v3.26.1
Summary of Quantitative Inputs and Assumptions for Items Categorized in Level III of Fair Value Hierarchy (Detail)
$ in Thousands
 6 Months Ended 12 Months Ended
Jun. 30, 2026
USD ($)
Dec. 31, 2025
USD ($)
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair value assets $ 6,870,025 $ 5,093,618
Level 3    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair value assets 4,631,059 4,712,057
Fair value liabilities 1,153,812 1,124,744
Fair Value, Measurements, Recurring    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair value assets 0 12,798,089
Fair value liabilities 1,272,456 1,254,114
Fair Value, Measurements, Recurring | Level 3    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair value assets 0 4,712,057
Fair value liabilities 1,153,812 1,124,744
Fair Value, Measurements, Recurring | Level 3 | Loans and Receivables | Discounted Cash Flows    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair value assets $ 394,761 $ 205,158
Fair Value, Measurements, Recurring | Level 3 | Minimum | Loans and Receivables | Discounted Cash Flows | Measurement Input, Discount Rate    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Unobservable inputs, rate 7.70% 7.40%
Fair Value, Measurements, Recurring | Level 3 | Maximum | Loans and Receivables | Discounted Cash Flows | Measurement Input, Discount Rate    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Unobservable inputs, rate 19.70% 18.30%
Fair Value, Measurements, Recurring | Level 3 | Weighted Average | Loans and Receivables | Discounted Cash Flows | Measurement Input, Discount Rate    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Unobservable inputs, rate [1] 8.90% 8.30%
Fair Value, Measurements, Recurring | Level 3 | Other Investments | Discounted Cash Flows    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair value assets [2] $ 213,716 $ 201,757
Fair Value, Measurements, Recurring | Level 3 | Other Investments | Minimum | Discounted Cash Flows | Measurement Input, Discount Rate    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Unobservable inputs, rate [2] 7.20% 7.20%
Fair Value, Measurements, Recurring | Level 3 | Other Investments | Maximum | Discounted Cash Flows | Measurement Input, Discount Rate    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Unobservable inputs, rate [2] 7.90% 7.90%
Fair Value, Measurements, Recurring | Level 3 | Other Investments | Weighted Average | Discounted Cash Flows | Measurement Input, Discount Rate    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Unobservable inputs, rate [1],[2] 7.50% 7.50%
Fair Value, Measurements, Recurring | Level 3 | Freestanding Derivatives | Valuation Technique, Option Pricing Model    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair value liabilities [3] $ 1,152,061 $ 1,124,147
Fair Value, Measurements, Recurring | Level 3 | Freestanding Derivatives | Minimum | Valuation Technique, Option Pricing Model | Measurement Input, Price Volatility    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Volatility 5.6 [3] 5.7
Fair Value, Measurements, Recurring | Level 3 | Freestanding Derivatives | Maximum | Valuation Technique, Option Pricing Model | Measurement Input, Price Volatility    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Volatility 5.7 [3] 5.8
Fair Value, Measurements, Recurring | Level 3 | Freestanding Derivatives | Weighted Average | Valuation Technique, Option Pricing Model | Measurement Input, Price Volatility    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Volatility [1] 5.6 5.7 [3]
Fair Value, Measurements, Recurring | Level 3 | Other Liabilities | Third Party Pricing Valuation Technique    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair value liabilities [4] $ 1,751 $ 597
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair value assets 3,985,441 4,124,090
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Equity Securities, Partnerships and LLC Interests | Discounted Cash Flows    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair value assets $ 3,962,213 $ 4,103,478
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Equity Securities, Partnerships and LLC Interests | Minimum | Discounted Cash Flows | Measurement Input, Discount Rate    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Unobservable inputs, rate 4.40% 4.30%
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Equity Securities, Partnerships and LLC Interests | Minimum | Discounted Cash Flows | EBITDA Multiple Market    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Exit Multiple - EBITDA 5.8 5
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Equity Securities, Partnerships and LLC Interests | Minimum | Discounted Cash Flows | Measurement Input, Cap Rate    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Exit Capitalization Rate 3.10% 3.10%
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Equity Securities, Partnerships and LLC Interests | Maximum | Discounted Cash Flows | Measurement Input, Discount Rate    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Unobservable inputs, rate 41.20% 41.10%
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Equity Securities, Partnerships and LLC Interests | Maximum | Discounted Cash Flows | EBITDA Multiple Market    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Exit Multiple - EBITDA 30 30.6
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Equity Securities, Partnerships and LLC Interests | Maximum | Discounted Cash Flows | Measurement Input, Cap Rate    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Exit Capitalization Rate 15.60% 15.30%
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Equity Securities, Partnerships and LLC Interests | Weighted Average | Discounted Cash Flows | Measurement Input, Discount Rate    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Unobservable inputs, rate [1] 10.20% 10.20%
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Equity Securities, Partnerships and LLC Interests | Weighted Average | Discounted Cash Flows | EBITDA Multiple Market    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Exit Multiple - EBITDA [1] 15.5 16.6
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Equity Securities, Partnerships and LLC Interests | Weighted Average | Discounted Cash Flows | Measurement Input, Cap Rate    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Exit Capitalization Rate [1] 5.20% 5.10%
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Debt Instruments | Discounted Cash Flows    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair value assets $ 23,228 $ 20,612
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Debt Instruments | Minimum | Discounted Cash Flows | Measurement Input, Discount Rate    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Unobservable inputs, rate 6.00% 6.10%
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Debt Instruments | Maximum | Discounted Cash Flows | Measurement Input, Discount Rate    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Unobservable inputs, rate 20.20% 20.00%
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Debt Instruments | Weighted Average | Discounted Cash Flows | Measurement Input, Discount Rate    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Unobservable inputs, rate [1] 14.10% 12.20%
Fair Value, Measurements, Recurring | Level 3 | Corporate Treasury Investments | Discounted Cash Flows    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair value assets $ 37,141 $ 181,052
Fair Value, Measurements, Recurring | Level 3 | Corporate Treasury Investments | Discounted Cash Flows | Measurement Input, Discount Rate    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Unobservable inputs, rate 8.80%  
Fair Value, Measurements, Recurring | Level 3 | Corporate Treasury Investments | Minimum | Discounted Cash Flows | Measurement Input, Discount Rate    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Unobservable inputs, rate   8.70%
Fair Value, Measurements, Recurring | Level 3 | Corporate Treasury Investments | Maximum | Discounted Cash Flows | Measurement Input, Discount Rate    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Unobservable inputs, rate   11.10%
Fair Value, Measurements, Recurring | Level 3 | Corporate Treasury Investments | Weighted Average | Discounted Cash Flows | Measurement Input, Discount Rate    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Unobservable inputs, rate [1] 8.80% 9.90%
[1] Unobservable inputs were weighted based on the fair value of the investments included in the range.
[2] As of June 30, 2026 and December 31, 2025, Other Investments includes Level III Freestanding Derivatives.
[3] The volatility of the historical performance of the underlying reference entities or an appropriate proxy is used to project the expected returns relevant for the fair value of the derivatives.
[4] As of June 30, 2026 and December 31, 2025, Other Liabilities includes Level III Contingent Consideration and Level III Corporate Treasury Commitments.