v3.25.4
Condensed Statement of Changes in Net Assets - USD ($)
$ in Thousands
 5 Months Ended 6 Months Ended 12 Months Ended
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2025
Investment Company, Change in Net Assets [Line Items]      
Beginning balance   $ 0 $ 100
Proceeds from Units Issued   100 3,298,910
Net Investment Income   0 69,089
Distributions Reinvested     31,624
Distributions     (70,573)
Net Change in Unrealized Gain (Loss) on Investment in the Aggregator   0 231,095
Servicing Fees     (74,182)
Conversion of Units Between Classes     0
Redemption of Units, Net of Early Redemption Deduction     (815)
Ending balance $ 100 100 3,485,248
BXINFRA Aggregator (CYM) L.P. [Member]      
Investment Company, Change in Net Assets [Line Items]      
Beginning balance 0   0
Proceeds from Units Issued     3,538,760
Net Investment Income 0   4,012
Distributions Reinvested     32,253
Distributions     (76,585)
Net Realized Gain on Investments, Derivative Instruments and Translation of Assets and Liabilities in Foreign Currencies     (17,090)
Net Change in Unrealized Gain (Loss) on Investments 0   331,270
Net Change in Unrealized Gain (Loss) on Derivative Instruments 0   (123)
Net Change in Unrealized Gain (Loss) on Translation of Assets and Liabilities in Foreign Currencies 0   6,392
Redemption of Units, Net of Early Redemption Deduction     (1,851)
Ending balance 0 0 3,817,038
Class I Units [Member]      
Investment Company, Change in Net Assets [Line Items]      
Beginning balance   0 100
Proceeds from Units Issued   100 2,124,317
Net Investment Income     43,649
Distributions Reinvested     17,771
Distributions     (44,495)
Net Change in Unrealized Gain (Loss) on Investment in the Aggregator     146,440
Servicing Fees     0
Conversion of Units Between Classes     2,413
Redemption of Units, Net of Early Redemption Deduction     (492)
Ending balance 100 100 2,289,703
Class S Units [Member]      
Investment Company, Change in Net Assets [Line Items]      
Beginning balance   0 0
Proceeds from Units Issued   0 1,074,916
Net Investment Income     23,279
Distributions Reinvested     12,599
Distributions     (23,871)
Net Change in Unrealized Gain (Loss) on Investment in the Aggregator     77,423
Servicing Fees     (71,989)
Conversion of Units Between Classes     (12,029)
Redemption of Units, Net of Early Redemption Deduction     (325)
Ending balance 0 0 1,080,003
Class D Units [Member]      
Investment Company, Change in Net Assets [Line Items]      
Beginning balance   0 0
Proceeds from Units Issued   0 99,427
Net Investment Income     2,161
Distributions Reinvested     1,254
Distributions     (2,207)
Net Change in Unrealized Gain (Loss) on Investment in the Aggregator     7,232
Servicing Fees     (2,193)
Conversion of Units Between Classes     9,616
Redemption of Units, Net of Early Redemption Deduction     2
Ending balance 0 0 115,292
General Partner Interest [Member]      
Investment Company, Change in Net Assets [Line Items]      
Beginning balance   0 0
Proceeds from Units Issued   0 250 [1]
Net Investment Income     0
Distributions Reinvested     0
Distributions     0
Net Change in Unrealized Gain (Loss) on Investment in the Aggregator     0
Servicing Fees     0
Conversion of Units Between Classes     0
Redemption of Units, Net of Early Redemption Deduction     0
Ending balance 0 0 250
Class A Units [Member] | BXINFRA Aggregator (CYM) L.P. [Member]      
Investment Company, Change in Net Assets [Line Items]      
Beginning balance 0   0
Proceeds from Units Issued     3,538,760
Net Investment Income     4,012
Distributions Reinvested     32,253
Distributions     (76,585)
Net Realized Gain on Investments, Derivative Instruments and Translation of Assets and Liabilities in Foreign Currencies     (17,090)
Net Change in Unrealized Gain (Loss) on Investments     331,270
Net Change in Unrealized Gain (Loss) on Derivative Instruments     (123)
Net Change in Unrealized Gain (Loss) on Translation of Assets and Liabilities in Foreign Currencies     6,392
Redemption of Units, Net of Early Redemption Deduction     (1,851)
Ending balance 0 0 3,817,038
Class B Units [Member] | BXINFRA Aggregator (CYM) L.P. [Member]      
Investment Company, Change in Net Assets [Line Items]      
Beginning balance 0   0
Proceeds from Units Issued     0
Net Investment Income     0
Distributions Reinvested     0
Distributions     0
Net Realized Gain on Investments, Derivative Instruments and Translation of Assets and Liabilities in Foreign Currencies     0
Net Change in Unrealized Gain (Loss) on Investments     0
Net Change in Unrealized Gain (Loss) on Derivative Instruments     0
Net Change in Unrealized Gain (Loss) on Translation of Assets and Liabilities in Foreign Currencies     0
Redemption of Units, Net of Early Redemption Deduction     0
Ending balance $ 0 $ 0 $ 0
[1] The General Partner did not receive any Units for its contribution to BXINFRA U.S.