v3.25.4
Condensed Schedule of Investments (Parenthetical) - USD ($)
$ in Thousands
Dec. 31, 2025
Sep. 30, 2025
Dec. 31, 2024
Schedule of Investments [Line Items]      
Investment owned, cost $ 3,324,540   $ 0
Investments at Fair Value 3,555,635   0
BXINFRA Aggregator (CYM) L.P. [Member]      
Schedule of Investments [Line Items]      
Investment owned, cost $ 3,019,921   $ 0
BXINFRA Aggregator (CYM) L.P. [Member] | Odyssey Holdco L.L.C. and Odyssey Holdco II L.L.C [Member]      
Schedule of Investments [Line Items]      
Investment owned, balance, shares 719,237    
Investment net assets percentage 5.70%    
Equity securities, FV-NI $ 217,200    
BXINFRA Aggregator (CYM) L.P. [Member] | Energy [Member]      
Schedule of Investments [Line Items]      
Equity method investment, ownership percentage   29.10%  
BXINFRA Aggregator (CYM) L.P. [Member] | Transportation [Member]      
Schedule of Investments [Line Items]      
Equity method investment, ownership percentage   28.40%  
BXINFRA Aggregator (CYM) L.P. [Member] | Digital [Member]      
Schedule of Investments [Line Items]      
Equity method investment, ownership percentage   42.60%  
BXINFRA Aggregator (CYM) L.P. [Member] | Eucalyptus I HoldCo CYM LP [Member]      
Schedule of Investments [Line Items]      
Investment owned, balance, shares 165,605,569,717    
Investments at Fair Value $ 34,800    
Investment net assets percentage 0.90%    
BXINFRA Aggregator (CYM) L.P. [Member] | Mercury Co Invest LP [Member]      
Schedule of Investments [Line Items]      
Investment owned, balance, shares 131,326    
Investments at Fair Value $ 89,000    
Investment net assets percentage 2.30%    
BXINFRA Aggregator (CYM) L.P. [Member] | Poseidon Holdco I L.P. [Member]      
Schedule of Investments [Line Items]      
Investment owned, balance, shares 32,214    
Investments at Fair Value $ 37,100    
Investment net assets percentage 1.00%    
BXINFRA Aggregator (CYM) L.P. [Member] | Maximum [Member]      
Schedule of Investments [Line Items]      
Investment net assets percentage 5.00%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Cash and Cash Equivalents | Cash | Cash Held at Banks      
Schedule of Investments [Line Items]      
Investments at Fair Value $ 51,262    
Investment net assets percentage 1.30%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Cash and Cash Equivalents | Cash | Total Cash (Cost: $51,262)      
Schedule of Investments [Line Items]      
Investments at Fair Value $ 51,262    
Investment net assets percentage 1.30%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Cash and Cash Equivalents | Money Market Fund | Dreyfus Government Cash Management | Americas      
Schedule of Investments [Line Items]      
Investments at Fair Value $ 8,745    
Investment net assets percentage 0.20%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Cash and Cash Equivalents | Money Market Fund | Fidelity Investments Money Market Treasury | Americas      
Schedule of Investments [Line Items]      
Investments at Fair Value $ 4,737    
Investment net assets percentage 0.10%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Cash | Total Cash      
Schedule of Investments [Line Items]      
Cash $ 51,262    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Derivative at Fair Value | Derivative Assets at Fair Value | Foreign Currency Contracts      
Schedule of Investments [Line Items]      
Investments at Fair Value $ 143    
Investment net assets percentage 0.00%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Derivative at Fair Value | Derivative Assets at Fair Value | Total Derivative Assets at Fair Value      
Schedule of Investments [Line Items]      
Investments at Fair Value $ 143    
Investment net assets percentage 0.00%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Derivative at Fair Value | Derivative Liabilities at Fair Value | Foreign Currency Contracts      
Schedule of Investments [Line Items]      
Investments at Fair Value $ (265)    
Investment net assets percentage 0.00%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Derivative at Fair Value | Derivative Liabilities at Fair Value | Total Derivative Liabilities at Fair Value      
Schedule of Investments [Line Items]      
Investments at Fair Value $ (265)    
Investment net assets percentage 0.00%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Investments and Investments in Affiliated Investee Funds | Debt Investments | Debt Investments - Infrastructure | Consumer and Services | Other Investment(s) in Debt | Americas      
Schedule of Investments [Line Items]      
Investments at Fair Value [1] $ 9,738    
Investment net assets percentage [1] 0.30%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Investments and Investments in Affiliated Investee Funds | Debt Investments | Debt Investments - Infrastructure | Consumer and Services | Other Investment(s) in Debt | EMEA      
Schedule of Investments [Line Items]      
Investments at Fair Value [1] $ 29,670    
Investment net assets percentage [1] 0.80%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Investments and Investments in Affiliated Investee Funds | Debt Investments | Debt Investments - Infrastructure | Consumer and Services | Total Consumer and Services      
Schedule of Investments [Line Items]      
Investments at Fair Value [1] $ 39,408    
Investment net assets percentage [1] 1.00%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Investments and Investments in Affiliated Investee Funds | Debt Investments | Debt Investments - Infrastructure | Digital Infrastructure | Odyssey Holdco L.L.C. | Americas      
Schedule of Investments [Line Items]      
Investments at Fair Value [1] $ 25,001    
Investment net assets percentage [1] 0.70%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Investments and Investments in Affiliated Investee Funds | Debt Investments | Debt Investments - Infrastructure | Digital Infrastructure | Other Investment(s) in Debt | Americas      
Schedule of Investments [Line Items]      
Investments at Fair Value [1] $ 101,724    
Investment net assets percentage [1] 2.70%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Investments and Investments in Affiliated Investee Funds | Debt Investments | Debt Investments - Infrastructure | Digital Infrastructure | Total Digital Infrastructure      
Schedule of Investments [Line Items]      
Investments at Fair Value [1] $ 126,725    
Investment net assets percentage [1] 3.30%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Investments and Investments in Affiliated Investee Funds | Debt Investments | Debt Investments - Infrastructure | Energy Infrastructure Services | Total Energy Infrastructure      
Schedule of Investments [Line Items]      
Investments at Fair Value [1] $ 62,031    
Investment net assets percentage [1] 1.60%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Investments and Investments in Affiliated Investee Funds | Debt Investments | Debt Investments - Infrastructure | Energy Infrastructure | Other Investment(s) in Debt | Americas      
Schedule of Investments [Line Items]      
Investments at Fair Value [1] $ 62,031    
Investment net assets percentage [1] 1.60%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Investments and Investments in Affiliated Investee Funds | Debt Investments | Debt Investments - Infrastructure | Energy | Other Investment(s) in Debt | Americas      
Schedule of Investments [Line Items]      
Investments at Fair Value [1],[2] $ 197,485    
Investment net assets percentage [1],[2] 5.20%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Investments and Investments in Affiliated Investee Funds | Debt Investments | Debt Investments - Infrastructure | Energy | Total Energy      
Schedule of Investments [Line Items]      
Investments at Fair Value [1] $ 197,485    
Investment net assets percentage [1] 5.20%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Investments and Investments in Affiliated Investee Funds | Debt Investments | Debt Investments - Infrastructure | Industrials | Other Investment(s) in Debt | Americas      
Schedule of Investments [Line Items]      
Investments at Fair Value [1] $ 2,549    
Investment net assets percentage [1] 0.10%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Investments and Investments in Affiliated Investee Funds | Debt Investments | Debt Investments - Infrastructure | Industrials | Total Industrials      
Schedule of Investments [Line Items]      
Investments at Fair Value [1] $ 2,549    
Investment net assets percentage [1] 0.10%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Investments and Investments in Affiliated Investee Funds | Debt Investments | Debt Investments - Infrastructure | Infrastructure Services | Other Investment(s) in Debt | Americas      
Schedule of Investments [Line Items]      
Investments at Fair Value [1] $ 112,436    
Investment net assets percentage [1] 2.90%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Investments and Investments in Affiliated Investee Funds | Debt Investments | Debt Investments - Infrastructure | Infrastructure Services | Total Infrastructure Services      
Schedule of Investments [Line Items]      
Investments at Fair Value [1] $ 112,436    
Investment net assets percentage [1] 2.90%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Investments and Investments in Affiliated Investee Funds | Debt Investments | Debt Investments - Infrastructure | Technology, Media and Entertainment | Other Investment(s) in Debt | Americas      
Schedule of Investments [Line Items]      
Investments at Fair Value $ 20,012    
Investment net assets percentage [1] 0.50%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Investments and Investments in Affiliated Investee Funds | Debt Investments | Debt Investments - Infrastructure | Technology, Media and Entertainment |Total Technology, Media and Entertainment      
Schedule of Investments [Line Items]      
Investments at Fair Value [1] $ 20,012    
Investment net assets percentage [1] 0.50%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Investments and Investments in Affiliated Investee Funds | Debt Investments | Debt Investments - Infrastructure | Total Debt Investments - Infrastructure (Cost: Americas $570,634, EMEA $25,910)      
Schedule of Investments [Line Items]      
Investments at Fair Value [1] $ 698,531    
Investment net assets percentage [1] 18.30%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Investments and Investments in Affiliated Investee Funds | Debt Investments | Debt Investments - Infrastructure | Transportation Infrastructure | Other Investments in Debt | Americas      
Schedule of Investments [Line Items]      
Investments at Fair Value [1] $ 65,836    
Investment net assets percentage [1] 1.70%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Investments and Investments in Affiliated Investee Funds | Debt Investments | Debt Investments - Infrastructure | Transportation Infrastructure | Poseidon Seller 3 L.L.C. | Americas      
Schedule of Investments [Line Items]      
Investments at Fair Value [1] $ 72,049    
Investment net assets percentage [1] 1.90%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Investments and Investments in Affiliated Investee Funds | Debt Investments | Debt Investments - Infrastructure | Transportation Infrastructure | Total Transportation Infrastructure      
Schedule of Investments [Line Items]      
Investments at Fair Value [1] $ 137,885    
Investment net assets percentage [1] 3.60%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Investments and Investments in Affiliated Investee Funds | Debt Investments | Debt Investments - Liquid | Consumer and Services | Total Consumer and Services      
Schedule of Investments [Line Items]      
Investments at Fair Value [1],[3] $ 137,265    
Investment net assets percentage [1],[3] 3.60%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Investments and Investments in Affiliated Investee Funds | Debt Investments | Debt Investments - Liquid | Consumer and Services| Other Investment(s) in Debt | Americas      
Schedule of Investments [Line Items]      
Investments at Fair Value [1],[3] $ 128,251    
Investment net assets percentage [1],[3] 3.40%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Investments and Investments in Affiliated Investee Funds | Debt Investments | Debt Investments - Liquid | Consumer and Services| Other Investment(s) in Debt | EMEA      
Schedule of Investments [Line Items]      
Investments at Fair Value [1],[3] $ 9,014    
Investment net assets percentage [1],[3] 0.20%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Investments and Investments in Affiliated Investee Funds | Debt Investments | Debt Investments - Liquid | Digital Infrastructure | Other Investment(s) in Debt | Americas      
Schedule of Investments [Line Items]      
Investments at Fair Value [1],[3] $ 2,135    
Investment net assets percentage [1],[3] 0.10%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Investments and Investments in Affiliated Investee Funds | Debt Investments | Debt Investments - Liquid | Digital Infrastructure | Total Digital Infrastructure      
Schedule of Investments [Line Items]      
Investments at Fair Value [1],[3] $ 2,135    
Investment net assets percentage [1],[3] 0.10%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Investments and Investments in Affiliated Investee Funds | Debt Investments | Debt Investments - Liquid | Energy Infrastructure | Other Investment(s) in Debt | Americas      
Schedule of Investments [Line Items]      
Investments at Fair Value [1],[3] $ 6,408    
Investment net assets percentage [1],[3] 0.20%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Investments and Investments in Affiliated Investee Funds | Debt Investments | Debt Investments - Liquid | Energy Infrastructure | Total Infrastructure      
Schedule of Investments [Line Items]      
Investments at Fair Value [1],[3] $ 6,408    
Investment net assets percentage [1],[3] 0.20%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Investments and Investments in Affiliated Investee Funds | Debt Investments | Debt Investments - Liquid | Energy | Other Investment(s) in Debt | Americas      
Schedule of Investments [Line Items]      
Investments at Fair Value [1],[3] $ 4,283    
Investment net assets percentage [1],[3] 0.10%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Investments and Investments in Affiliated Investee Funds | Debt Investments | Debt Investments - Liquid | Energy | Total Energy      
Schedule of Investments [Line Items]      
Investments at Fair Value [1],[3] $ 4,283    
Investment net assets percentage [1],[3] 0.10%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Investments and Investments in Affiliated Investee Funds | Debt Investments | Debt Investments - Liquid | Healthcare | Other Investment(s) in Debt | Americas      
Schedule of Investments [Line Items]      
Investments at Fair Value [1],[3] $ 33,875    
Investment net assets percentage [1],[3] 0.90%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Investments and Investments in Affiliated Investee Funds | Debt Investments | Debt Investments - Liquid | Healthcare | Other Investment(s) in Debt | EMEA      
Schedule of Investments [Line Items]      
Investments at Fair Value [1],[3] $ 4,156    
Investment net assets percentage [1],[3] 0.10%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Investments and Investments in Affiliated Investee Funds | Debt Investments | Debt Investments - Liquid | Healthcare | Total Healthcare      
Schedule of Investments [Line Items]      
Investments at Fair Value [1],[3] $ 38,031    
Investment net assets percentage [1],[3] 1.00%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Investments and Investments in Affiliated Investee Funds | Debt Investments | Debt Investments - Liquid | Industrials | Other Investment(s) in Debt | Americas      
Schedule of Investments [Line Items]      
Investments at Fair Value [1],[3] $ 35,592    
Investment net assets percentage [1],[3] 0.90%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Investments and Investments in Affiliated Investee Funds | Debt Investments | Debt Investments - Liquid | Industrials | Total Industrials      
Schedule of Investments [Line Items]      
Investments at Fair Value [1],[3] $ 35,592    
Investment net assets percentage [1],[3] 0.90%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Investments and Investments in Affiliated Investee Funds | Debt Investments | Debt Investments - Liquid | Infrastructure Services | Other Investment(s) in Debt | APAC      
Schedule of Investments [Line Items]      
Investments at Fair Value [1],[3] $ 2,136    
Investment net assets percentage [1],[3] 0.10%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Investments and Investments in Affiliated Investee Funds | Debt Investments | Debt Investments - Liquid | Infrastructure Services | Other Investment(s) in Debt | Americas      
Schedule of Investments [Line Items]      
Investments at Fair Value [1],[3] $ 123,976    
Investment net assets percentage [1],[3] 3.20%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Investments and Investments in Affiliated Investee Funds | Debt Investments | Debt Investments - Liquid | Infrastructure Services | Other Investment(s) in Debt | EMEA      
Schedule of Investments [Line Items]      
Investments at Fair Value [1],[3] $ 5,149    
Investment net assets percentage [1],[3] 0.10%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Investments and Investments in Affiliated Investee Funds | Debt Investments | Debt Investments - Liquid | Infrastructure Services | Total Infrastructure Services      
Schedule of Investments [Line Items]      
Investments at Fair Value [1],[3] $ 131,261    
Investment net assets percentage [1],[3] 3.40%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Investments and Investments in Affiliated Investee Funds | Debt Investments | Debt Investments - Liquid | Real Estate | Other Investment(s) in Debt | Americas      
Schedule of Investments [Line Items]      
Investments at Fair Value [1],[3] $ 6,147    
Investment net assets percentage [1],[3] 0.20%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Investments and Investments in Affiliated Investee Funds | Debt Investments | Debt Investments - Liquid | Real Estate | Total Real Estate      
Schedule of Investments [Line Items]      
Investments at Fair Value [1],[3] $ 6,147    
Investment net assets percentage [1],[3] 0.20%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Investments and Investments in Affiliated Investee Funds | Debt Investments | Debt Investments - Liquid | Technology, Media and Entertainment | Other Investment(s) in Debt | APAC      
Schedule of Investments [Line Items]      
Investments at Fair Value [1],[3] $ 3,015    
Investment net assets percentage [1],[3] 0.10%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Investments and Investments in Affiliated Investee Funds | Debt Investments | Debt Investments - Liquid | Technology, Media and Entertainment | Other Investment(s) in Debt | Americas      
Schedule of Investments [Line Items]      
Investments at Fair Value [1],[3] $ 91,082    
Investment net assets percentage [1],[3] 2.40%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Investments and Investments in Affiliated Investee Funds | Debt Investments | Debt Investments - Liquid | Technology, Media and Entertainment | Other Investment(s) in Debt | EMEA      
Schedule of Investments [Line Items]      
Investments at Fair Value [1],[3] $ 2,010    
Investment net assets percentage [1],[3] 0.10%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Investments and Investments in Affiliated Investee Funds | Debt Investments | Debt Investments - Liquid | Technology, Media and Entertainment | Total Technology, Media and Entertainment      
Schedule of Investments [Line Items]      
Investments at Fair Value [1],[3] $ 96,107    
Investment net assets percentage [1],[3] 2.50%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Investments and Investments in Affiliated Investee Funds | Debt Investments | Debt Investments - Liquid | Total Debt Investments (Cost: Americas $1,101,545, EMEA $46,243, APAC $5,145)      
Schedule of Investments [Line Items]      
Investments at Fair Value [1],[3] $ 1,166,894    
Investment net assets percentage [1],[3] 30.60%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Investments and Investments in Affiliated Investee Funds | Debt Investments | Debt Investments - Liquid | Total Debt Investments - Liquid (Cost: Americas $443,224, EMEA $20,329, APAC $5,145)      
Schedule of Investments [Line Items]      
Investments at Fair Value [1],[3] $ 468,363    
Investment net assets percentage [1],[3] 12.30%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Investments and Investments in Affiliated Investee Funds | Debt Investments | Debt Investments - Liquid | Total Investments and Investments in Affiliated Investee Funds (Cost: $3,822,467)      
Schedule of Investments [Line Items]      
Investments at Fair Value [1],[3] $ 4,160,071    
Investment net assets percentage 109.00%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Investments and Investments in Affiliated Investee Funds | Debt Investments | Debt Investments - Liquid | Transportation Infrastructure | Other Investment(s) in Debt | Americas      
Schedule of Investments [Line Items]      
Investments at Fair Value [1],[3] $ 11,134    
Investment net assets percentage [1],[3] 0.30%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Investments and Investments in Affiliated Investee Funds | Debt Investments | Debt Investments - Liquid | Transportation Infrastructure | Total Transportation      
Schedule of Investments [Line Items]      
Investments at Fair Value [1],[3] $ 11,134    
Investment net assets percentage [1],[3] 0.30%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Investments and Investments in Affiliated Investee Funds | Equity Investments | Digital Infrastructure | Eucalyptus I HoldCo (CYM) L.P. (1,637,829,051,635 Shares) | APAC      
Schedule of Investments [Line Items]      
Investments at Fair Value [4],[5] $ 346,583    
Investment net assets percentage [4],[5] 9.10%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Investments and Investments in Affiliated Investee Funds | Equity Investments | Digital Infrastructure | Odyssey Holdco L.L.C. (811,288 Shares) | Americas      
Schedule of Investments [Line Items]      
Investments at Fair Value [5],[6] $ 244,587    
Investment net assets percentage [5],[6] 6.40%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Investments and Investments in Affiliated Investee Funds | Equity Investments | Digital Infrastructure | Other Investment(s) in Equity | Americas      
Schedule of Investments [Line Items]      
Investments at Fair Value [5] $ 21,259    
Investment net assets percentage [5] 0.60%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Investments and Investments in Affiliated Investee Funds | Equity Investments | Digital Infrastructure | Total Digital Infrastructure      
Schedule of Investments [Line Items]      
Investments at Fair Value [5] $ 612,429    
Investment net assets percentage [5] 16.00%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Investments and Investments in Affiliated Investee Funds | Equity Investments | Energy Infrastructure | Other Investment(s) in Equity | Americas      
Schedule of Investments [Line Items]      
Investments at Fair Value [5] $ 123,060    
Investment net assets percentage [5] 3.20%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Investments and Investments in Affiliated Investee Funds | Equity Investments | Energy Infrastructure | Total Energy Infrastructure      
Schedule of Investments [Line Items]      
Investments at Fair Value [5] $ 123,060    
Investment net assets percentage [5] 3.20%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Investments and Investments in Affiliated Investee Funds | Equity Investments | Transportation Infrastructure | Hieroglyphs L.P. (220 Shares) | EMEA      
Schedule of Investments [Line Items]      
Investments at Fair Value [5] $ 222,041    
Investment net assets percentage [5] 5.80%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Investments and Investments in Affiliated Investee Funds | Equity Investments | Transportation Infrastructure | Mercury Co-Invest L.P. (783,265 Shares) | Americas      
Schedule of Investments [Line Items]      
Investments at Fair Value [5],[7] $ 534,915    
Investment net assets percentage [5],[7] 14.00%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Investments and Investments in Affiliated Investee Funds | Equity Investments | Transportation Infrastructure | Other Investment(s) in Equity | EMEA      
Schedule of Investments [Line Items]      
Investments at Fair Value [5] $ 76    
Investment net assets percentage [5] 0.00%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Investments and Investments in Affiliated Investee Funds | Equity Investments | Transportation Infrastructure | Poseidon Holdco I L.P. (500,000 Shares) | Americas      
Schedule of Investments [Line Items]      
Investments at Fair Value [5],[8] $ 580,177    
Investment net assets percentage [5],[8] 15.20%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Investments and Investments in Affiliated Investee Funds | Equity Investments | Transportation Infrastructure | Total Transportation Infrastructure      
Schedule of Investments [Line Items]      
Investments at Fair Value [5] $ 1,337,209    
Investment net assets percentage [5] 35.00%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Investments and Investments in Affiliated Investee Funds | Equity Investments | Various | Other Investment(s) in Affiliated Investee Funds | Various      
Schedule of Investments [Line Items]      
Investments at Fair Value [5],[9] $ 130,251    
Investment net assets percentage [5],[9] 3.40%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Investments and Investments in Affiliated Investee Funds | Equity Investments | Various | Total Various      
Schedule of Investments [Line Items]      
Investments at Fair Value [5],[9] $ 920,479    
Investment net assets percentage [5],[9] 24.10%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Investments and Investments in Affiliated Investee Funds | Equity Investments | Various |Infrastructure Investments L.P. (640,423 Shares) | Various      
Schedule of Investments [Line Items]      
Investments at Fair Value [5],[9],[10] $ 790,228    
Investment net assets percentage [5],[9],[10] 20.70%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Investments and Investments in Affiliated Investee Funds | Total Equity Investments (Cost: Americas $1,349,855, EMEA $219,658, APAC $297,475, Various $802,546)      
Schedule of Investments [Line Items]      
Investments at Fair Value [5] $ 2,993,177    
Investment net assets percentage [5] 78.40%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Total Cash and Cash Equivalents (Cost $64,744)      
Schedule of Investments [Line Items]      
Investment owned, cost $ 64,744    
Investments at Fair Value $ 64,744    
Investment net assets percentage 1.70%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Total Debt Investments - Liquids | APAC      
Schedule of Investments [Line Items]      
Investment owned, cost $ 5,145    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Total Debt Investments - Liquids | Americas      
Schedule of Investments [Line Items]      
Investment owned, cost 443,224    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Total Debt Investments - Liquids | EMEA      
Schedule of Investments [Line Items]      
Investment owned, cost 20,329    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Total Debt Investments | APAC      
Schedule of Investments [Line Items]      
Investment owned, cost 5,145    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Total Debt Investments | Americas      
Schedule of Investments [Line Items]      
Investment owned, cost 1,101,545    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Total Debt Investments | EMEA      
Schedule of Investments [Line Items]      
Investment owned, cost 46,243    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Total Derivatives      
Schedule of Investments [Line Items]      
Investments at Fair Value $ (122)    
Investment net assets percentage 0.00%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Total Equity Investments | APAC      
Schedule of Investments [Line Items]      
Investment owned, cost $ 297,475    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Total Equity Investments | Americas      
Schedule of Investments [Line Items]      
Investment owned, cost 1,349,855    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Total Equity Investments | EMEA      
Schedule of Investments [Line Items]      
Investment owned, cost 219,658    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Total Equity Investments | Various      
Schedule of Investments [Line Items]      
Investment owned, cost 802,546    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Total Investments and Investments in Affiliated Investee Funds (Cost $3,822,467)      
Schedule of Investments [Line Items]      
Investment owned, cost 3,822,467    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Total Investments, Investments in Affiliated Investee Funds, Cash and Cash Equivalents and Derivative Instruments (Cost $3,887,211)      
Schedule of Investments [Line Items]      
Investment owned, cost 3,887,211    
Investments at Fair Value $ 4,224,693    
Investment net assets percentage 110.70%    
Investment, Identifier [Axis]: BXINFRA Aggregator (CYM) L.P. | Total Money Market Fund (Cost: $13,482 Americas)      
Schedule of Investments [Line Items]      
Investment owned, cost $ 13,482    
Investments at Fair Value $ 13,482    
Investment net assets percentage 0.40%    
Investment, Identifier [Axis]: Eucalyptus I HoldCo (CYM) L.P. (1,637,829,051,635 Shares)      
Schedule of Investments [Line Items]      
Investment owned, balance, shares 1,637,829,051,635    
Investment, Identifier [Axis]: Hieroglyphs L.P. (220 Shares)      
Schedule of Investments [Line Items]      
Investment owned, balance, shares 220    
Investment, Identifier [Axis]: Infrastructure Investments L.P. (640,423 Shares)      
Schedule of Investments [Line Items]      
Investment owned, balance, shares 640,423    
Investment, Identifier [Axis]: Investments | BXINFRA Aggregator (CYM) L.P. (129,060,376 Units)      
Schedule of Investments [Line Items]      
Investment owned, balance, shares 129,060,376    
Investments at Fair Value [11] $ 3,555,635    
Investment net assets percentage [11] 102.00%    
Investment, Identifier [Axis]: Investments | Total Investments (Cost $3,324,540)      
Schedule of Investments [Line Items]      
Investments at Fair Value $ 3,555,635    
Investment net assets percentage 102.00%    
Investment, Identifier [Axis]: Mercury Co-Invest L.P. (783,265 Shares)      
Schedule of Investments [Line Items]      
Investment owned, balance, shares 783,265    
Investment, Identifier [Axis]: Odyssey Holdco L.L.C. (811,288 Shares)      
Schedule of Investments [Line Items]      
Investment owned, balance, shares 811,288    
Investment, Identifier [Axis]: Poseidon Holdco I L.P. (500,000 Shares)      
Schedule of Investments [Line Items]      
Investment owned, balance, shares 500,000    
Investment, Identifier [Axis]: Total Debt Investments - Infrastructure | Americas      
Schedule of Investments [Line Items]      
Investment owned, cost $ 658,321    
Investment, Identifier [Axis]: Total Debt Investments - Infrastructure | EMEA      
Schedule of Investments [Line Items]      
Investment owned, cost 25,914    
Investment, Identifier [Axis]: nvestments | Total Investments (Cost $3,324,540)      
Schedule of Investments [Line Items]      
Investment owned, cost $ 3,324,540    
[1] Includes different forms of interests that represent a creditor relationship with an investee, including but not limited to (1) bank loans, (2) interests in CLOs and (3) direct lending debt investments.
[2] There were no single investments included in this category that exceeded 5% of net assets of BXINFRA Aggregator (CYM) L.P., Blackstone Infrastructure Strategies L.P., Blackstone Infrastructure Strategies (TE) L.P. or a Parallel Fund (as defined below).
[3] Investments are generally liquid in nature, are intended to be held for short durations and may be used to generate income, facilitate capital deployment or provide a potential source of liquidity. Industries may be diversified outside of infrastructure industries.
[4] BXINFRA through its interest in Infrastructure Investments L.P. also holds interests in Eucalyptus I HoldCo (CYM) L.P. with BXINFRA’s proportionate fair value representing $34.8 million, or 0.9% of BXINFRA Net Assets and BXINFRA indirectly owns 165,605,569,717 shares in the investee.
[5] Equity Investments are generally considered equity interests, which includes different forms of interests and rights and obligations that represent ownership in an entity or the right to acquire or dispose of ownership in an entity, including but not limited to (1) common equity, (2) preferred equity, (3) limited partner interest (4) warrants and (5) other equity-linked securities.
[6] BXINFRA through its interest in Infrastructure Investments L.P. holds an interest in Odyssey Holdco L.L.C. and Odyssey Holdco II L.L.C. BXINFRA’s proportionate fair value in the equity investment is $217.2 million, representing 5.7% of BXINFRA Net Assets and BXINFRA indirectly owns 719,237 shares in the investee.
[7] BXINFRA through its interest in Infrastructure Investments L.P. holds an interest in an investee also held by Mercury Co-Invest L.P. with BXINFRA’s proportionate fair value representing $89.0 million, or 2.3% of BXINFRA Net Assets and BXINFRA indirectly owns 131,326 shares in the investee.
[8] BXINFRA through its interest in Infrastructure Investments L.P. holds an interest in an investee also held by Poseidon Holdco I L.P. with BXINFRA’s proportionate fair value representing $37.1 million, or 1.0% of BXINFRA Net Assets and BXINFRA indirectly owns 32,214 shares in the investee.
[9] Fund investments are diversified and are not categorized to one industry.
[10] BXINFRA is indirectly exposed to portfolio companies owned by Infrastructure Investments L.P. The investments of Infrastructure Investments L.P. are within the following industries: Energy, Transportation and Digital which are 29.1%, 28.4% and 42.6% of the Infrastructure Investments L.P. vehicle’s investments, respectively.
[11] Refer to Note 3. “Investment in the Aggregator” for details on BXINFRA U.S.’s proportional share of investments through investees.