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Summary of Quantitative Inputs and Assumptions for Items Categorized in Level III of Fair Value Hierarchy (Detail)
$ in Thousands

3 Months Ended

12 Months Ended

Mar. 31, 2024

USD ($)

Dec. 31, 2023

USD ($)

Fair Value, Option, Quantitative Disclosures [Line Items]

Fair value assets

$ 3,138,009

$ 3,957,327

Level 3

Fair Value, Option, Quantitative Disclosures [Line Items]

Fair value assets

2,886,067

3,277,350

Fair value liabilities

647,393

565,637

Fair Value, Measurements, Recurring

Fair Value, Option, Quantitative Disclosures [Line Items]

Fair value assets

8,808,642

9,768,806

Fair value liabilities

919,070

1,347,280

Fair Value, Measurements, Recurring | Level 3

Fair Value, Option, Quantitative Disclosures [Line Items]

Fair value assets

2,886,067

3,277,350

Fair value liabilities

647,393

565,637

Fair Value, Measurements, Recurring | Level 3 | Loans and Receivables | Discounted Cash Flows

Fair Value, Option, Quantitative Disclosures [Line Items]

Fair value assets

$ 95,532

$ 60,738

Fair Value, Measurements, Recurring | Level 3 | Minimum | Loans and Receivables | Measurement Input, Discount Rate

Fair Value, Option, Quantitative Disclosures [Line Items]

Unobservable inputs, rate

8.80%

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

8.80%

Fair Value, Measurements, Recurring | Level 3 | Maximum | Loans and Receivables | Measurement Input, Discount Rate

Fair Value, Option, Quantitative Disclosures [Line Items]

Unobservable inputs, rate

14.90%

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

14.00%

Fair Value, Measurements, Recurring | Level 3 | Weighted Average | Loans and Receivables | Measurement Input, Discount Rate

Fair Value, Option, Quantitative Disclosures [Line Items]

Unobservable inputs, rate

^[1]

10.30%

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]

10.30%

Fair Value, Measurements, Recurring | Level 3 | Other Investments | Third Party Pricing Valuation Technique

Fair Value, Option, Quantitative Disclosures [Line Items]

Fair value assets

^[2]

$ 78,367

$ 236,612

Fair Value, Measurements, Recurring | Level 3 | Freestanding Derivatives | Valuation Technique, Option Pricing Model

Fair Value, Option, Quantitative Disclosures [Line Items]

Fair value liabilities

^[3]

$ 646,002

$ 563,986

Fair Value, Measurements, Recurring | Level 3 | Freestanding Derivatives | Valuation Technique, Option Pricing Model | Measurement Input, Price Volatility

Fair Value, Option, Quantitative Disclosures [Line Items]

Volatility

6.2

6.3

^[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]

$ 1,391

$ 1,651

Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds

Fair Value, Option, Quantitative Disclosures [Line Items]

Fair value assets

2,703,592

2,683,631

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

$ 2,688,028

$ 2,653,246

Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Equity Securities, Partnerships and LLC Interests | Minimum | Measurement Input, Discount Rate

Fair Value, Option, Quantitative Disclosures [Line Items]

Unobservable inputs, rate

3.30%

Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Equity Securities, Partnerships and LLC Interests | Minimum | EBITDA Multiple Market

Fair Value, Option, Quantitative Disclosures [Line Items]

Exit Multiple - EBITDA

4

4

Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Equity Securities, Partnerships and LLC Interests | Minimum | 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 | Minimum | Discounted Cash Flows | Measurement Input, Discount Rate

Fair Value, Option, Quantitative Disclosures [Line Items]

Unobservable inputs, rate

3.30%

Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Equity Securities, Partnerships and LLC Interests | Maximum | Measurement Input, Discount Rate

Fair Value, Option, Quantitative Disclosures [Line Items]

Unobservable inputs, rate

38.00%

Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Equity Securities, Partnerships and LLC Interests | Maximum | EBITDA Multiple Market

Fair Value, Option, Quantitative Disclosures [Line Items]

Exit Multiple - EBITDA

30.6

30.6

Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Equity Securities, Partnerships and LLC Interests | Maximum | Measurement Input, Cap Rate

Fair Value, Option, Quantitative Disclosures [Line Items]

Exit Capitalization Rate

13.20%

12.80%

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

38.60%

Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Equity Securities, Partnerships and LLC Interests | Weighted Average | Measurement Input, Discount Rate

Fair Value, Option, Quantitative Disclosures [Line Items]

Unobservable inputs, rate

^[1]

9.70%

Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Equity Securities, Partnerships and LLC Interests | Weighted Average | EBITDA Multiple Market

Fair Value, Option, Quantitative Disclosures [Line Items]

Exit Multiple - EBITDA

^[1]

15

15

Fair Value, Measurements, Recurring | Level 3 | Consolidated Blackstone Funds | Equity Securities, Partnerships and LLC Interests | Weighted Average | Measurement Input, Cap Rate

Fair Value, Option, Quantitative Disclosures [Line Items]

Exit Capitalization Rate

^[1]

5.10%

5.10%

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]

10.10%

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

$ 15,564

$ 30,385

Fair Value, Measurements, Recurring | Level 3 | Corporate Treasury Investments | Discounted Cash Flows

Fair Value, Option, Quantitative Disclosures [Line Items]

Fair value assets

$ 296,369

Fair Value, Measurements, Recurring | Level 3 | Corporate Treasury Investments | Transaction Price Valuation Technique

Fair Value, Option, Quantitative Disclosures [Line Items]

Fair value assets

$ 8,576

Fair Value, Measurements, Recurring | Level 3 | Corporate Treasury Investments | Minimum | Measurement Input, Discount Rate

Fair Value, Option, Quantitative Disclosures [Line Items]

Unobservable inputs, rate

11.20%

Fair Value, Measurements, Recurring | Level 3 | Corporate Treasury Investments | Maximum | Measurement Input, Discount Rate

Fair Value, Option, Quantitative Disclosures [Line Items]

Unobservable inputs, rate

22.40%

Fair Value, Measurements, Recurring | Level 3 | Corporate Treasury Investments | Weighted Average | Measurement Input, Discount Rate

Fair Value, Option, Quantitative Disclosures [Line Items]

Unobservable inputs, rate

^[1]

17.10%

[1]	Unobservable inputs were weighted based on the fair value of the investments included in the range.
[2]	As of March 31, 2024 and December 31, 2023, Other Investments includes Level III Freestanding Derivatives.
[3]	The volatility of the historical performance of the underlying reference entity is used to project the expected returns relevant for the fair value of the derivative.
[4]	As of March 31, 2024 and December 31, 2023, Other Liabilities includes Level III Contingent Consideration and Level III Corporate Treasury Commitments.

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