v3.26.1
Financial Assets and Liabilities at Fair Value (Detail) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Accounts Receivable - Loans and Receivables $ 394,761 $ 205,158
Assets 6,870,025 5,093,618
Corporate Treasury Commitments $ 1,599 $ 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 $ 158,251 $ 147,337
Derivatives liabilities 116,691 127,392
Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets 4,631,059 4,712,057
Liabilities 1,153,812 1,124,744
Fair Value, Measurements, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash and Cash Equivalents 280,120 182,131
Total Investments 13,695,963 12,276,243
Accounts Receivable - Loans and Receivables 394,761 205,158
Assets 0 12,798,089
Contingent Consideration 152 416
Securities Sold, Not Yet Purchased 1,953 1,978
Total Accounts Payable, Accrued Expenses and Other Liabilities 1,272,456 1,254,114
Liabilities 1,272,456 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 1,599 181
Fair Value, Measurements, Recurring | Freestanding Derivatives    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivatives liabilities 1,258,698 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 10,054 12,780
Fair Value, Measurements, Recurring | Other Investments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total Investments 8,060,683 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] 1,103,881 896,227
Assets [1] 0 896,227
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] 24,281 15,808
Fair Value, Measurements, Recurring | Consolidated Blackstone Funds    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total Investments 5,233,815 5,180,879
Other Assets - Freestanding Derivatives 148,223 134,557
Fair Value, Measurements, Recurring | Consolidated Blackstone Funds | Freestanding Derivatives    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total Investments 10,028 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] 5,177,688 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 46,099 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] 1,020,481 819,419
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] 1,020,481 819,419
Fair Value, Measurements, Recurring | Corporate Treasury Investments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total Investments 401,465 359,657
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] 59,119 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 280,120 182,131
Total Investments 2,266,265 2,290,460
Assets 0 2,472,591
Securities Sold, Not Yet Purchased 1,953 1,978
Total Accounts Payable, Accrued Expenses and Other Liabilities 1,953 1,978
Liabilities 1,953 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 1,992,894 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 2,916 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] 2,916 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 270,455 74,930
Fair Value, Measurements, Recurring | Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total Investments 6,098,391 4,586,021
Assets 0 4,717,214
Total Accounts Payable, Accrued Expenses and Other Liabilities 116,691 127,392
Liabilities 116,691 127,392
Fair Value, Measurements, Recurring | Level 2 | Freestanding Derivatives    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivatives liabilities 106,637 114,612
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 10,054 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 5,838,664 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 224,977 229,754
Other Assets - Freestanding Derivatives 139,351 131,193
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 10,028 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] 192,078 197,396
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 22,871 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 34,750 42,675
Fair Value, Measurements, Recurring | Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total Investments 4,227,426 4,503,535
Accounts Receivable - Loans and Receivables 394,761 205,158
Assets 0 4,712,057
Contingent Consideration 152 416
Total Accounts Payable, Accrued Expenses and Other Liabilities 1,153,812 1,124,744
Liabilities 1,153,812 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 1,599 181
Fair Value, Measurements, Recurring | Level 3 | Freestanding Derivatives    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivatives liabilities 1,152,061 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 204,844 198,393
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total Investments 3,985,441 4,124,090
Other Assets - Freestanding Derivatives 8,872 3,364
Assets 3,985,441 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] 3,962,213 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 23,228 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 $ 37,141 $ 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 June 30, 2026 is presented by strategy type below:
[2] Equity Securities, Partnership and LLC Interest includes investments in investment funds.