v3.26.1
Fair Value Measurement and Disclosures - Schedule of the Valuation of the Company's Investments in the Fair Value Hierarchy Levels (Detail) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Investments at fair value (cost at June 30, 2026 of $554,560; $1,359,133; $1,913,693; and at December 31, 2025 of $433,853; $1,019,236; $1,453,089; respectively) $ 2,101,797 $ 1,575,363
Total Derivative Assets [1] 4,412 1,060
Total Derivative Liabilities (559) (1,189) [1]
Total 2,279,165 1,773,752
Foreign Currency Forward Contracts [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total Derivative Assets 4,412 1,060
Total Derivative Liabilities (559) (1,189)
Partnership Investment Vehicle [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Investments at fair value (cost at June 30, 2026 of $554,560; $1,359,133; $1,913,693; and at December 31, 2025 of $433,853; $1,019,236; $1,453,089; respectively) 1,641,962 [2] 1,121,808 [3]
Cash and Cash Equivalents and Foreign Currencies at Fair Value [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash and cash equivalents and foreign currencies at fair value 173,515 198,518
Loan [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Investments at fair value (cost at June 30, 2026 of $554,560; $1,359,133; $1,913,693; and at December 31, 2025 of $433,853; $1,019,236; $1,453,089; respectively) 459,835 453,555
Level I [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total 173,515 198,518
Level I [Member] | Cash and Cash Equivalents and Foreign Currencies at Fair Value [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash and cash equivalents and foreign currencies at fair value 173,515 198,518
Level II [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total Derivative Assets [1] 4,412 1,060
Total Derivative Liabilities [1] (559) (1,189)
Total 3,853 (129)
Level II [Member] | Foreign Currency Forward Contracts [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total Derivative Assets 4,412 1,060
Total Derivative Liabilities (559) (1,189)
Level III [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Investments at fair value (cost at June 30, 2026 of $554,560; $1,359,133; $1,913,693; and at December 31, 2025 of $433,853; $1,019,236; $1,453,089; respectively) 1,347,101 912,401
Total 1,347,101 912,401
Level III [Member] | Partnership Investment Vehicle [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Investments at fair value (cost at June 30, 2026 of $554,560; $1,359,133; $1,913,693; and at December 31, 2025 of $433,853; $1,019,236; $1,453,089; respectively) 887,266 458,846
Level III [Member] | Loan [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Investments at fair value (cost at June 30, 2026 of $554,560; $1,359,133; $1,913,693; and at December 31, 2025 of $433,853; $1,019,236; $1,453,089; respectively) 459,835 453,555
Investments Measured at NAV [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Investments at fair value (cost at June 30, 2026 of $554,560; $1,359,133; $1,913,693; and at December 31, 2025 of $433,853; $1,019,236; $1,453,089; respectively) 754,696 [4],[5],[6] 662,962 [7],[8]
Total 754,696 [4],[5],[6] 662,962 [7],[8]
Investments Measured at NAV [Member] | Partnership Investment Vehicle [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Investments at fair value (cost at June 30, 2026 of $554,560; $1,359,133; $1,913,693; and at December 31, 2025 of $433,853; $1,019,236; $1,453,089; respectively) 754,696 [4],[5],[6] 662,962 [7],[8]
Apollo Infrastructure Company LLC Series One [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Investments at fair value (cost at June 30, 2026 of $554,560; $1,359,133; $1,913,693; and at December 31, 2025 of $433,853; $1,019,236; $1,453,089; respectively) 608,376 468,403
Total Derivative Assets [1] 1,284 313
Total Derivative Liabilities [1] (168) (332)
Total 658,901 526,830
Apollo Infrastructure Company LLC Series One [Member] | Foreign Currency Forward Contracts [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total Derivative Assets 1,284 313
Total Derivative Liabilities (168) (332)
Apollo Infrastructure Company LLC Series One [Member] | Partnership Investment Vehicle [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Investments at fair value (cost at June 30, 2026 of $554,560; $1,359,133; $1,913,693; and at December 31, 2025 of $433,853; $1,019,236; $1,453,089; respectively) 475,273 333,548
Apollo Infrastructure Company LLC Series One [Member] | Cash and Cash Equivalents and Foreign Currencies at Fair Value [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash and cash equivalents and foreign currencies at fair value 49,409 58,446
Apollo Infrastructure Company LLC Series One [Member] | Loan [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Investments at fair value (cost at June 30, 2026 of $554,560; $1,359,133; $1,913,693; and at December 31, 2025 of $433,853; $1,019,236; $1,453,089; respectively) 133,103 134,855 [9]
Apollo Infrastructure Company LLC Series One [Member] | Level I [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total 49,409 58,446
Apollo Infrastructure Company LLC Series One [Member] | Level I [Member] | Cash and Cash Equivalents and Foreign Currencies at Fair Value [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash and cash equivalents and foreign currencies at fair value 49,409 58,446
Apollo Infrastructure Company LLC Series One [Member] | Level II [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total Derivative Assets [1] 1,284 313
Total Derivative Liabilities [1] (168) (332)
Total 1,116 (19)
Apollo Infrastructure Company LLC Series One [Member] | Level II [Member] | Foreign Currency Forward Contracts [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total Derivative Assets 1,284 313
Total Derivative Liabilities (168) (332)
Apollo Infrastructure Company LLC Series One [Member] | Level III [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Investments at fair value (cost at June 30, 2026 of $554,560; $1,359,133; $1,913,693; and at December 31, 2025 of $433,853; $1,019,236; $1,453,089; respectively) 389,926 271,283
Total 389,926 271,283
Apollo Infrastructure Company LLC Series One [Member] | Level III [Member] | Partnership Investment Vehicle [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Investments at fair value (cost at June 30, 2026 of $554,560; $1,359,133; $1,913,693; and at December 31, 2025 of $433,853; $1,019,236; $1,453,089; respectively) 256,823 136,428
Apollo Infrastructure Company LLC Series One [Member] | Level III [Member] | Loan [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Investments at fair value (cost at June 30, 2026 of $554,560; $1,359,133; $1,913,693; and at December 31, 2025 of $433,853; $1,019,236; $1,453,089; respectively) 133,103 134,855 [9]
Apollo Infrastructure Company LLC Series One [Member] | Investments Measured at NAV [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Investments at fair value (cost at June 30, 2026 of $554,560; $1,359,133; $1,913,693; and at December 31, 2025 of $433,853; $1,019,236; $1,453,089; respectively) 218,450 [4],[5],[6] 197,120 [7],[8]
Total 218,450 [4],[5],[6] 197,120 [7],[8]
Apollo Infrastructure Company LLC Series One [Member] | Investments Measured at NAV [Member] | Partnership Investment Vehicle [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Investments at fair value (cost at June 30, 2026 of $554,560; $1,359,133; $1,913,693; and at December 31, 2025 of $433,853; $1,019,236; $1,453,089; respectively) 218,450 [4],[5],[6] 197,120 [7],[8]
Apollo Infrastructure Company LLC Series Two [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Investments at fair value (cost at June 30, 2026 of $554,560; $1,359,133; $1,913,693; and at December 31, 2025 of $433,853; $1,019,236; $1,453,089; respectively) 1,493,421 1,106,960
Total Derivative Assets [1] 3,128 747
Total Derivative Liabilities [1] (391) (857)
Total 1,620,264 1,246,922
Apollo Infrastructure Company LLC Series Two [Member] | Foreign Currency Forward Contracts [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total Derivative Assets 3,128 747
Total Derivative Liabilities (391) (857)
Apollo Infrastructure Company LLC Series Two [Member] | Partnership Investment Vehicle [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Investments at fair value (cost at June 30, 2026 of $554,560; $1,359,133; $1,913,693; and at December 31, 2025 of $433,853; $1,019,236; $1,453,089; respectively) 1,166,689 788,260
Apollo Infrastructure Company LLC Series Two [Member] | Cash and Cash Equivalents and Foreign Currencies at Fair Value [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash and cash equivalents and foreign currencies at fair value 124,106 140,072
Apollo Infrastructure Company LLC Series Two [Member] | Loan [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Investments at fair value (cost at June 30, 2026 of $554,560; $1,359,133; $1,913,693; and at December 31, 2025 of $433,853; $1,019,236; $1,453,089; respectively) 326,732 318,700
Apollo Infrastructure Company LLC Series Two [Member] | Level I [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total 124,106 140,072
Apollo Infrastructure Company LLC Series Two [Member] | Level I [Member] | Cash and Cash Equivalents and Foreign Currencies at Fair Value [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash and cash equivalents and foreign currencies at fair value 124,106 140,072
Apollo Infrastructure Company LLC Series Two [Member] | Level II [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total Derivative Assets [1] 3,128 747
Total Derivative Liabilities [1] (391) (857)
Total 2,737 (110)
Apollo Infrastructure Company LLC Series Two [Member] | Level II [Member] | Foreign Currency Forward Contracts [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total Derivative Assets 3,128 747
Total Derivative Liabilities (391) (857)
Apollo Infrastructure Company LLC Series Two [Member] | Level III [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Investments at fair value (cost at June 30, 2026 of $554,560; $1,359,133; $1,913,693; and at December 31, 2025 of $433,853; $1,019,236; $1,453,089; respectively) 957,175 641,118
Total 957,175 641,118
Apollo Infrastructure Company LLC Series Two [Member] | Level III [Member] | Partnership Investment Vehicle [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Investments at fair value (cost at June 30, 2026 of $554,560; $1,359,133; $1,913,693; and at December 31, 2025 of $433,853; $1,019,236; $1,453,089; respectively) 630,443 322,418
Apollo Infrastructure Company LLC Series Two [Member] | Level III [Member] | Loan [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Investments at fair value (cost at June 30, 2026 of $554,560; $1,359,133; $1,913,693; and at December 31, 2025 of $433,853; $1,019,236; $1,453,089; respectively) 326,732 318,700
Apollo Infrastructure Company LLC Series Two [Member] | Investments Measured at NAV [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Investments at fair value (cost at June 30, 2026 of $554,560; $1,359,133; $1,913,693; and at December 31, 2025 of $433,853; $1,019,236; $1,453,089; respectively) 536,246 [4],[5],[6] 465,842 [7],[8]
Total 536,246 [4],[5],[6] 465,842 [7],[8]
Apollo Infrastructure Company LLC Series Two [Member] | Investments Measured at NAV [Member] | Partnership Investment Vehicle [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Investments at fair value (cost at June 30, 2026 of $554,560; $1,359,133; $1,913,693; and at December 31, 2025 of $433,853; $1,019,236; $1,453,089; respectively) $ 536,246 [4],[5],[6] $ 465,842 [7],[8]
[1] Refer to Note 4. Derivative Instruments for additional information of derivative assets and derivative liabilities.
[2] Partnership investment vehicle includes investments in both limited partnerships and limited liability companies.
[3] Partnership investment vehicle includes investments in both limited partnerships and limited liability companies.
[4] As of June 30, 2026, Series I, Series II and the Company had unfunded commitments of $18,777, $46,092, and $64,869, respectively, related to investments measured at NAV.
[5] Included within certain investments measured at NAV were Level III investments. Series I, Series II, and the Company Level III amounts of these investments were $193,995, $476,213, and $670,208, respectively.
[6] The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the amounts presented in the consolidated statement of assets and liabilities.
[7] As of December 31, 2025, Series I, Series II and the Company had unfunded commitments of $25,414, $60,058, and $85,472, respectively, related to investments measured at NAV
[8] Included within certain investments measured at NAV were Level III investments. Series I, Series II and the Company Level III amounts of these investments were $171,384, $405,023, and $576,407, respectively
[9] The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the amounts presented in the consolidated statement of assets and liabilities.