Investments - Geographic Composition of Investments (Details) - USD ($)
$ in Thousands

Mar. 31, 2026

Dec. 31, 2025

Schedule of Investments [Line Items]

$ 25,063,146

^[1]

$ 25,109,408

^[2]

$ 25,007,853

$ 25,337,420

% of Total Investments at Fair Value

100.00%

100.00%

Fair Value as % of Net Assets

201.09%

203.71%

Schedule of Investments [Line Items]

$ 20,899,378

$ 20,799,766

$ 20,702,850

$ 20,802,415

% of Total Investments at Fair Value

82.78%

82.10%

Fair Value as % of Net Assets

166.49%

167.26%

Schedule of Investments [Line Items]

$ 1,534,392

$ 1,699,572

$ 1,599,875

$ 1,802,207

% of Total Investments at Fair Value

6.40%

7.11%

Fair Value as % of Net Assets

12.87%

14.49%

Schedule of Investments [Line Items]

$ 552,156

$ 549,232

$ 566,310

$ 577,532

% of Total Investments at Fair Value

2.26%

2.28%

Fair Value as % of Net Assets

4.55%

4.64%

Schedule of Investments [Line Items]

$ 310,710

$ 259,311

$ 331,602

$ 287,386

% of Total Investments at Fair Value

1.33%

1.13%

Fair Value as % of Net Assets

2.67%

2.31%

Schedule of Investments [Line Items]

$ 313,343

$ 398,668

$ 313,719

$ 401,762

% of Total Investments at Fair Value

1.25%

1.59%

Fair Value as % of Net Assets

2.52%

3.23%

Schedule of Investments [Line Items]

$ 261,623

$ 247,547

$ 276,467

$ 267,864

% of Total Investments at Fair Value

1.11%

1.06%

Fair Value as % of Net Assets

2.22%

2.15%

Schedule of Investments [Line Items]

$ 254,743

$ 287,473

$ 265,342

$ 305,802

% of Total Investments at Fair Value

1.06%

1.21%

Fair Value as % of Net Assets

2.13%

2.46%

Schedule of Investments [Line Items]

$ 262,767

$ 176,733

$ 259,062

$ 176,307

% of Total Investments at Fair Value

1.04%

0.70%

Fair Value as % of Net Assets

2.08%

1.42%

Schedule of Investments [Line Items]

$ 152,711

$ 151,387

$ 168,355

$ 170,687

% of Total Investments at Fair Value

0.67%

0.67%

Fair Value as % of Net Assets

1.35%

1.37%

Schedule of Investments [Line Items]

$ 164,267

$ 164,159

$ 163,442

$ 165,484

% of Total Investments at Fair Value

0.65%

0.65%

Fair Value as % of Net Assets

1.31%

1.33%

Schedule of Investments [Line Items]

$ 135,242

$ 135,156

$ 134,559

$ 137,800

% of Total Investments at Fair Value

0.54%

0.54%

Fair Value as % of Net Assets

1.08%

1.11%

Schedule of Investments [Line Items]

$ 49,741

$ 49,155

$ 50,202

$ 49,685

% of Total Investments at Fair Value

0.20%

0.20%

Fair Value as % of Net Assets

0.40%

0.40%

Schedule of Investments [Line Items]

$ 50,756

$ 52,597

$ 48,892

$ 43,184

% of Total Investments at Fair Value

0.20%

0.17%

Fair Value as % of Net Assets

0.39%

0.35%

Schedule of Investments [Line Items]

$ 45,388

$ 45,378

$ 44,389

$ 45,382

% of Total Investments at Fair Value

0.18%

0.18%

Fair Value as % of Net Assets

0.36%

0.36%

Schedule of Investments [Line Items]

$ 37,711

$ 54,856

$ 43,056

$ 63,706

% of Total Investments at Fair Value

0.17%

0.25%

Fair Value as % of Net Assets

0.35%

0.51%

Schedule of Investments [Line Items]

$ 33,257

$ 33,198

$ 34,946

$ 34,946

% of Total Investments at Fair Value

0.14%

0.14%

Fair Value as % of Net Assets

0.28%

0.28%

Schedule of Investments [Line Items]

$ 2,941

$ 2,947

$ 2,762

$ 2,973

% of Total Investments at Fair Value

0.01%

0.01%

Fair Value as % of Net Assets

0.02%

0.02%

Schedule of Investments [Line Items]

$ 2,020

$ 2,273

$ 2,023

$ 2,298

% of Total Investments at Fair Value

0.01%

0.01%

Fair Value as % of Net Assets

0.02%

0.02%

[1]	The cost represents the original cost adjusted for the amortization of discounts and premiums, as applicable, on debt investments using the effective interest method in accordance with U.S. GAAP.
[2]	The cost represents the original cost adjusted for the amortization of discounts and premiums, as applicable, on debt investments using the effective interest method in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”).