v3.26.1
Financial Assets and Liabilities at Fair Value (Detail) - USD ($)
$ in Thousands
Mar. 31, 2026
Dec. 31, 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Accounts Receivable - Loans and Receivables $ 425,981 $ 205,158
Assets 6,157,534 5,093,618
Corporate Treasury Commitments $ 2,038 $ 181
Derivative Asset, Statement of Financial Position [Extensible Enumeration] Other Assets Other Assets
Freestanding Derivatives    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Other Assets - Freestanding Derivatives $ 170,666 $ 147,337
Derivatives liabilities 113,645 127,392
Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets 4,977,009 4,712,057
Liabilities 1,151,709 1,124,744
Fair Value, Measurements, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash and Cash Equivalents 57,280 182,131
Total Investments 12,695,649 12,276,243
Accounts Receivable - Loans and Receivables 425,981 205,158
Assets 13,335,548 12,798,089
Contingent Consideration 416 416
Securities Sold, Not Yet Purchased 1,967 1,978
Total Accounts Payable, Accrued Expenses and Other Liabilities 1,267,320 1,254,114
Liabilities 1,267,320 1,254,114
Fair Value, Measurements, Recurring | Corporate Treasury Commitments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Corporate Treasury Commitments 2,038 181
Fair Value, Measurements, Recurring | Freestanding Derivatives    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivatives liabilities 1,248,892 1,238,759
Fair Value, Measurements, Recurring | Consolidated Blackstone Funds - Freestanding Derivatives    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivatives liabilities 14,007 12,780
Fair Value, Measurements, Recurring | Other Investments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total Investments 7,338,741 6,735,707
Fair Value, Measurements, Recurring | Net Asset Value    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total Investments [1] 1,097,527 896,227
Assets [1] 1,097,527 896,227
Fair Value, Measurements, Recurring | Net Asset Value | Other Investments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total Investments [1] 15,741 15,808
Fair Value, Measurements, Recurring | Consolidated Blackstone Funds    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total Investments 5,189,519 5,180,879
Other Assets - Freestanding Derivatives 156,638 134,557
Fair Value, Measurements, Recurring | Consolidated Blackstone Funds | Freestanding Derivatives    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total Investments 14,028 12,780
Fair Value, Measurements, Recurring | Consolidated Blackstone Funds | Equity Securities, Partnerships and LLC Interests    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total Investments [2] 5,127,446 5,127,909
Fair Value, Measurements, Recurring | Consolidated Blackstone Funds | Debt Instruments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total Investments 48,045 40,190
Fair Value, Measurements, Recurring | Consolidated Blackstone Funds | Net Asset Value    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total Investments [1] 1,070,757 819,419
Fair Value, Measurements, Recurring | Consolidated Blackstone Funds | Net Asset Value | Equity Securities, Partnerships and LLC Interests    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total Investments [1],[2] 1,070,757 819,419
Fair Value, Measurements, Recurring | Corporate Treasury Investments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total Investments 167,389 359,657
Fair Value, Measurements, Recurring | Corporate Treasury Investments | Net Asset Value    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total Investments [1] 11,029 61,000
Fair Value, Measurements, Recurring | Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash and Cash Equivalents 57,280 182,131
Total Investments 1,884,168 2,290,460
Assets 1,941,448 2,472,591
Securities Sold, Not Yet Purchased 1,967 1,978
Total Accounts Payable, Accrued Expenses and Other Liabilities 1,967 1,978
Liabilities 1,967 1,978
Fair Value, Measurements, Recurring | Level 1 | Freestanding Derivatives    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivatives liabilities   0
Fair Value, Measurements, Recurring | Level 1 | Other Investments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total Investments 1,806,783 2,207,914
Fair Value, Measurements, Recurring | Level 1 | Consolidated Blackstone Funds    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total Investments 4,041 7,616
Other Assets - Freestanding Derivatives   0
Fair Value, Measurements, Recurring | Level 1 | Consolidated Blackstone Funds | Equity Securities, Partnerships and LLC Interests    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total Investments [2] 4,041 7,616
Fair Value, Measurements, Recurring | Level 1 | Corporate Treasury Investments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total Investments 73,344 74,930
Fair Value, Measurements, Recurring | Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total Investments 5,168,199 4,586,021
Assets 5,319,564 4,717,214
Total Accounts Payable, Accrued Expenses and Other Liabilities 113,644 127,392
Liabilities 113,644 127,392
Fair Value, Measurements, Recurring | Level 2 | Freestanding Derivatives    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivatives liabilities 99,637 114,612
Fair Value, Measurements, Recurring | Level 2 | Consolidated Blackstone Funds - Freestanding Derivatives    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivatives liabilities 14,007 12,780
Fair Value, Measurements, Recurring | Level 2 | Other Investments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total Investments 4,922,949 4,313,592
Fair Value, Measurements, Recurring | Level 2 | Consolidated Blackstone Funds    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total Investments 206,537 229,754
Other Assets - Freestanding Derivatives 151,365 131,193
Fair Value, Measurements, Recurring | Level 2 | Consolidated Blackstone Funds | Freestanding Derivatives    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total Investments 14,028 12,780
Fair Value, Measurements, Recurring | Level 2 | Consolidated Blackstone Funds | Equity Securities, Partnerships and LLC Interests    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total Investments [2] 165,930 197,396
Fair Value, Measurements, Recurring | Level 2 | Consolidated Blackstone Funds | Debt Instruments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total Investments 26,579 19,578
Fair Value, Measurements, Recurring | Level 2 | Corporate Treasury Investments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total Investments 38,713 42,675
Fair Value, Measurements, Recurring | Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total Investments 4,545,755 4,503,535
Accounts Receivable - Loans and Receivables 425,981 205,158
Assets 4,977,009 4,712,057
Contingent Consideration 416 416
Total Accounts Payable, Accrued Expenses and Other Liabilities 1,151,709 1,124,744
Liabilities 1,151,709 1,124,744
Fair Value, Measurements, Recurring | Level 3 | Corporate Treasury Commitments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Corporate Treasury Commitments 2,038 181
Fair Value, Measurements, Recurring | Level 3 | Freestanding Derivatives    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivatives liabilities 1,149,255 1,124,147
Fair Value, Measurements, Recurring | Level 3 | Other Investments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total Investments 593,268 198,393
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total Investments 3,908,184 4,124,090
Other Assets - Freestanding Derivatives 5,273 3,364
Assets 3,908,184 4,124,090
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Equity Securities, Partnerships and LLC Interests    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total Investments [2] 3,886,718 4,103,478
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Debt Instruments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total Investments 21,466 20,612
Fair Value, Measurements, Recurring | Level 3 | Corporate Treasury Investments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total Investments $ 44,303 $ 181,052
[1] A summary of the investments where the fair value is not readily determinable and NAV is used as a practical expedient as of March 31, 2026 is presented by strategy type below:
[2] Equity Securities, Partnership and LLC Interest includes investments in investment funds.