v3.26.1
Summary of Aggregate Notional Amount and Fair Value of Derivative Financial Instruments (Detail) - USD ($)
$ in Thousands
Mar. 31, 2026
Dec. 31, 2025
Derivatives, Fair Value [Line Items]    
Derivative Assets, Notional $ 2,243,967 $ 1,960,663
Derivative Liabilities, Notional 3,425,996 3,975,364
Derivative Assets, Fair Value 170,666 147,337
Derivative Liabilities, Fair Value 1,262,899 1,251,539
Freestanding Derivatives    
Derivatives, Fair Value [Line Items]    
Derivative Assets, Notional 871,339 880,390
Derivative Liabilities, Notional 865,519 880,390
Derivative Assets, Fair Value 14,028 12,780
Derivative Liabilities, Fair Value 14,007 12,780
Freestanding Derivatives | Blackstone    
Derivatives, Fair Value [Line Items]    
Derivative Assets, Notional 1,372,628 1,080,273
Derivative Liabilities, Notional 2,560,477 3,094,974
Derivative Assets, Fair Value 156,638 134,557
Derivative Liabilities, Fair Value 1,248,892 1,238,759
Freestanding Derivatives | Blackstone | Credit Default Swap    
Derivatives, Fair Value [Line Items]    
Derivative Liabilities, Notional 640 640
Derivative Liabilities, Fair Value 18 19
Freestanding Derivatives | Blackstone | Total Return Swaps    
Derivatives, Fair Value [Line Items]    
Derivative Assets, Notional 44,060 23,532
Derivative Assets, Fair Value 5,273 3,364
Freestanding Derivatives | Interest Rate Contracts | Blackstone    
Derivatives, Fair Value [Line Items]    
Derivative Assets, Notional 613,550 613,740
Derivative Liabilities, Notional 601,000 601,000
Derivative Assets, Fair Value 130,405 123,747
Derivative Liabilities, Fair Value 90,392 97,283
Freestanding Derivatives | Interest Rate Contracts | Consolidated Blackstone Funds    
Derivatives, Fair Value [Line Items]    
Derivative Assets, Notional 865,519 880,390
Derivative Liabilities, Notional 865,519 880,390
Derivative Assets, Fair Value 14,007 12,780
Derivative Liabilities, Fair Value 14,007 12,780
Freestanding Derivatives | Foreign Currency Contracts | Blackstone    
Derivatives, Fair Value [Line Items]    
Derivative Assets, Notional 715,018 443,001
Derivative Liabilities, Notional 473,997 1,030,702
Derivative Assets, Fair Value 20,960 7,446
Derivative Liabilities, Fair Value 9,227 17,310
Freestanding Derivatives | Foreign Currency Contracts | Consolidated Blackstone Funds    
Derivatives, Fair Value [Line Items]    
Derivative Assets, Notional 5,820  
Derivative Assets, Fair Value 21  
Freestanding Derivatives | Equity Options | Blackstone    
Derivatives, Fair Value [Line Items]    
Derivative Liabilities, Notional 1,484,840 1,462,632
Derivative Liabilities, Fair Value $ 1,149,255 $ 1,124,147