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Summary of Quantitative Inputs and Assumptions for Items Categorized in Level III of Fair Value Hierarchy (Detail) - USD ($)
$ in Thousands
 6 Months Ended 12 Months Ended
Jun. 30, 2019
Dec. 31, 2018
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair value assets $ 7,958,297 $ 7,990,666
Fair Value, Measurements, Recurring    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair value assets 12,073,426 11,771,078
Fair Value, Measurements, Recurring | Level 3    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair value assets 1,376,979 1,724,374
Fair Value, Measurements, Recurring | Level 3 | Loans and Receivables | Discounted Cash Flows    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair value assets 168,611 $ 304,173
Fair Value, Measurements, Recurring | Level 3 | Loans and Receivables | Third Party Pricing Valuation Technique    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair value assets $ 19,220  
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 7.10% 6.10%
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 9.50% 12.80%
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 8.30% 8.70%
Fair Value, Measurements, Recurring | Level 3 | Other Investments | Discounted Cash Flows    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair value assets $ 24,550 $ 26,631
Fair Value, Measurements, Recurring | Level 3 | Other Investments | Discounted Cash Flows | Measurement Input Recovery Rate [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Recovery Rate 70.00%  
Fair Value, Measurements, Recurring | Level 3 | Other Investments | Transaction Price Valuation Technique    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair value assets   $ 4,986
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 0.50% 1.00%
Fair Value, Measurements, Recurring | Level 3 | Other Investments | Minimum | Discounted Cash Flows | Measurement Input, Default Rate    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Unobservable inputs, rate 2.00% 2.00%
Fair Value, Measurements, Recurring | Level 3 | Other Investments | Minimum | Discounted Cash Flows | Measurement Input, Constant Prepayment Rate    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Unobservable inputs, rate 20.00%  
Fair Value, Measurements, Recurring | Level 3 | Other Investments | Minimum | Discounted Cash Flows | Measurement Input, Expected Term [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Recovery Lag 12 months 12 months
Fair Value, Measurements, Recurring | Level 3 | Other Investments | Minimum | Discounted Cash Flows | Measurement Input Recovery Rate [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Recovery Rate   70.00%
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 10.30% 15.00%
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 2.00% 2.80%
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair value assets $ 1,140,096 $ 1,364,016
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Discounted Cash Flows    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair value assets 12,664  
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Assets Of Consolidated CLO Vehicles | Discounted Cash Flows    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair value assets 37 41
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Assets Of Consolidated CLO Vehicles | Third Party Pricing Valuation Technique    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair value assets $ 457,175 $ 673,317
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Assets Of Consolidated CLO Vehicles | Minimum | Measurement Input, Discount Rate    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Unobservable inputs, rate 1.70%  
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Assets Of Consolidated CLO Vehicles | Minimum | Discounted Cash Flows | Measurement Input, Discount Rate    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Unobservable inputs, rate   5.00%
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Equity Securities | Discounted Cash Flows    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair value assets $ 175,622 $ 138,725
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Equity Securities | Market Comparable Companies    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair value assets 7,364 21,050
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Equity Securities | Other    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair value assets 8,344 21,492
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Equity Securities | Transaction Price Valuation Technique    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair value assets 4,523 20,250
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Equity Securities | Third Party Pricing Valuation Technique    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair value assets $ 466 $ 49
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Equity Securities | Minimum | Measurement Input, Discount Rate    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Unobservable inputs, rate 4.90%  
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Equity Securities | Minimum | Measurement Input, Revenue Multiple    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Book Value Multiple 0.9  
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Equity Securities | Minimum | Discounted Cash Flows    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Exit Capitalization Rate   5.00%
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Equity Securities | Minimum | Discounted Cash Flows | Measurement Input, Discount Rate    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Unobservable inputs, rate   7.10%
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Equity Securities | Minimum | Discounted Cash Flows | Measurement Input, Long-term Revenue Growth Rate    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Unobservable inputs, rate (4.90%) (0.80%)
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Equity Securities | Minimum | Discounted Cash Flows | Measurement Input, Revenue Multiple    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Book Value Multiple   0.9
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Equity Securities | Minimum | Discounted Cash Flows | Measurement Input, Cap Rate [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Exit Capitalization Rate 3.80%  
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Equity Securities | Minimum | Discounted Cash Flows | EBITDA Multiple Market    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Exit Multiple - EBITDA 0.1 0.1
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Equity Securities | Minimum | Discounted Cash Flows | Measurement Input Net Operating Income Rate[Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Exit Multiple - NOI   12.8
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Equity Securities | Minimum | Discounted Cash Flows | Measurement Input, Commodity Market Price [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Exit Multiple - P/E 17.0 17.0
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Equity Securities | Minimum | Discounted Cash Flows | Measurement Input Net Operating Income [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Exit Multiple - NOI 12.8  
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Equity Securities | Minimum | Market Comparable Companies    
Fair Value, Option, Quantitative Disclosures [Line Items]    
EBITDA Multiple 8.0  
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Equity Securities | Minimum | Market Comparable Companies | Measurement Input, Revenue Multiple    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Book Value Multiple 1.1 0.8
Dollar/Acre Multiple 7.0 7.0
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Equity Securities | Maximum | Measurement Input, Discount Rate    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Unobservable inputs, rate 32.10%  
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Equity Securities | Maximum | Measurement Input, Long-term Revenue Growth Rate    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Unobservable inputs, rate 28.60%  
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Equity Securities | Maximum | Measurement Input, Revenue Multiple    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Book Value Multiple 9.5  
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Equity Securities | Maximum | Discounted Cash Flows    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Exit Capitalization Rate   11.40%
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Equity Securities | Maximum | Discounted Cash Flows | Measurement Input, Discount Rate    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Unobservable inputs, rate   26.10%
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Equity Securities | Maximum | Discounted Cash Flows | Measurement Input, Long-term Revenue Growth Rate    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Unobservable inputs, rate   32.40%
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Equity Securities | Maximum | Discounted Cash Flows | Measurement Input, Revenue Multiple    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Book Value Multiple   9.5
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Equity Securities | Maximum | Discounted Cash Flows | Measurement Input, Cap Rate [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Exit Capitalization Rate 11.40%  
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Equity Securities | Maximum | Discounted Cash Flows | EBITDA Multiple Market    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Exit Multiple - EBITDA 16.5 17.5
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Equity Securities | Maximum | Market Comparable Companies    
Fair Value, Option, Quantitative Disclosures [Line Items]    
EBITDA Multiple 13.0  
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Equity Securities | Maximum | Market Comparable Companies | Measurement Input, Revenue Multiple    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Book Value Multiple   8.0
Dollar/Acre Multiple 18.0 44.1
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Equity Securities | Weighted Average | Measurement Input, Discount Rate    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Unobservable inputs, rate 12.60%  
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Equity Securities | Weighted Average | Measurement Input, Long-term Revenue Growth Rate    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Unobservable inputs, rate 6.70%  
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Equity Securities | Weighted Average | Measurement Input, Revenue Multiple    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Book Value Multiple 8.9  
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Equity Securities | Weighted Average | Discounted Cash Flows    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Exit Capitalization Rate   8.00%
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Equity Securities | Weighted Average | Discounted Cash Flows | Measurement Input, Discount Rate    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Unobservable inputs, rate   12.60%
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Equity Securities | Weighted Average | Discounted Cash Flows | Measurement Input, Long-term Revenue Growth Rate    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Unobservable inputs, rate   6.60%
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Equity Securities | Weighted Average | Discounted Cash Flows | Measurement Input, Revenue Multiple    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Book Value Multiple   8.3
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Equity Securities | Weighted Average | Discounted Cash Flows | Measurement Input, Cap Rate [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Exit Capitalization Rate 7.70%  
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Equity Securities | Weighted Average | Discounted Cash Flows | EBITDA Multiple Market    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Exit Multiple - EBITDA 10.1 10.3
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Equity Securities | Weighted Average | Market Comparable Companies    
Fair Value, Option, Quantitative Disclosures [Line Items]    
EBITDA Multiple 10.0  
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Equity Securities | Weighted Average | Market Comparable Companies | Measurement Input, Revenue Multiple    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Book Value Multiple   1.3
Dollar/Acre Multiple 16.4 32.9
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Partnership And LLC Interests | Discounted Cash Flows    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair value assets $ 304,234 $ 295,251
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Partnership And LLC Interests | Market Comparable Companies    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair value assets 8,332 9,444
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Partnership And LLC Interests | Other    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair value assets 3,087 9,390
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Partnership And LLC Interests | Transaction Price Valuation Technique    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair value assets 29,063 $ 41,188
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Partnership And LLC Interests | Third Party Pricing Valuation Technique    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair value assets $ 763  
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Partnership And LLC Interests | Minimum | Measurement Input, Discount Rate    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Unobservable inputs, rate 3.80%  
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Partnership And LLC Interests | Minimum | Measurement Input, Revenue Multiple    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Book Value Multiple 1.2  
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Partnership And LLC Interests | Minimum | Discounted Cash Flows    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Exit Capitalization Rate   2.90%
Exit Multiple - NOI 13.3  
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Partnership And LLC Interests | Minimum | Discounted Cash Flows | Measurement Input, Discount Rate    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Unobservable inputs, rate   4.10%
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Partnership And LLC Interests | Minimum | Discounted Cash Flows | Measurement Input, Long-term Revenue Growth Rate    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Unobservable inputs, rate (4.90%) (1.10%)
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Partnership And LLC Interests | Minimum | Discounted Cash Flows | Measurement Input, Revenue Multiple    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Book Value Multiple   8.5
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Partnership And LLC Interests | Minimum | Discounted Cash Flows | Measurement Input, Cap Rate [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Exit Capitalization Rate 2.70%  
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Partnership And LLC Interests | Minimum | Discounted Cash Flows | EBITDA Multiple Market    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Exit Multiple - EBITDA 3.5 0.1
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Partnership And LLC Interests | Minimum | Discounted Cash Flows | Measurement Input Net Operating Income Rate[Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Exit Multiple - NOI   13.3
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Partnership And LLC Interests | Minimum | Market Comparable Companies | Measurement Input, Revenue Multiple    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Book Value Multiple   1.1
Dollar/Acre Multiple 6.5 5.3
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Partnership And LLC Interests | Maximum | Measurement Input, Discount Rate    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Unobservable inputs, rate 26.50%  
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Partnership And LLC Interests | Maximum | Measurement Input, Long-term Revenue Growth Rate    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Unobservable inputs, rate 27.50%  
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Partnership And LLC Interests | Maximum | Discounted Cash Flows    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Exit Capitalization Rate   15.00%
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Partnership And LLC Interests | Maximum | Discounted Cash Flows | Measurement Input, Discount Rate    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Unobservable inputs, rate   26.50%
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Partnership And LLC Interests | Maximum | Discounted Cash Flows | Measurement Input, Long-term Revenue Growth Rate    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Unobservable inputs, rate   48.40%
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Partnership And LLC Interests | Maximum | Discounted Cash Flows | Measurement Input, Revenue Multiple    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Book Value Multiple   9.3
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Partnership And LLC Interests | Maximum | Discounted Cash Flows | Measurement Input, Cap Rate [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Exit Capitalization Rate 15.50%  
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Partnership And LLC Interests | Maximum | Discounted Cash Flows | EBITDA Multiple Market    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Exit Multiple - EBITDA 15.7 15.3
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Partnership And LLC Interests | Maximum | Market Comparable Companies | Measurement Input, Revenue Multiple    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Dollar/Acre Multiple 12.0 12.0
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Partnership And LLC Interests | Weighted Average | Measurement Input, Discount Rate    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Unobservable inputs, rate 9.50%  
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Partnership And LLC Interests | Weighted Average | Measurement Input, Long-term Revenue Growth Rate    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Unobservable inputs, rate 17.60%  
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Partnership And LLC Interests | Weighted Average | Discounted Cash Flows    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Exit Capitalization Rate   6.30%
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Partnership And LLC Interests | Weighted Average | Discounted Cash Flows | Measurement Input, Discount Rate    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Unobservable inputs, rate   9.70%
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Partnership And LLC Interests | Weighted Average | Discounted Cash Flows | Measurement Input, Long-term Revenue Growth Rate    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Unobservable inputs, rate   26.90%
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Partnership And LLC Interests | Weighted Average | Discounted Cash Flows | Measurement Input, Revenue Multiple    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Book Value Multiple   9.2
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Partnership And LLC Interests | Weighted Average | Discounted Cash Flows | Measurement Input, Cap Rate [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Exit Capitalization Rate 5.70%  
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Partnership And LLC Interests | Weighted Average | Discounted Cash Flows | EBITDA Multiple Market    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Exit Multiple - EBITDA 9.9 10.0
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Partnership And LLC Interests | Weighted Average | Market Comparable Companies | Measurement Input, Revenue Multiple    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Dollar/Acre Multiple 8.1 7.5
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Debt Instruments | Discounted Cash Flows    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair value assets   $ 8,342
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Debt Instruments | Other    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair value assets $ 13  
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Debt Instruments | Transaction Price Valuation Technique    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair value assets 36,341 4,634
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Debt Instruments | Third Party Pricing Valuation Technique    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair value assets $ 92,068 $ 120,843
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Debt Instruments | Minimum | Measurement Input, Discount Rate    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Unobservable inputs, rate 7.00%  
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   7.00%
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Debt Instruments | Minimum | Discounted Cash Flows | Measurement Input, Long-term Revenue Growth Rate    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Unobservable inputs, rate   0.70%
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Debt Instruments | Minimum | Discounted Cash Flows | Measurement Input, Cap Rate [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Exit Capitalization Rate 4.20%  
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Debt Instruments | Minimum | Discounted Cash Flows | EBITDA Multiple Market    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Exit Multiple - EBITDA 6.5 6.5
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Debt Instruments | Maximum | Measurement Input, Discount Rate    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Unobservable inputs, rate 28.50%  
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   19.30%
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Debt Instruments | Maximum | Discounted Cash Flows | Measurement Input, Cap Rate [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Exit Capitalization Rate 8.00%  
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Debt Instruments | Maximum | Discounted Cash Flows | EBITDA Multiple Market    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Exit Multiple - EBITDA 10.5  
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Debt Instruments | Weighted Average | Measurement Input, Discount Rate    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Unobservable inputs, rate 9.90%  
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   9.80%
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Debt Instruments | Weighted Average | Discounted Cash Flows | Measurement Input, Cap Rate [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Exit Capitalization Rate 5.80%  
Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Debt Instruments | Weighted Average | Discounted Cash Flows | EBITDA Multiple Market    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Exit Multiple - EBITDA 9.3  
Fair Value, Measurements, Recurring | Level 3 | Corporate Treasury Investments | Discounted Cash Flows    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair value assets $ 10,395 $ 7,947
Fair Value, Measurements, Recurring | Level 3 | Corporate Treasury Investments | Market Comparable Companies    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair value assets 195  
Fair Value, Measurements, Recurring | Level 3 | Corporate Treasury Investments | Third Party Pricing Valuation Technique    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair value assets $ 13,912 $ 16,621
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 3.20% 4.40%
Fair Value, Measurements, Recurring | Level 3 | Corporate Treasury Investments | Minimum | Discounted Cash Flows | Measurement Input, Default Rate    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Unobservable inputs, rate 2.00% 2.00%
Fair Value, Measurements, Recurring | Level 3 | Corporate Treasury Investments | Minimum | Discounted Cash Flows | Measurement Input, Constant Prepayment Rate    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Unobservable inputs, rate 20.00% 20.00%
Fair Value, Measurements, Recurring | Level 3 | Corporate Treasury Investments | Minimum | Discounted Cash Flows | Measurement Input, Expected Term [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Recovery Lag 12 months 12 months
Fair Value, Measurements, Recurring | Level 3 | Corporate Treasury Investments | Minimum | Discounted Cash Flows | Measurement Input Recovery Rate [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Recovery Rate 15.60% 17.50%
Fair Value, Measurements, Recurring | Level 3 | Corporate Treasury Investments | Minimum | Market Comparable Companies | Measurement Input Reinvestment Rate [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
EBITDA Multiple 14.6  
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 9.00% 7.50%
Fair Value, Measurements, Recurring | Level 3 | Corporate Treasury Investments | Maximum | Discounted Cash Flows | Measurement Input, Expected Term [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Recovery Lag 21 months 13 months
Fair Value, Measurements, Recurring | Level 3 | Corporate Treasury Investments | Maximum | Discounted Cash Flows | Measurement Input Recovery Rate [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Recovery Rate 70.00% 70.00%
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 7.10% 6.60%
Fair Value, Measurements, Recurring | Level 3 | Corporate Treasury Investments | Weighted Average | Discounted Cash Flows | Measurement Input Recovery Rate [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Recovery Rate 67.40% 67.70%
Fair Value, Measurements, Recurring | Level 3 | Corporate Treasury Investments | Other Investments | Discounted Cash Flows | Measurement Input, Constant Prepayment Rate    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Unobservable inputs, rate   20.00%