v3.26.1
Condensed Consolidated Schedules of Investments (Parenthetical) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Schedule of Investments [Line Items]    
Cost $ 1,913,693 $ 1,453,089
Fair Value as a Percentage of Net Assets 104.70% [1] 90.70% [2]
Investment owned at fair value $ 2,101,797 $ 1,575,363
Series I Partnership Investment Vehicle [Member]    
Schedule of Investments [Line Items]    
Cost $ 421,757 $ 299,438
Fair Value as a Percentage of Net Assets 82.40% [1],[3] 65.00% [2],[4]
Investment owned at fair value $ 475,273 [3] $ 333,548 [4]
Series I Investment Loan [Member]    
Schedule of Investments [Line Items]    
Cost $ 132,803 $ 134,415
Fair Value as a Percentage of Net Assets 23.10% [1] 26.30% [2]
Investment owned at fair value $ 133,103 $ 134,855
Series I Investment [Member]    
Schedule of Investments [Line Items]    
Cost $ 554,560 $ 433,853
Fair Value as a Percentage of Net Assets 105.50% [1] 91.30% [2]
Investment owned at fair value $ 608,376 $ 468,403
Series I Derivative Assets Liabilities [Member]    
Schedule of Investments [Line Items]    
Cost 554,560  
Series II Partnership Investment Vehicle [Member]    
Schedule of Investments [Line Items]    
Cost $ 1,036,071 $ 703,624
Fair Value as a Percentage of Net Assets 81.60% [1],[3] 64.50% [2],[4]
Investment owned at fair value $ 1,166,689 [3] $ 788,260 [4]
Series II Investment Loan [Member]    
Schedule of Investments [Line Items]    
Cost $ 323,062 $ 315,612
Fair Value as a Percentage of Net Assets 22.80% [1] 26.10% [2]
Investment owned at fair value $ 326,732 $ 318,700
Series II Investment [Member]    
Schedule of Investments [Line Items]    
Cost $ 1,359,133 $ 1,019,236
Fair Value as a Percentage of Net Assets 104.40% [1] 90.60% [2]
Investment owned at fair value $ 1,493,421 $ 1,106,960
Partnership Investment Vehicle [Member]    
Schedule of Investments [Line Items]    
Cost $ 1,457,828 $ 1,003,062
Fair Value as a Percentage of Net Assets 81.90% [1],[3] 64.60% [2],[4]
Investment owned at fair value $ 1,641,962 [3] $ 1,121,808 [4]
Investment Loan [Member]    
Schedule of Investments [Line Items]    
Cost $ 455,865 $ 450,027
Fair Value as a Percentage of Net Assets 22.80% [1] 26.10% [2]
Investment owned at fair value $ 459,835 $ 453,555
Series I Investments Derivative Assets and Derivative Liabilities [Member]    
Schedule of Investments [Line Items]    
Cost   433,853
Series II Investment And Derivative Assets Liabilities [Member]    
Schedule of Investments [Line Items]    
Cost 1,359,133 1,019,236
Investments, Derivative Assets and Derivative Liabilities [Member]    
Schedule of Investments [Line Items]    
Cost $ 1,913,693 $ 1,453,089
Maximum [Member]    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets 5.00% 5.00%
Pembina Gas Infrastructure Inc [Member] | Series I [Member]    
Schedule of Investments [Line Items]    
Investment owned number of shares 49,599,116  
Fair Value as a Percentage of Net Assets 8.50%  
Investment owned at fair value $ 49,552  
Pembina Gas Infrastructure Inc [Member] | Series II [Member]    
Schedule of Investments [Line Items]    
Investment owned number of shares 121,754,312  
Fair Value as a Percentage of Net Assets 8.50%  
Investment owned at fair value $ 121,639  
Pembina Gas Infrastructure Inc [Member] | Apollo Infrastructure LLC [Member]    
Schedule of Investments [Line Items]    
Investment owned number of shares 171,353,428  
Fair Value as a Percentage of Net Assets 8.50%  
Investment owned at fair value $ 171,191  
Eagle Creek Holdings, LLC [Member] | Series I [Member]    
Schedule of Investments [Line Items]    
Investment owned number of shares 43,418,259  
Fair Value as a Percentage of Net Assets 8.00%  
Investment owned at fair value $ 46,232  
Eagle Creek Holdings, LLC [Member] | Series II [Member]    
Schedule of Investments [Line Items]    
Investment owned number of shares 106,581,741  
Fair Value as a Percentage of Net Assets 8.00%  
Investment owned at fair value $ 113,489  
Eagle Creek Holdings, LLC [Member] | Apollo Infrastructure LLC [Member]    
Schedule of Investments [Line Items]    
Investment owned number of shares 150,000,000  
Fair Value as a Percentage of Net Assets 8.00%  
Investment owned at fair value $ 159,721  
Aegis TopCo S.a.r.l. [Member] | Series I [Member]    
Schedule of Investments [Line Items]    
Investment owned number of shares 353,920,082 363,550,624
Fair Value as a Percentage of Net Assets 7.20% 7.80%
Investment owned at fair value $ 41,289 $ 39,726
Aegis TopCo S.a.r.l. [Member] | Series II [Member]    
Schedule of Investments [Line Items]    
Investment owned number of shares 868,791,607 859,161,065
Fair Value as a Percentage of Net Assets 7.20% 7.80%
Investment owned at fair value $ 101,356 $ 93,883
Aegis TopCo S.a.r.l. [Member] | Apollo Infrastructure LLC [Member]    
Schedule of Investments [Line Items]    
Investment owned number of shares 1,222,711,689 1,222,711,689
Fair Value as a Percentage of Net Assets 7.20% 7.80%
Investment owned at fair value $ 142,645 $ 133,609
Watco Companies LLC [Member] | Series I [Member]    
Schedule of Investments [Line Items]    
Investment owned number of shares 2,895  
Fair Value as a Percentage of Net Assets 5.00% 5.70%
Investment owned at fair value $ 29,320 $ 29,361
Watco Companies LLC [Member] | Series II [Member]    
Schedule of Investments [Line Items]    
Investment owned number of shares 7,105  
Fair Value as a Percentage of Net Assets 5.00% 5.70%
Investment owned at fair value $ 71,974 $ 69,389
Watco Companies LLC [Member] | Apollo Infrastructure LLC [Member]    
Schedule of Investments [Line Items]    
Investment owned number of shares 10,000  
Fair Value as a Percentage of Net Assets 5.00% 5.70%
Investment owned at fair value $ 101,294 $ 98,750
AP Hercules UK Ltd [Member] | Series I [Member]    
Schedule of Investments [Line Items]    
Investment owned number of shares   24,570,172
Fair Value as a Percentage of Net Assets   5.20%
Investment owned at fair value   $ 26,843
AP Hercules UK Ltd [Member] | Series II [Member]    
Schedule of Investments [Line Items]    
Investment owned number of shares   58,065,463
Fair Value as a Percentage of Net Assets   5.20%
Investment owned at fair value   $ 63,436
AP Hercules UK Ltd [Member] | Apollo Infrastructure LLC [Member]    
Schedule of Investments [Line Items]    
Investment owned number of shares   82,635,635
Fair Value as a Percentage of Net Assets   5.20%
Investment owned at fair value   $ 90,279
AP Ballast, L.P. [Member] | Series I [Member]    
Schedule of Investments [Line Items]    
Investment owned number of shares   2,973
AP Ballast, L.P. [Member] | Series II [Member]    
Schedule of Investments [Line Items]    
Investment owned number of shares   7,027
AP Ballast, L.P. [Member] | Apollo Infrastructure LLC [Member]    
Schedule of Investments [Line Items]    
Investment owned number of shares   10,000
Investment, Identifier [Axis]: Series I | Investments in Loans | Other Infrastructure Assets | Europe | Digital    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets 1.20% [1] 1.40% [2]
Investment owned at fair value $ 6,804 $ 7,172
Investment, Identifier [Axis]: Series I | Investments in Loans | Other Infrastructure Assets | United States | Digital    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets 10.30% [1],[5] 9.60% [2],[6]
Investment owned at fair value $ 59,542 [5] $ 49,102 [6]
Investment, Identifier [Axis]: Series I | Investments in Loans | Other Infrastructure Assets | United States | Power & Utilities    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets 5.10% [1],[5] 11.00% [2],[6]
Investment owned at fair value $ 29,203 [5] $ 56,406 [6]
Investment, Identifier [Axis]: Series I | Investments in Loans | Other Infrastructure Assets | United States | Transportation    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets 3.70% [1] 2.80% [2]
Investment owned at fair value $ 21,187 $ 14,273
Investment, Identifier [Axis]: Series I | Investments in Loans | Other Infrastructure Assets | Various | Digital    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets 1.60% [1] 0.20% [2]
Investment owned at fair value $ 9,304 $ 1,082
Investment, Identifier [Axis]: Series I | Investments in Loans | Other Infrastructure Assets | Various | Transportation    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets 1.20% [1] 1.30% [2]
Investment owned at fair value $ 7,063 $ 6,820
Investment, Identifier [Axis]: Series I | Investments in Partnership Investment Vehicle | AIC 3-Z Subsidiary, LLC | United States | Various    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets 8.30% [1],[3],[7] 8.50% [2],[4],[8]
Investment owned at fair value $ 47,575 [3],[7] $ 43,483 [4],[8]
Investment, Identifier [Axis]: Series I | Investments in Partnership Investment Vehicle | AP Aegis Aggregator, SCSp | Europe | Digital    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets 7.20% [1],[3],[9] 7.80% [2],[4],[10]
Investment owned at fair value $ 41,358 [3],[9] $ 39,802 [4],[10]
Investment, Identifier [Axis]: Series I | Investments in Partnership Investment Vehicle | AP Ballast, L.P. | United States | Transportation    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets 5.10% [1],[3],[11] 5.70% [2],[4],[12]
Investment owned at fair value $ 29,314 [3],[11] $ 29,363 [4],[12]
Investment, Identifier [Axis]: Series I | Investments in Partnership Investment Vehicle | AP Hercules Aggregator, SCSp | Norway | Transportation    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets [2],[4],[13]   5.20%
Investment owned at fair value [4],[13]   $ 26,814
Investment, Identifier [Axis]: Series I | Investments in Partnership Investment Vehicle | AP Jaguar Holdings, LLC | United States | Power & Utilities    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets [1],[3],[14] 8.00%  
Investment owned at fair value [3],[14] $ 46,237  
Investment, Identifier [Axis]: Series I | Investments in Partnership Investment Vehicle | AP Pegasus Holdings , SCSP | Canada | Power & Utilities    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets [1],[3],[15] 8.60%  
Investment owned at fair value [3],[15] $ 49,552  
Investment, Identifier [Axis]: Series I | Investments in Partnership Investment Vehicle | Novus Holdings Parent, L.P. | United States | Transportation    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets 7.20% [1],[3] 7.50% [2],[4]
Investment owned at fair value $ 41,768 [3] $ 38,435 [4]
Investment, Identifier [Axis]: Series I | Investments in Partnership Investment Vehicle | Other Infrastructure Assets | Canada | Social    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets 3.10% [1],[3] 3.40% [2],[4]
Investment owned at fair value $ 17,858 [3] $ 17,507 [4]
Investment, Identifier [Axis]: Series I | Investments in Partnership Investment Vehicle | Other Infrastructure Assets | Norway | Transportation    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets [1],[3] 4.70%  
Investment owned at fair value [3] $ 27,169  
Investment, Identifier [Axis]: Series I | Investments in Partnership Investment Vehicle | Other Infrastructure Assets | United States | Digital    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets 3.80% [1],[3] 1.70% [2],[4]
Investment owned at fair value $ 21,855 [3] $ 8,767 [4]
Investment, Identifier [Axis]: Series I | Investments in Partnership Investment Vehicle | Other Infrastructure Assets | United States | Power & Utilities    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets 12.50% [1],[3],[5] 13.50% [2],[4],[6]
Investment owned at fair value $ 72,074 [3],[5] $ 69,390 [4],[6]
Investment, Identifier [Axis]: Series I | Investments in Partnership Investment Vehicle | Other Infrastructure Assets | United States | Social    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets [1],[3] 3.80%  
Investment owned at fair value [3] $ 22,032  
Investment, Identifier [Axis]: Series I | Investments in Partnership Investment Vehicle | Other Infrastructure Assets | United States | Transportation    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets 4.60% [1],[3] 5.50% [2],[4],[6]
Investment owned at fair value $ 26,736 [3] $ 28,132 [4],[6]
Investment, Identifier [Axis]: Series I | Investments in Partnership Investment Vehicle | Phoebe JV Energy, LLC | United States | Power & Utilities    
Schedule of Investments [Line Items]    
Investment owned number of shares 19,526 [3] 20,057 [4]
Fair Value as a Percentage of Net Assets 5.50% [1],[3] 6.20% [2],[4]
Investment owned at fair value $ 31,745 [3] $ 31,855 [4]
Investment, Identifier [Axis]: Series II | Investments in Loans | Other Infrastructure Assets | Europe | Digital    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets 1.20% [1] 1.40% [2]
Investment owned at fair value $ 16,702 $ 16,950
Investment, Identifier [Axis]: Series II | Investments in Loans | Other Infrastructure Assets | United States | Digital    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets 10.20% [1],[5] 9.50% [2],[6]
Investment owned at fair value $ 146,160 [5] $ 116,043 [6]
Investment, Identifier [Axis]: Series II | Investments in Loans | Other Infrastructure Assets | United States | Power & Utilities    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets 5.00% [1],[5] 10.90% [2],[6]
Investment owned at fair value $ 71,686 [5] $ 133,305 [6]
Investment, Identifier [Axis]: Series II | Investments in Loans | Other Infrastructure Assets | United States | Transportation    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets 3.60% [1] 2.80% [2]
Investment owned at fair value $ 52,009 $ 33,730
Investment, Identifier [Axis]: Series II | Investments in Loans | Other Infrastructure Assets | Various | Digital    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets 1.60% [1] 0.20% [2]
Investment owned at fair value $ 22,838 $ 2,556
Investment, Identifier [Axis]: Series II | Investments in Loans | Other Infrastructure Assets | Various | Transportation    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets 1.20% [1] 1.30% [2]
Investment owned at fair value $ 17,337 $ 16,116
Investment, Identifier [Axis]: Series II | Investments in Partnership Investment Vehicle | AIC 3-Z Subsidiary, LLC | United States | Various    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets 8.20% [1],[3],[7] 8.40% [2],[4],[8]
Investment owned at fair value $ 116,785 [3],[7] $ 102,764 [4],[8]
Investment, Identifier [Axis]: Series II | Investments in Partnership Investment Vehicle | AP Aegis Aggregator, SCSp | Europe | Digital    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets 7.10% [1],[3],[9] 7.70% [2],[4],[10]
Investment owned at fair value $ 101,524 [3],[9] $ 94,061 [4],[10]
Investment, Identifier [Axis]: Series II | Investments in Partnership Investment Vehicle | AP Ballast, L.P. | United States | Transportation    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets 5.00% [1],[3],[11] 5.70% [2],[4],[12]
Investment owned at fair value $ 71,958 [3],[11] $ 69,391 [4],[12]
Investment, Identifier [Axis]: Series II | Investments in Partnership Investment Vehicle | AP Hercules Aggregator, SCSp | Norway | Transportation    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets [2],[4],[13]   5.20%
Investment owned at fair value [4],[13]   $ 63,367
Investment, Identifier [Axis]: Series II | Investments in Partnership Investment Vehicle | AP Jaguar Holdings, LLC | United States | Power & Utilities    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets [1],[3],[14] 7.90%  
Investment owned at fair value [3],[14] $ 113,501  
Investment, Identifier [Axis]: Series II | Investments in Partnership Investment Vehicle | AP Pegasus Holdings , SCSP | Canada | Power & Utilities    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets [1],[3],[15] 8.50%  
Investment owned at fair value [3],[15] $ 121,639  
Investment, Identifier [Axis]: Series II | Investments in Partnership Investment Vehicle | Novus Holdings Parent, L.P. | United States | Transportation    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets 7.20% [1],[3] 7.40% [2],[4]
Investment owned at fair value $ 102,530 [3] $ 90,832 [4]
Investment, Identifier [Axis]: Series II | Investments in Partnership Investment Vehicle | Other Infrastructure Assets | Canada | Social    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets 3.10% [1],[3] 3.40% [2],[4]
Investment owned at fair value $ 43,838 [3] $ 41,374 [4]
Investment, Identifier [Axis]: Series II | Investments in Partnership Investment Vehicle | Other Infrastructure Assets | Norway | Transportation    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets [1],[3] 4.70%  
Investment owned at fair value [3] $ 66,693  
Investment, Identifier [Axis]: Series II | Investments in Partnership Investment Vehicle | Other Infrastructure Assets | United States | Digital    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets 3.70% [1],[3] 1.70% [2],[4]
Investment owned at fair value $ 53,648 [3] $ 20,719 [4]
Investment, Identifier [Axis]: Series II | Investments in Partnership Investment Vehicle | Other Infrastructure Assets | United States | Power & Utilities    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets 12.40% [1],[3],[5] 13.40% [2],[4],[6]
Investment owned at fair value $ 176,933 [3],[5] $ 163,989 [4],[6]
Investment, Identifier [Axis]: Series II | Investments in Partnership Investment Vehicle | Other Infrastructure Assets | United States | Social    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets [1],[3] 3.80%  
Investment owned at fair value [3] $ 54,083  
Investment, Identifier [Axis]: Series II | Investments in Partnership Investment Vehicle | Other Infrastructure Assets | United States | Transportation    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets 4.60% [1],[3] 5.40% [2],[4],[6]
Investment owned at fair value $ 65,630 [3] $ 66,482 [4],[6]
Investment, Identifier [Axis]: Series II | Investments in Partnership Investment Vehicle | Phoebe JV Energy, LLC | United States | Power & Utilities    
Schedule of Investments [Line Items]    
Investment owned number of shares 47,931 [3] 47,400 [4]
Fair Value as a Percentage of Net Assets 5.40% [1],[3] 6.20% [2],[4]
Investment owned at fair value $ 77,927 [3] $ 75,281 [4]
Investment, Identifier [Axis]: Total | Investments in Loans | Other Infrastructure Assets | Europe | Digital    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets 1.20% [1] 1.40% [2]
Investment owned at fair value $ 23,506 $ 24,122
Investment, Identifier [Axis]: Total | Investments in Loans | Other Infrastructure Assets | United States | Digital    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets 10.20% [1],[5] 9.50% [2],[6]
Investment owned at fair value $ 205,702 [5] $ 165,145 [6]
Investment, Identifier [Axis]: Total | Investments in Loans | Other Infrastructure Assets | United States | Power & Utilities    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets 5.00% [1],[5] 10.90% [2],[6]
Investment owned at fair value $ 100,889 [5] $ 189,711 [6]
Investment, Identifier [Axis]: Total | Investments in Loans | Other Infrastructure Assets | United States | Transportation    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets 3.60% [1] 2.80% [2]
Investment owned at fair value $ 73,196 $ 48,003
Investment, Identifier [Axis]: Total | Investments in Loans | Other Infrastructure Assets | Various | Digital    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets 1.60% [1] 0.20% [2]
Investment owned at fair value $ 32,142 $ 3,638
Investment, Identifier [Axis]: Total | Investments in Loans | Other Infrastructure Assets | Various | Transportation    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets 1.20% [1] 1.30% [2]
Investment owned at fair value $ 24,400 $ 22,936
Investment, Identifier [Axis]: Total | Investments in Partnership Investment Vehicle | AIC 3-Z Subsidiary, LLC | United States | Various    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets 8.20% [1],[3],[7] 8.40% [2],[4],[8]
Investment owned at fair value $ 164,360 [3],[7] $ 146,247 [4],[8]
Investment, Identifier [Axis]: Total | Investments in Partnership Investment Vehicle | AP Aegis Aggregator, SCSp | Europe | Digital    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets 7.10% [1],[3],[9] 7.70% [2],[4],[10]
Investment owned at fair value $ 142,882 [3],[9] $ 133,863 [4],[10]
Investment, Identifier [Axis]: Total | Investments in Partnership Investment Vehicle | AP Ballast, L.P. | United States | Transportation    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets 5.00% [1],[3],[11] 5.70% [2],[4],[12]
Investment owned at fair value $ 101,272 [3],[11] $ 98,754 [4],[12]
Investment, Identifier [Axis]: Total | Investments in Partnership Investment Vehicle | AP Hercules Aggregator SCSp | Norway | Transportation    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets [2],[4],[13]   5.20%
Investment owned at fair value [4],[13]   $ 90,181
Investment, Identifier [Axis]: Total | Investments in Partnership Investment Vehicle | AP Jaguar Holdings, LLC | United States | Power & Utilities    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets [1],[3],[14] 8.00%  
Investment owned at fair value [3],[14] $ 159,738  
Investment, Identifier [Axis]: Total | Investments in Partnership Investment Vehicle | AP Pegasus Holdings , SCSP | Canada | Power & Utilities    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets [1],[3],[15] 8.50%  
Investment owned at fair value [3],[15] $ 171,191  
Investment, Identifier [Axis]: Total | Investments in Partnership Investment Vehicle | Novus Holdings Parent, L.P. | United States | Transportation    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets 7.20% [1],[3] 7.40% [2],[4]
Investment owned at fair value $ 144,298 [3] $ 129,267 [4]
Investment, Identifier [Axis]: Total | Investments in Partnership Investment Vehicle | Other Infrastructure Assets | Canada | Social    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets 3.10% [1],[3] 3.40% [2],[4]
Investment owned at fair value $ 61,696 [3] $ 58,881 [4]
Investment, Identifier [Axis]: Total | Investments in Partnership Investment Vehicle | Other Infrastructure Assets | Norway | Transportation    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets [1],[3] 4.70%  
Investment owned at fair value [3] $ 93,862  
Investment, Identifier [Axis]: Total | Investments in Partnership Investment Vehicle | Other Infrastructure Assets | United States | Digital    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets 3.80% [1],[3] 1.70% [2],[4]
Investment owned at fair value $ 75,503 [3] $ 29,486 [4]
Investment, Identifier [Axis]: Total | Investments in Partnership Investment Vehicle | Other Infrastructure Assets | United States | Power & Utilities    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets 12.40% [1],[3],[5] 13.40% [2],[4],[6]
Investment owned at fair value $ 249,007 [3],[5] $ 233,379 [4],[6]
Investment, Identifier [Axis]: Total | Investments in Partnership Investment Vehicle | Other Infrastructure Assets | United States | Social    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets [1],[3] 3.80%  
Investment owned at fair value [3] $ 76,115  
Investment, Identifier [Axis]: Total | Investments in Partnership Investment Vehicle | Other Infrastructure Assets | United States | Transportation    
Schedule of Investments [Line Items]    
Fair Value as a Percentage of Net Assets 4.60% [1],[3] 5.50% [2],[4],[6]
Investment owned at fair value $ 92,366 [3] $ 94,614 [4],[6]
Investment, Identifier [Axis]: Total | Investments in Partnership Investment Vehicle | Phoebe JV Energy, LLC | United States | Power & Utilities    
Schedule of Investments [Line Items]    
Investment owned number of shares 67,457 [3] 67,457 [4]
Fair Value as a Percentage of Net Assets 5.50% [1],[3] 6.20% [2],[4]
Investment owned at fair value $ 109,672 [3] $ 107,136 [4]
[1] Fair Value as a percentage of Net Assets shown as a percentage of Net Assets of the respective Series. Numbers may not add due to rounding.
[2] Fair Value as a percentage of Net Assets shown as a percentage of Net Assets of the respective Series. Numbers may not sum due to rounding.
[3] Partnership investment vehicle includes investments in both limited partnerships and limited liability companies.
[4] Partnership investment vehicle includes investments in both limited partnerships and limited liability companies.
[5] There were no single investments included in this category that exceeded 5% of net assets.
[6] There were no single investments included in this category that exceeded 5% of net assets.
[7] Represents an investment in an affiliated entity of the Company.
[8] Represents an investment in an affiliated entity of the Company.
[9] Series I, Series II and the Company indirectly own 353,920,082, 868,791,607, and 1,222,711,689 units, respectively, in Aegis TopCo S.a.r.l., through AP Aegis Aggregator, SCSp an investment in the Digital industry in Europe. The fair value of Series I, Series II and the Company investment in units of Aegis TopCo S.a.r.l. were $41,289, $101,356 and $142,645, respectively, and the percentage of Net Asset Value of Series I, Series II, and the Company for each investment was 7.2%.
[10] Series I, Series II and the Company indirectly own 363,550,624, 859,161,065, and 1,222,711,689 units, respectively, in Aegis TopCo S.a.r.l., through AP Aegis Aggregator, SCSp an investment in the Digital industry in Europe. The fair value of Series I, Series II and the Company investment in units of Aegis TopCo S.a.r.l. were $39,726, $93,883 and $133,609, respectively, and the percentage of Net Asset Value of Series I, Series II, and the Company for each investment was 7.8%.
[11] Series I, Series II and the Company indirectly own 2,895, 7,105, and 10,000 units, respectively, in Watco Companies LLC, through AP Ballast, L.P. an investment in the Transportation industry in the United States. The fair value of Series I, Series II and the Company investment in units of Watco Companies LLC were $29,320, $71,974 and $101,294 respectively, and the percentage of Net Asset Value of Series I, Series II, and the Company for each investment was 5.0%.
[12] Series I, Series II and the Company indirectly own 2,973, 7,027, and 10,000 units, respectively, in Watco Companies LLC., through AP Ballast, L.P., an investment in the Transportation industry in the United States. The fair value of Series I, Series II and the Company investment in units of Watco Companies LLC were $29,361, $69,389 and $98,750, respectively, and the percentage of Net Asset Value of Series I, Series II, and the Company for each investment was 5.7%.
[13] Series I, Series II and the Company indirectly own 24,570,172, 58,065,463, and 82,635,635 units, respectively, in AP Hercules UK Ltd, through AP Hercules Aggregator SCSp, an investment in the Transportation industry in Norway. The fair value of Series I, Series II and the Company investment in units of AP Hercules UK Ltd were $26,843, $63,436 and $90,279, respectively, and the percentage of Net Asset Value of Series I, Series II, and the Company for each investment was 5.2%.
[14] Series I, Series II and the Company indirectly own 43,418,259, 106,581,741, and 150,000,000 units, respectively, in Eagle Creek Holdings, LLC, through AP Jaguar Holdings, LLC an investment in the Power & Utilities industry in the United States. The fair value of Series I, Series II and the Company investment in units of Eagle Creek Holdings, LLC were $46,232, $113,489 and $159,721, respectively, and the percentage of Net Asset Value of Series I, Series II, and the Company for each investment was 8.0%.
[15] Series I, Series II and the Company indirectly own 49,599,116, 121,754,312, and 171,353,428 units, respectively, in Pembina Gas Infrastructure Inc., through AP Pegasus Holdings, SCSP an investment in the Power & Utilities industry in Canada. The fair value of Series I, Series II and the Company investment in units of Pembina Gas Infrastructure Inc. were $49,552, $121,639 and $171,191, respectively, and the percentage of Net Asset Value of Series I, Series II, and the Company for each investment was 8.5%.