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Financial Assets and Liabilities at Fair Value (Detail) - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Accounts Receivable - Loans and Receivables |  | $ 95,532 | $ 60,738
Assets |  | 3,138,009 | 3,957,327
Loans Payable - CLO Notes Payable |  | 10,740,171 | 11,304,059
Corporate Treasury Commitments |  | $ 170,722 | $ 688,386
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] |  |  |
Derivatives assets |  | $ 190,464 | $ 190,079
Derivatives liabilities |  | 97,974 | 90,635
Level 3 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Assets |  | 2,886,067 | 3,277,350
Liabilities |  | 647,393 | 565,637
Fair Value, Measurements, Recurring |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Cash and Cash Equivalents |  | 214,997 | 263,574
Total Investments |  | 8,334,449 | 9,273,604
Accounts Receivable - Loans and Receivables |  | 95,532 | 60,738
Assets |  | 8,808,642 | 9,768,806
Securities Sold, Not Yet Purchased |  | 3,867 | 3,886
Contingent Consideration |  | 504 | 387
Total Accounts Payable, Accrued Expenses and Other Liabilities |  | 749,235 | 660,158
Liabilities |  | 919,070 | 1,347,280
Fair Value, Measurements, Recurring | Corporate Treasury Commitments |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Corporate Treasury Commitments |  | 887 | 1,264
Fair Value, Measurements, Recurring | CLO Notes Payable |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Loans Payable - CLO Notes Payable |  | 169,835 | 687,122
Fair Value, Measurements, Recurring | Freestanding Derivatives |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivatives liabilities |  | 743,977 | 654,621
Fair Value, Measurements, Recurring | Other Investments |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Total Investments |  | 4,677,562 | 4,150,251
Fair Value, Measurements, Recurring | Net Asset Value |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Total Investments |  | 476,093 | 565,534
Assets |  | 476,093 | 565,534
Fair Value, Measurements, Recurring | Net Asset Value | Other Investments |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Total Investments |  | 7,081 | 7,275
Fair Value, Measurements, Recurring | Consolidated Blackstone Funds |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Total Investments |  | 3,458,911 | 4,319,483
Derivatives assets |  | 163,664 | 170,890
Fair Value, Measurements, Recurring | Consolidated Blackstone Funds | Freestanding Derivatives |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Total Investments |  | 26,800 | 19,189
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 | [1] | 3,286,537 | 3,345,645
Fair Value, Measurements, Recurring | Consolidated Blackstone Funds | Debt Instruments |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Total Investments |  | 145,574 | 954,649
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 |  | 469,012 | 558,259
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] | 469,012 | 558,259
Fair Value, Measurements, Recurring | Corporate Treasury Investments |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Total Investments |  | 197,976 | 803,870
Fair Value, Measurements, Recurring | Level 1 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Cash and Cash Equivalents |  | 214,997 | 263,574
Total Investments |  | 2,084,917 | 1,647,301
Assets |  | 2,299,914 | 1,910,965
Securities Sold, Not Yet Purchased |  | 3,867 | 3,886
Total Accounts Payable, Accrued Expenses and Other Liabilities |  | 3,867 | 4,322
Liabilities |  | 3,867 | 4,322
Fair Value, Measurements, Recurring | Level 1 | Freestanding Derivatives |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivatives liabilities |  | 0 | 436
Fair Value, Measurements, Recurring | Level 1 | Other Investments |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Total Investments |  | 2,006,970 | 1,564,112
Fair Value, Measurements, Recurring | Level 1 | Consolidated Blackstone Funds |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Total Investments |  | 10,259 | 11,118
Derivatives assets |  | 0 | 90
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 | [1] | 10,259 | 11,118
Fair Value, Measurements, Recurring | Level 1 | Corporate Treasury Investments |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Total Investments |  | 67,688 | 72,071
Fair Value, Measurements, Recurring | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Total Investments |  | 2,988,716 | 3,857,328
Assets |  | 3,146,568 | 4,014,957
Total Accounts Payable, Accrued Expenses and Other Liabilities |  | 97,975 | 90,199
Liabilities |  | 267,810 | 777,321
Fair Value, Measurements, Recurring | Level 2 | CLO Notes Payable |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Loans Payable - CLO Notes Payable |  | 169,835 | 687,122
Fair Value, Measurements, Recurring | Level 2 | Freestanding Derivatives |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivatives liabilities |  | 97,975 | 90,199
Fair Value, Measurements, Recurring | Level 2 | Other Investments |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Total Investments |  | 2,590,956 | 2,355,423
Fair Value, Measurements, Recurring | Level 2 | Consolidated Blackstone Funds |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Total Investments |  | 276,048 | 1,066,475
Derivatives assets |  | 157,852 | 157,629
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 |  | 26,800 | 19,189
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 | [1] | 119,238 | 123,022
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 |  | 130,010 | 924,264
Fair Value, Measurements, Recurring | Level 2 | Corporate Treasury Investments |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Total Investments |  | 121,712 | 435,430
Fair Value, Measurements, Recurring | Level 3 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Total Investments |  | 2,784,723 | 3,203,441
Accounts Receivable - Loans and Receivables |  | 95,532 | 60,738
Assets |  | 2,886,067 | 3,277,350
Contingent Consideration |  | 504 | 387
Total Accounts Payable, Accrued Expenses and Other Liabilities |  | 647,393 | 565,637
Liabilities |  | 647,393 | 565,637
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 |  | 887 | 1,264
Fair Value, Measurements, Recurring | Level 3 | Freestanding Derivatives |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivatives liabilities |  | 646,002 | 563,986
Fair Value, Measurements, Recurring | Level 3 | Other Investments |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Total Investments |  | 72,555 | 223,441
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Total Investments |  | 2,703,592 | 2,683,631
Derivatives assets |  | 5,812 | 13,171
Assets |  | 2,703,592 | 2,683,631
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 | [1] | 2,688,028 | 2,653,246
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 |  | 15,564 | 30,385
Fair Value, Measurements, Recurring | Level 3 | Corporate Treasury Investments |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Total Investments |  | $ 8,576 | $ 296,369
[1] | Equity Securities, Partnership and LLC Interest includes investments in investment funds.

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