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Consolidated Statement of Changes in Equity (Parenthetical)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Series I Preferred Stock [Member]
Conversion Of Stocks	one share outstanding	one share outstanding	one share outstanding
Series II Preferred Stock [Member]
Conversion Of Stocks	one share outstanding	one share outstanding	one share outstanding

X

- Definition

A unique description of a noncash or part noncash stock conversion. The description would be expected to include sufficient information to provide an understanding of the nature and purpose of the conversion. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

+ References

No definition available.

+ Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_StatementClassOfStockAxis=bx_SeriesOnePreferredstockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementClassOfStockAxis=bx_SeriesTwoPreferredStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: