Debt Instrument, Draw Period

No definition available.

Name:	ortf_DebtInstrumentDrawPeriod
Namespace Prefix:	ortf_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Line Of Credit Facility Drawn Amount Threshold Percentage

+ References

No definition available.

+ Details

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Namespace Prefix:	ortf_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Line of Credit Facility, Maximum Borrowing Capacity, Including Accordion Feature

+ References

No definition available.

+ Details

Name:	ortf_LineOfCreditFacilityMaximumBorrowingCapacityIncludingAccordionFeature
Namespace Prefix:	ortf_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
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

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+ Details

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

- Definition

The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityCommitmentFeePercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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

- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_DebtInstrumentAxis=ortf_SPVAssetFacilityIMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_LineOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_SecuredDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=ortf_SPVAssetFacilityIIMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Period Type:

- Details

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Period Type:

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=ortf_SPVAssetFacilityIIIMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
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Balance Type:
Period Type:

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

Debt - SPV Asset Facilities (Details) - Line of Credit - USD ($)	Aug. 14, 2026	May 21, 2026	Aug. 20, 2024	Dec. 22, 2022	Jul. 15, 2022	Nov. 16, 2021	Sep. 30, 2026	Dec. 31, 2025	Oct. 30, 2024	Nov. 08, 2022
SPV Asset Facility I
Debt Instrument [Line Items]
Aggregate Principal Committed				$ 700,000,000.0			$ 700,000,000	$ 700,000,000
Draw period				3 years
SPV Asset Facility I \| Secured Debt
Debt Instrument [Line Items]
Basis spread on variable rate				2.25%
SPV Asset Facility II
Debt Instrument [Line Items]
Aggregate Principal Committed						$ 400,000,000	400,000,000	400,000,000	$ 300,000,000.0
Basis spread on variable rate						2.00%
Fee on unused portion of credit facility						20.00%
SPV Asset Facility II \| Minimum
Debt Instrument [Line Items]
Basis spread on variable rate						65.00%
SPV Asset Facility II \| Maximum
Debt Instrument [Line Items]
Basis spread on variable rate						75.00%
SPV Asset Facility II \| Secured Debt \| Commitment Fee, First Twelve Months
Debt Instrument [Line Items]
Fee on unused portion of credit facility						0.50%
SPV Asset Facility V
Debt Instrument [Line Items]
Aggregate Principal Committed		$ 250,000,000.0					250,000,000
Draw period		3 years
SPV Asset Facility V \| Maximum
Debt Instrument [Line Items]
Basis spread on variable rate		0.15%
SPV Asset Facility V \| Secured Debt
Debt Instrument [Line Items]
Basis spread on variable rate		2.10%
Fee on unused portion of credit facility		0.25%
SPV Asset Facility VI
Debt Instrument [Line Items]
Aggregate Principal Committed	$ 250,000,000.0						250,000,000
SPV Asset Facility VI \| Secured Debt
Debt Instrument [Line Items]
Basis spread on variable rate	2.25%
Fee on unused portion of credit facility	0.50%
Line of credit facility drawn amount threshold percentage	50.00%
Line of credit facility, commitment fee percentage	0.15%
SPV Asset Facility III
Debt Instrument [Line Items]
Aggregate Principal Committed					$ 1,100,000,000		1,100,000,000	1,100,000,000
Line of credit facility, including the accordion feature							1,500,000,000
SPV Asset Facility III \| Secured Debt
Debt Instrument [Line Items]
Basis spread on variable rate					2.05%
SPV Asset Facility III \| Secured Debt \| Commitment Fee, First Twelve Months
Debt Instrument [Line Items]
Fee on unused portion of credit facility					0.25%
SPV Asset Facility III \| Revolving loan commitments
Debt Instrument [Line Items]
Fee on unused portion of credit facility					1.00%
SPV Asset Facility IV
Debt Instrument [Line Items]
Aggregate Principal Committed							$ 500,000,000	$ 500,000,000		$ 500,000,000.0
SPV Asset Facility IV \| Minimum
Debt Instrument [Line Items]
Basis spread on variable rate			2.00%
Fee on unused portion of credit facility			0.25%
SPV Asset Facility IV \| Maximum
Debt Instrument [Line Items]
Basis spread on variable rate			2.35%
Fee on unused portion of credit facility			0.50%