Consolidated Statements of Assets and Liabilities (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2024		Dec. 31, 2023
Amortized Cost	$ 12,328,887	[1],[2],[3],[4],[5],[6]	$ 12,632,202	[7],[8],[9],[10],[11],[12]
Restricted cash	89,838		87,067
Foreign cash, cost	76,145		946
Unamortized debt issuance costs	$ 90,019		$ 81,492
Common stock, par value (in usd per share)	$ 0.01		$ 0.01
Common stock, shares authorized (in shares)	500,000,000		500,000,000
Common stock, shares, issued (in shares)	389,732,868		389,732,868
Common stock, shares outstanding (in shares)	389,732,868		389,732,868
Investment income from non-controlled, non-affiliated investments:
Amortized Cost	$ 10,843,376		$ 11,271,962
Non-controlled, affiliated investments
Amortized Cost	31,026		19,004
Investment income from controlled, affiliated investments:
Amortized Cost	$ 1,454,485		$ 1,341,236

[1] 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), Euro Interbank Offered Rate (“EURIBOR”), 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.

[2] As of March 31, 2024, the net estimated unrealized gain for U.S. federal income tax purposes was $15.3 million based on a tax cost basis of $12.4 billion. As of March 31, 2024, the estimated aggregate gross unrealized loss for U.S. federal income tax purposes was $335.5 million and the estimated aggregate gross unrealized gain for U.S. federal income tax purposes was $350.8 million.

[3] The amortized cost represents the original cost adjusted for the amortization or accretion of premium or discount, as applicable, on debt investments using the effective interest method.

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

[5] Unless otherwise indicated, the Company’s portfolio companies are pledged as collateral supporting the amounts outstanding under the Revolving Credit Facility, SPV Asset Facility and CLOs. See Note 5 “Debt”.

[6] Certain portfolio company investments are subject to contractual restrictions on sales. Refer to footnote 27 for additional information on our restricted securities.

[7] 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), 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.

[8] As of December 31, 2023, the net estimated unrealized loss for U.S. federal income tax purposes was $0.4 million based on a tax cost basis of $12.7 billion. As of December 31, 2023, the estimated aggregate gross unrealized loss for U.S. federal income tax purposes was $325.3 million and the estimated aggregate gross unrealized gain for U.S. federal income tax purposes was $324.9 million.

[9] The amortized cost represents the original cost adjusted for the amortization or accretion of premium or discount, as applicable, on debt investments using the effective interest method.

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

[11] Unless otherwise indicated, the Company’s portfolio companies are pledged as collateral supporting the amounts outstanding under the Revolving Credit Facility, SPV Asset Facility and CLOs. See Note 5 “Debt”.

[12] Certain portfolio company investments are subject to contractual restrictions on sales. Refer to footnote 26 for additional information on our restricted securities.