable [Line Items]
Date Declared	Jun. 30, 2026
Dividend	Base
Record Date	Jun. 30, 2026
Payment Date	Aug. 06, 2026
O2026 Q2 Base Dividends [Member] \| Subsequent Event [Member]
Dividends Payable [Line Items]
Dividend per Share					$ 0.7
O2025 Q1 Base Dividends [Member]
Dividends Payable [Line Items]
Date Declared				Mar. 31, 2025
Dividend				Base
Record Date				Mar. 31, 2025
Payment Date				May 05, 2025
Dividend per Share								$ 0.67
O2025 Q2 Base Dividends [Member]
Dividends Payable [Line Items]
Date Declared			Jun. 30, 2025
Dividend			Base
Record Date			Jun. 30, 2025
Payment Date			Aug. 04, 2025
Dividend per Share							$ 0.7
O2025 Q1 Dividends [Member]
Dividends Payable [Line Items]
Date Declared				Mar. 31, 2025
Record Date				Mar. 31, 2025