v3.26.3
Investments and Fair Value Measurement - Schedule of Investments Fair Value of an Investment using NAV (Details) - BXINFRA Aggregator (CYM) L.P. - Affiliated Investee Funds - USD ($)
$ in Thousands
Sep. 30, 2026
Dec. 31, 2025
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Unfunded Commitment $ 911,681 $ 355,000
Fair Value $ 2,077,385 $ 69,777