Investments - Blue Owl Capital Corporation Senior Loan Fund (Details) - USD ($)	Jul. 26, 2022	Jun. 30, 2021	Sep. 30, 2023		Dec. 31, 2022		Jul. 01, 2021
Net Investment Income [Line Items]
Fair Value			$ 12,896,158,000	[1],[2],[3],[4]	$ 13,010,345,000	[5],[6],[7]
OBDC Senior Loan Fund
Net Investment Income [Line Items]
Total capital commitments, end of period		$ 371,500,000
Fair Value			$ 1,082,711,000		$ 997,385,000
Members | OBDC Senior Loan Fund
Net Investment Income [Line Items]
Total capital commitments, end of period	$ 571,500,000
Blue Owl Capital Corporation Senior Loan Fund
Net Investment Income [Line Items]
Investment, ownership percentage		50.00%					87.50%
Blue Owl Capital Corporation Senior Loan Fund | Regents
Net Investment Income [Line Items]
Investment, ownership percentage		50.00%
Blue Owl Capital Corporation Senior Loan Fund | Nationwide Life Insurance Company
Net Investment Income [Line Items]
Investment, ownership percentage		12.50%

[1] Certain portfolio company investments are subject to contractual restrictions on sales. Refer to footnote 28 for additional information on our restricted securities.

[2] Unless otherwise indicated, all investments are considered Level 3 investments.

[3] Unless otherwise indicated, loan contains a variable rate structure and may be subject to an interest rate floor. Variable rate loans bear interest at a rate that may be determined by reference to either the Secured Overnight Financing Rate ("SOFR" or "S," which can include one-, three- or six- month SOFR), London Interbank Offered Rate (“LIBOR” or “L”, which can include one-, three- or six- month LIBOR), Euro Interbank Offered Rate (“EURIBOR”), Great Britain Pound London Interbank Offered Rate (“GBPLIBOR” or “G”, which can include three- or six-month GBPLIBOR), SONIA ("SONIA” or "SA") or an alternate base rate (which can include the Federal Funds Effective Rate or the Prime Rate), at the borrower’s option, and which reset periodically based on the terms of the loan agreement.

[4] Unless otherwise indicated, the Company’s portfolio companies are pledged as collateral supporting the amounts outstanding under the Revolving Credit Facility, SPV Asset Facilities and CLOs. See Note 6 “Debt”.

[5] Certain portfolio company investments are subject to contractual restrictions on sales. Refer to footnote 28 for additional information on our restricted securities.

[6] Unless otherwise indicated, all investments are considered Level 3 investments.

[7] Unless otherwise indicated, the Company’s portfolio companies are pledged as collateral supporting the amounts outstanding under the Revolving Credit Facility, SPV Asset Facilities and CLOs. See Note 6 “Debt”.