Investments and Fair Value Measurements - Summary of Valuation Techniques and Significant Unobservable Inputs Used in Valuation of Level 3 Investments (Details) - Level 3	3 Months Ended	12 Months Ended
	Mar. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 375,590,586	$ 410,096,869
Enterprise Value Waterfall \| EBITDA Multiple
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	900,000	25,500,000
Senior Secured Loans \| Discounted Cash Flow \| Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 300,805,181	$ 327,406,701
Impact to valuation from an increase in input	Decrease	Decrease
Senior Secured Loans \| Discounted Cash Flow \| Discount Rate \| Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Range	4.8	4.8
Senior Secured Loans \| Discounted Cash Flow \| Discount Rate \| Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Range	9.3	9.2
Senior Secured Loans \| Discounted Cash Flow \| Discount Rate \| Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Range	6.4	6.3
Senior Secured Loans \| Yield Analysis \| Market Yield
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 46,237,178	$ 49,361,964
Impact to valuation from an increase in input	Decrease	Decrease
Senior Secured Loans \| Yield Analysis \| Market Yield \| Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Range	9.9	10.3
Senior Secured Loans \| Yield Analysis \| Market Yield \| Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Range	16.9	13.3
Senior Secured Loans \| Yield Analysis \| Market Yield \| Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Range	12.1	12.3
Senior Secured Loans \| Recent Transactions \| Transaction Price
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 1,187,721	$ 1,898,077
Senior Secured Loans \| Enterprise Value Waterfall \| EBITDA Multiple
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 21,720,282	$ 25,468,528
Impact to valuation from an increase in input	Increase	Increase
Senior Secured Loans \| Enterprise Value Waterfall \| EBITDA Multiple \| Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Range	9.3	9.8
Senior Secured Loans \| Enterprise Value Waterfall \| EBITDA Multiple \| Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Range	11.6	13.1
Senior Secured Loans \| Enterprise Value Waterfall \| EBITDA Multiple \| Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Range	11.5	12.3
Equity \| Recent Transactions \| Transaction Price
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 868,840
Equity \| Enterprise Value Waterfall \| EBITDA Multiple
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 4,771,384	$ 5,961,599
Impact to valuation from an increase in input	Increase	Increase
Equity \| Enterprise Value Waterfall \| EBITDA Multiple \| Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Range	8.8	8.6
Equity \| Enterprise Value Waterfall \| EBITDA Multiple \| Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Range	14.3	14.6
Equity \| Enterprise Value Waterfall \| EBITDA Multiple \| Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Range	13.4	12.2

Onex Direct Lending BDC Fund 10-Q