Blackstone Private Equity Strategies Fund 10-Q 14 May 24 2024 Q1 Quarterly report Financial data

Cover Page

Cover Page - shares	3 Months Ended
	Mar. 31, 2024	Apr. 30, 2024
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Quarterly Report	true
Document Transition Report	false
Entity Registrant Name	Blackstone Private Equity Strategies Fund L.P.
Entity Central Index Key	0001930054
Document Period End Date	Mar. 31, 2024
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q1
Current Fiscal Year End Date	--12-31
Entity Incorporation, State or Country Code	DE
Entity File Number	000-56446
Entity Tax Identification Number	88-1872156
Entity Address, Address Line One	345 Park Avenue
Entity Address, City or Town	New York
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	10154
City Area Code	212
Local Phone Number	583-5000
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Shell Company	false
Class S Units [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		39,585,382
Class D Units [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		1,851,672
Class I Units [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		50,917,245

Condensed Statements of Assets

Condensed Statements of Assets and Liabilities - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Assets
Investments at Fair Value	$ 1,965,305	$ 0
Cash and Cash Equivalents	504	100
Total Assets	1,965,809	100
Liabilities and Net Assets
Due to Affiliates	78	0
Accounts Payable, Accrued Expenses and Other Liabilities	575	0
Servicing Fees Payable	54,435	0
Total Liabilities	55,088	0
Commitments and Contingencies
Net Assets
General Partner Interest	250	0
Total Net Assets	1,910,721	100
Total Liabilities and Net Assets	1,965,809	100
BXPE US Aggregator (CYM) L.P [Member]
Assets
Investments at Fair Value	1,526,650	0
Investments in Affiliated Investee Funds at Fair Value (Cost $593,561)	603,712	0
Cash and Cash Equivalents	569,082	0
Accounts Receivable	4,861	0
Other Assets	2,513	0
Deferred Assets	1,929	0
Total Assets	2,708,747	0
Liabilities and Net Assets
Due to Affiliates	29	0
Accounts Payable and Accrued Expenses	902	0
Payable for Investments Purchased	131,594	0
Taxes Payable	314	0
Administration Fees Payable	456	0
Organization Costs Payable	5,359	0
Offering Costs Payable	2,572	0
Accrued Performance Participation Allocation	5,212	0
Total Liabilities	146,438	0
Commitments and Contingencies
Net Assets
Total Net Assets	2,562,309	0
Total Liabilities and Net Assets	2,708,747	0
Class S Units [Member]
Net Assets
Limited Partnership Unit	765,797	0
Class D Units [Member]
Net Assets
Limited Partnership Unit	40,287	0
Class I Units [Member]
Net Assets
Limited Partnership Unit	1,104,387	100
Capital Unit, Class A [Member] | BXPE US Aggregator (CYM) L.P [Member]
Net Assets
Limited Partnership Unit	2,562,309	0
Capital Unit, Class B [Member] | BXPE US Aggregator (CYM) L.P [Member]
Net Assets
Limited Partnership Unit	$ 0	$ 0

Condensed Statements of Asset_2

Condensed Statements of Assets and Liabilities (Parenthetical) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Investment owned, cost	$ 1,937,411
BXPE US Aggregator (CYM) L.P [Member]
Investment owned, cost	1,517,770
Investment, Affiliated Issuer [Member] | BXPE US Aggregator (CYM) L.P [Member]
Investment owned, cost	$ 593,561
Class S Units [Member]
Units authorized	unlimited	unlimited
Units issued	32,272,800	0
Units outstanding	32,272,800	0
Class D Units [Member]
Units authorized	unlimited	unlimited
Units issued	1,616,129	0
Units outstanding	1,616,129	0
Class I Units [Member]
Units authorized	unlimited	unlimited
Units issued	43,433,515	4,000
Units outstanding	43,433,515	4,000
Capital Unit, Class A [Member] | BXPE US Aggregator (CYM) L.P [Member]
Units authorized	unlimited	unlimited
Units issued	100,725,569	0
Units outstanding	100,725,569	0
Capital Unit, Class B [Member] | BXPE US Aggregator (CYM) L.P [Member]
Units authorized	unlimited	unlimited
Units issued	0	0
Units outstanding	0	0

Condensed Statements of Operati

Condensed Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Expenses
Professional Fees	$ 477	$ 0
Directors' Fees	261	0
Warehousing Fees	1,166	0
Other	4	0
Total Expenses	1,908	0
Warehousing Fees Waived	(1,166)	0
Net Expenses	742	0
Net Investment Income (Loss)	(742)	0
Net Realized and Unrealized Gain (Loss) on Investments and Translation of Assets and Liabilities in Foreign Currencies
Net Change in Unrealized Gain (Loss) on Investments Allocated from BXPE US Aggregator (CYM) L.P.	27,894	0
Net Increase in Net Assets Resulting from Operations	27,152	0
BXPE US Aggregator (CYM) L.P [Member]
Investment Income, Net [Abstract]
Interest Income	25,934	0
Other	54	0
Total Income	25,988	0
Expenses
Professional Fees	931	0
Other	907	0
Management Fees	5,699	0
Organizational expenses	5,435	0
Performance Participation Allocation	5,212	0
Deferred Offering Costs Amortization	643	0
Administration Fees	456	0
Total Expenses	19,283	0
Management Fees Waived	(5,699)	0
Expense Support	(187)	0
Net Expenses	13,397	0
Net Investment Income Before Provision for Taxes	12,591	0
Provision for Taxes	314	0
Net Investment Income (Loss)	12,277	0
Net Realized and Unrealized Gain (Loss) on Investments and Translation of Assets and Liabilities in Foreign Currencies
Net Change in Unrealized Gain (Loss) on Investments Allocated from BXPE US Aggregator (CYM) L.P.	(136)	0
Net Change in Unrealized Gain (Loss) on Investments	21,014	0
Net Change in Unrealized Gain (Loss) on Translation of Assets and Liabilities in Foreign Currencies	(2,340)	0
Net Realized and Unrealized Gain (Loss) on Investments and Translation of Assets and Liabilities in Foreign Currencies	18,538	0
Net Increase in Net Assets Resulting from Operations	$ 30,815	$ 0

Condensed Statements of Changes

Condensed Statements of Changes in Net Assets - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Investment Company, Change in Net Assets [Line Items]
Net Assets	$ 100
Proceeds from Units Issued	1,938,750
Net Investment Income (Loss)	(742)	$ 0
Net Realized Gain (Loss) on Investments	27,894	0
Servicing Fees	(55,281)
Net Assets	1,910,721	100
BXPE US Aggregator (CYM) L.P [Member]
Investment Company, Change in Net Assets [Line Items]
Net Assets	0
Proceeds from Units Issued	2,531,494
Net Investment Income (Loss)	12,277	0
Net Realized Gain (Loss) on Investments	(136)	0
Net Change in Unrealized Gain (Loss) on Investments	21,014	0
Net Change in Unrealized Gain (Loss) on Translation of Assets and Liabilities in Foreign Currencies	(2,340)	0
Net Assets	2,562,309	0
Class S Units [Member]
Investment Company, Change in Net Assets [Line Items]
Net Assets	0
Proceeds from Units Issued	809,127
Net Investment Income (Loss)	(305)
Net Realized Gain (Loss) on Investments	11,453
Servicing Fees	(54,478)
Net Assets	765,797	0
Class D Units [Member]
Investment Company, Change in Net Assets [Line Items]
Net Assets	0
Proceeds from Units Issued	40,500
Net Investment Income (Loss)	(16)
Net Realized Gain (Loss) on Investments	606
Servicing Fees	(803)
Net Assets	40,287	0
Class I Units [Member]
Investment Company, Change in Net Assets [Line Items]
Net Assets	100
Proceeds from Units Issued	1,088,873
Net Investment Income (Loss)	(421)
Net Realized Gain (Loss) on Investments	15,835
Servicing Fees	0
Net Assets	1,104,387	100
General Partner Interest [Member]
Investment Company, Change in Net Assets [Line Items]
Net Assets	0
Proceeds from Units Issued	250
Net Investment Income (Loss)	0
Net Realized Gain (Loss) on Investments	0
Servicing Fees	0
Net Assets	250	0
Class A Units [Member] | BXPE US Aggregator (CYM) L.P [Member]
Investment Company, Change in Net Assets [Line Items]
Net Assets	0
Proceeds from Units Issued	2,531,494
Net Investment Income (Loss)	12,277
Net Realized Gain (Loss) on Investments	(136)
Net Change in Unrealized Gain (Loss) on Investments	21,014
Net Change in Unrealized Gain (Loss) on Translation of Assets and Liabilities in Foreign Currencies	(2,340)
Net Assets	2,562,309	0
Class B Units [Member] | BXPE US Aggregator (CYM) L.P [Member]
Investment Company, Change in Net Assets [Line Items]
Net Assets	0
Proceeds from Units Issued	0
Net Investment Income (Loss)	0
Net Realized Gain (Loss) on Investments	0
Net Change in Unrealized Gain (Loss) on Investments	0
Net Change in Unrealized Gain (Loss) on Translation of Assets and Liabilities in Foreign Currencies	0
Net Assets	$ 0	$ 0

Condensed Schedule of Investmen

Condensed Schedule of Investments $ in Thousands	Mar. 31, 2024 USD ($)
Summary of Investment Holdings [Line Items]
Fair Value	$ 1,965,305
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Affiliated Investee Funds | BSOF Parallel Onshore Fund L.P. | Investee Fund | North America
Summary of Investment Holdings [Line Items]
Fair Value	$ 44,608
Fair Value as a Percentage of NetAssets	1.70%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Affiliated Investee Funds | BSOF SRT Parallel Onshore Fund L.P. | Investee Fund | North America
Summary of Investment Holdings [Line Items]
Fair Value	$ 71,421
Fair Value as a Percentage of NetAssets	2.80%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Affiliated Investee Funds | Bayswater Park CLO, Ltd. | Investee Fund | North America
Summary of Investment Holdings [Line Items]
Fair Value	$ 39,992	[1]
Fair Value as a Percentage of NetAssets	1.60%	[1]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Affiliated Investee Funds | Blackstone Credit Rated Fund Trust LP | Investee Fund | North America
Summary of Investment Holdings [Line Items]
Fair Value	$ 17,295
Fair Value as a Percentage of NetAssets	0.70%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Affiliated Investee Funds | Captree Park CLO, Ltd. | Investee Fund | North America
Summary of Investment Holdings [Line Items]
Fair Value	$ 357,096	[1],[2]
Fair Value as a Percentage of NetAssets	13.90%	[1],[2]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Affiliated Investee Funds | Peebles Park CLO, Ltd. | Investee Fund | North America
Summary of Investment Holdings [Line Items]
Fair Value	$ 46,485	[1]
Fair Value as a Percentage of NetAssets	1.80%	[1]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Affiliated Investee Funds | SP Tortuga Acquisitions L.P. | Investee Fund | North America
Summary of Investment Holdings [Line Items]
Fair Value	$ 24,600
Fair Value as a Percentage of NetAssets	1%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Affiliated Investee Funds | Strategic Partners IX Investments - B L.P. | Investee Fund | Various
Summary of Investment Holdings [Line Items]
Fair Value	$ 2,215
Fair Value as a Percentage of NetAssets	0.10%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Affiliated Investee Funds |Total Affiliated Investee Funds (Cost $593,561)
Summary of Investment Holdings [Line Items]
Fair Value	$ 603,712
Fair Value as a Percentage of NetAssets	23.60%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Cash and Cash Equivalents | Short Term Investments | Total Short Term Investments (Cost $399,233)
Summary of Investment Holdings [Line Items]
Fair Value	$ 399,233
Fair Value as a Percentage of NetAssets	15.60%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Cash and Cash Equivalents | Short Term Investments | U.S. Treasury Bill, 0.0%, due 4/2/2024, par $100,000 | Short Term Investment | North America
Summary of Investment Holdings [Line Items]
Fair Value	$ 99,796
Fair Value as a Percentage of NetAssets	3.90%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Cash and Cash Equivalents | Short Term Investments | U.S. Treasury Bill, 0.0%, due 4/4/2024, par $300,000 | Short Term Investment | North America
Summary of Investment Holdings [Line Items]
Fair Value	$ 299,437
Fair Value as a Percentage of NetAssets	11.70%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Cash | Cash Held at Banks | Cash Held at Banks
Summary of Investment Holdings [Line Items]
Fair Value	$ 30,861
Fair Value as a Percentage of NetAssets	1.20%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Cash | Total Cash (Cost $30,861)
Summary of Investment Holdings [Line Items]
Fair Value	$ 30,861
Fair Value as a Percentage of NetAssets	1.20%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Consumer and Services | Investment In Portfolio Companies
Summary of Investment Holdings [Line Items]
Fair Value	$ 294,324	[3],[4]
Fair Value as a Percentage of NetAssets	11.50%	[3],[4]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Consumer and Services | Total Consumer and Services
Summary of Investment Holdings [Line Items]
Fair Value	$ 294,324
Fair Value as a Percentage of NetAssets	11.50%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Consumer and Services | Total Portfolio Companies (Cost $657,094)
Summary of Investment Holdings [Line Items]
Fair Value	$ 666,449
Fair Value as a Percentage of NetAssets	26%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Securities | Consumer and Services | Investment in Debt Securities | Bank Debt
Summary of Investment Holdings [Line Items]
Fair Value	$ 350,664	[4],[5]
Fair Value as a Percentage of NetAssets	13.70%	[4],[5]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Securities | Consumer and Services | Total Consumer and Services
Summary of Investment Holdings [Line Items]
Fair Value	$ 350,664
Fair Value as a Percentage of NetAssets	13.70%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Securities | Industrials and Energy | Investment in Debt Securities | Bank Debt
Summary of Investment Holdings [Line Items]
Fair Value	$ 370,246	[4],[6]
Fair Value as a Percentage of NetAssets	14.40%	[4],[6]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Securities | Industrials and Energy | Total Industrials and Energy
Summary of Investment Holdings [Line Items]
Fair Value	$ 370,246
Fair Value as a Percentage of NetAssets	14.40%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Securities | Real Estate | Investment in Debt Securities | Bank Debt | North America
Summary of Investment Holdings [Line Items]
Fair Value	$ 9,917
Fair Value as a Percentage of NetAssets	0.40%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Securities | Real Estate | Total Real Estate
Summary of Investment Holdings [Line Items]
Fair Value	$ 9,917
Fair Value as a Percentage of NetAssets	0.40%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Securities | Technology, Media and Telecommunications | Investment in Debt Securities | Bank Debt
Summary of Investment Holdings [Line Items]
Fair Value	$ 129,374	[4],[7]
Fair Value as a Percentage of NetAssets	5%	[4],[7]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Securities | Technology, Media and Telecommunications | Total Technology, Media and Telecommunications Two
Summary of Investment Holdings [Line Items]
Fair Value	$ 129,374
Fair Value as a Percentage of NetAssets	5%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Money Market Fund | Fidelity Institutional Treasury Portfolio Money Market Fund | Money Market
Summary of Investment Holdings [Line Items]
Fair Value	$ 138,988
Fair Value as a Percentage of NetAssets	5.40%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Money Market Fund | Total Money Market Fund (Cost $138,988)
Summary of Investment Holdings [Line Items]
Fair Value	$ 138,988
Fair Value as a Percentage of NetAssets	5.40%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Technology Media and Telecommunications | Total Technology, Media and Telecommunications
Summary of Investment Holdings [Line Items]
Fair Value	$ 372,125
Fair Value as a Percentage of NetAssets	14.50%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Technology Media and Telecommunications |Investments In Portfolio Companies
Summary of Investment Holdings [Line Items]
Fair Value	$ 372,125	[4],[8]
Fair Value as a Percentage of NetAssets	14.50%	[4],[8]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Total Cash and Cash Equivalents (Cost $569,082)
Summary of Investment Holdings [Line Items]
Fair Value	$ 569,082
Fair Value as a Percentage of NetAssets	22.20%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Total Debt Securities (Cost $860,676)
Summary of Investment Holdings [Line Items]
Fair Value	$ 860,201
Fair Value as a Percentage of NetAssets	33.60%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Total Investments (Cost $1,517,770)
Summary of Investment Holdings [Line Items]
Fair Value	$ 1,526,650
Fair Value as a Percentage of NetAssets	59.60%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Total Investments, Investments in Affiliated Investee Funds and Cash and Cash Equivalents (Cost $2,680,413)
Summary of Investment Holdings [Line Items]
Fair Value	$ 2,699,444
Fair Value as a Percentage of NetAssets	105.40%
Investment, Identifier [Axis]: Investments | BXPE US Aggregator CYM L.P | Investee Fund | Various | Various
Summary of Investment Holdings [Line Items]
Fair Value	$ 1,965,305
Fair Value as a Percentage of NetAssets	102.90%
Investment, Identifier [Axis]: Investments | Total Investments (Cost $1,937,411)
Summary of Investment Holdings [Line Items]
Fair Value	$ 1,965,305
Fair Value as a Percentage of NetAssets	102.90%
[1]The Aggregator’s interest in this investment is held through Blackstone CLO Management, LLC – Series 9.[2]The Aggregator’s allocable share of individual investments held within Captree Park CLO, Ltd. were all below 5% of the Aggregator’s net assets.[3]Fair value shown is comprised of 43.2% Consumer, 31.0% Business Services and 25.8% Insurance. Fair value is comprised of 47.7% common equity, 28.4% preferred equity, 21.4% convertible preferred equity and 2.5% warrants. 68.2% of fair value shown is domiciled in North America and 31.8% of fair value in Europe.[4]There were no single investments included in this category that exceeded 5% of net assets.[5]Fair value shown is comprised of 51.3% Consumer, 31.7% of Financial Services and 17.0% Health Care. 87.4% of fair value shown is domiciled in North America, 11.5% in Europe and 1.1% in Asia.[6]Fair value shown is comprised of 93.8% Industrials and 6.2% Energy. 97.6% of fair value shown is domiciled in North America and 2.4% in Europe.[7]97.2% of fair value shown is domiciled in North America and 2.8% in Europe.[8]Fair value shown is comprised of 86.2% common equity and 13.8% debt. 97.3% of fair value shown is domiciled in North America and 2.7% in Europe.

Condensed Schedule of Investm_2

Condensed Schedule of Investments (Parenthetical) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2024	Dec. 31, 2023
Schedule of Investments [Line Items]
Total Investments (Cost $1,937,411)		$ 1,937,411
Investment Owned, Fair Value		1,965,305	$ 0
Cash and Cash Equivalents, at Carrying Value		504	100
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Affiliated Investee Funds | BSOF Parallel Onshore Fund L.P. | Investee Fund | North America
Schedule of Investments [Line Items]
Investment Owned, Fair Value		$ 44,608
Investment Owned, Percent of Net Assets		1.70%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Affiliated Investee Funds | BSOF SRT Parallel Onshore Fund L.P. | Investee Fund | North America
Schedule of Investments [Line Items]
Investment Owned, Fair Value		$ 71,421
Investment Owned, Percent of Net Assets		2.80%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Affiliated Investee Funds | Bayswater Park CLO, Ltd. | Investee Fund | North America
Schedule of Investments [Line Items]
Investment Owned, Fair Value	[1]	$ 39,992
Investment Owned, Percent of Net Assets	[1]	1.60%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Affiliated Investee Funds | Blackstone Credit Rated Fund Trust LP | Investee Fund | North America
Schedule of Investments [Line Items]
Investment Owned, Fair Value		$ 17,295
Investment Owned, Percent of Net Assets		0.70%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Affiliated Investee Funds | Captree Park CLO, Ltd. | Investee Fund | North America
Schedule of Investments [Line Items]
Investment Owned, Fair Value	[1],[2]	$ 357,096
Investment Owned, Percent of Net Assets	[1],[2]	13.90%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Affiliated Investee Funds | Peebles Park CLO, Ltd. | Investee Fund | North America
Schedule of Investments [Line Items]
Investment Owned, Fair Value	[1]	$ 46,485
Investment Owned, Percent of Net Assets	[1]	1.80%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Affiliated Investee Funds | SP Tortuga Acquisitions L.P. | Investee Fund | North America
Schedule of Investments [Line Items]
Investment Owned, Fair Value		$ 24,600
Investment Owned, Percent of Net Assets		1%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Affiliated Investee Funds | Strategic Partners IX Investments - B L.P. | Investee Fund | Various
Schedule of Investments [Line Items]
Investment Owned, Fair Value		$ 2,215
Investment Owned, Percent of Net Assets		0.10%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Affiliated Investee Funds |Total Affiliated Investee Funds (Cost $593,561)
Schedule of Investments [Line Items]
Total Investments (Cost $1,937,411)		$ 593,561
Investment Owned, Fair Value		$ 603,712
Investment Owned, Percent of Net Assets		23.60%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Cash and Cash Equivalents | Short Term Investments | Total Short Term Investments (Cost $399,233)
Schedule of Investments [Line Items]
Total Investments (Cost $1,937,411)		$ 399,233
Investment Owned, Fair Value		$ 399,233
Investment Owned, Percent of Net Assets		15.60%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Cash and Cash Equivalents | Short Term Investments | U.S. Treasury Bill, 0.0%, due 4/2/2024, par $100,000 | Short Term Investment | North America
Schedule of Investments [Line Items]
Investment Owned, Fair Value		$ 99,796
Investment Owned, Percent of Net Assets		3.90%
Treasury Stock, Value, Acquired, Par Value Method		$ 100,000
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Cash and Cash Equivalents | Short Term Investments | U.S. Treasury Bill, 0.0%, due 4/4/2024, par $300,000 | Short Term Investment | North America
Schedule of Investments [Line Items]
Investment Owned, Fair Value		$ 299,437
Investment Owned, Percent of Net Assets		11.70%
Treasury Stock, Value, Acquired, Par Value Method		$ 300,000
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Cash | Cash Held at Banks | Cash Held at Banks
Schedule of Investments [Line Items]
Investment Owned, Fair Value		$ 30,861
Investment Owned, Percent of Net Assets		1.20%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Cash | Total Cash (Cost $30,861)
Schedule of Investments [Line Items]
Investment Owned, Fair Value		$ 30,861
Investment Owned, Percent of Net Assets		1.20%
Cash		$ 30,861
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Consumer and Services | Investment In Portfolio Companies
Schedule of Investments [Line Items]
Investment Owned, Fair Value	[3],[4]	$ 294,324
Investment Owned, Percent of Net Assets	[3],[4]	11.50%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Consumer and Services | Total Consumer and Services
Schedule of Investments [Line Items]
Investment Owned, Fair Value		$ 294,324
Investment Owned, Percent of Net Assets		11.50%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Consumer and Services | Total Portfolio Companies (Cost $657,094)
Schedule of Investments [Line Items]
Total Investments (Cost $1,937,411)		$ 657,094
Investment Owned, Fair Value		$ 666,449
Investment Owned, Percent of Net Assets		26%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Securities | Consumer and Services | Investment in Debt Securities | Bank Debt
Schedule of Investments [Line Items]
Investment Owned, Fair Value	[4],[5]	$ 350,664
Investment Owned, Percent of Net Assets	[4],[5]	13.70%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Securities | Consumer and Services | Total Consumer and Services
Schedule of Investments [Line Items]
Investment Owned, Fair Value		$ 350,664
Investment Owned, Percent of Net Assets		13.70%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Securities | Industrials and Energy | Investment in Debt Securities | Bank Debt
Schedule of Investments [Line Items]
Investment Owned, Fair Value	[4],[6]	$ 370,246
Investment Owned, Percent of Net Assets	[4],[6]	14.40%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Securities | Industrials and Energy | Total Industrials and Energy
Schedule of Investments [Line Items]
Investment Owned, Fair Value		$ 370,246
Investment Owned, Percent of Net Assets		14.40%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Securities | Real Estate | Investment in Debt Securities | Bank Debt | North America
Schedule of Investments [Line Items]
Investment Owned, Fair Value		$ 9,917
Investment Owned, Percent of Net Assets		0.40%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Securities | Real Estate | Total Real Estate
Schedule of Investments [Line Items]
Investment Owned, Fair Value		$ 9,917
Investment Owned, Percent of Net Assets		0.40%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Securities | Technology, Media and Telecommunications | Investment in Debt Securities | Bank Debt
Schedule of Investments [Line Items]
Investment Owned, Fair Value	[4],[7]	$ 129,374
Investment Owned, Percent of Net Assets	[4],[7]	5%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Securities | Technology, Media and Telecommunications | Total Technology, Media and Telecommunications Two
Schedule of Investments [Line Items]
Investment Owned, Fair Value		$ 129,374
Investment Owned, Percent of Net Assets		5%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Money Market Fund | Fidelity Institutional Treasury Portfolio Money Market Fund | Money Market
Schedule of Investments [Line Items]
Investment Owned, Fair Value		$ 138,988
Investment Owned, Percent of Net Assets		5.40%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Money Market Fund | Total Money Market Fund (Cost $138,988)
Schedule of Investments [Line Items]
Total Investments (Cost $1,937,411)		$ 138,988
Investment Owned, Fair Value		$ 138,988
Investment Owned, Percent of Net Assets		5.40%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Technology Media and Telecommunications | Total Technology, Media and Telecommunications
Schedule of Investments [Line Items]
Investment Owned, Fair Value		$ 372,125
Investment Owned, Percent of Net Assets		14.50%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Technology Media and Telecommunications |Investments In Portfolio Companies
Schedule of Investments [Line Items]
Investment Owned, Fair Value	[4],[8]	$ 372,125
Investment Owned, Percent of Net Assets	[4],[8]	14.50%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Total Cash and Cash Equivalents (Cost $569,082)
Schedule of Investments [Line Items]
Investment Owned, Fair Value		$ 569,082
Investment Owned, Percent of Net Assets		22.20%
Cash and Cash Equivalents, at Carrying Value		$ 569,082
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Total Debt Securities (Cost $860,676)
Schedule of Investments [Line Items]
Total Investments (Cost $1,937,411)		860,676
Investment Owned, Fair Value		$ 860,201
Investment Owned, Percent of Net Assets		33.60%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Total Investments (Cost $1,517,770)
Schedule of Investments [Line Items]
Investment Owned, Fair Value		$ 1,526,650
Investment Owned, Percent of Net Assets		59.60%
Debt Securities, Trading, Amortized Cost		$ 1,517,770
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Total Investments, Investments in Affiliated Investee Funds and Cash and Cash Equivalents (Cost $2,680,413)
Schedule of Investments [Line Items]
Total Investments (Cost $1,937,411)		2,680,413
Investment Owned, Fair Value		$ 2,699,444
Investment Owned, Percent of Net Assets		105.40%
Investment, Identifier [Axis]: Investments | BXPE US Aggregator CYM L.P | Investee Fund | Various | Various
Schedule of Investments [Line Items]
Investment Owned, Fair Value		$ 1,965,305
Investment Owned, Percent of Net Assets		102.90%
Investment, Identifier [Axis]: Investments | Total Investments (Cost $1,937,411)
Schedule of Investments [Line Items]
Total Investments (Cost $1,937,411)		$ 1,937,411
Investment Owned, Fair Value		$ 1,965,305
Investment Owned, Percent of Net Assets		102.90%
BXPE US Aggregator (CYM) L.P [Member]
Schedule of Investments [Line Items]
Total Investments (Cost $1,937,411)		$ 1,517,770
Investment Owned, Fair Value		1,526,650	0
Cash and Cash Equivalents, at Carrying Value		$ 569,082	$ 0
BXPE US Aggregator (CYM) L.P [Member] | Consumer Sector [Member] | Consumer And Services [Member]
Schedule of Investments [Line Items]
Investment Owned, Percent of Net Assets		51.30%
BXPE US Aggregator (CYM) L.P [Member] | Financial Services Sector [Member] | Consumer And Services [Member]
Schedule of Investments [Line Items]
Investment Owned, Percent of Net Assets		31.70%
BXPE US Aggregator (CYM) L.P [Member] | Healthcare Sector [Member] | Consumer And Services [Member]
Schedule of Investments [Line Items]
Investment Owned, Percent of Net Assets		17%
BXPE US Aggregator (CYM) L.P [Member] | Debt Securities [Member] | Insurance Sector [Member]
Schedule of Investments [Line Items]
Investment Owned, Percent of Net Assets		93.80%
BXPE US Aggregator (CYM) L.P [Member] | Debt Securities [Member] | Energy Sector [Member]
Schedule of Investments [Line Items]
Investment Owned, Percent of Net Assets		6.20%
BXPE US Aggregator (CYM) L.P [Member] | Consumer Portfolio [Member] | Consumer Sector [Member]
Schedule of Investments [Line Items]
Investment Owned, Percent of Net Assets		43.20%
BXPE US Aggregator (CYM) L.P [Member] | Consumer Portfolio [Member] | Business Service [Member]
Schedule of Investments [Line Items]
Investment Owned, Percent of Net Assets		31%
BXPE US Aggregator (CYM) L.P [Member] | Consumer Portfolio [Member] | Insurance Sector [Member]
Schedule of Investments [Line Items]
Investment Owned, Percent of Net Assets		25.80%
BXPE US Aggregator (CYM) L.P [Member] | North America [Member] | Technology Media And Telecommunications [Member]
Schedule of Investments [Line Items]
Investment Owned, Percent of Net Assets		97.20%
BXPE US Aggregator (CYM) L.P [Member] | North America [Member] | Consumer And Services [Member]
Schedule of Investments [Line Items]
Investment Owned, Percent of Net Assets		87.40%
BXPE US Aggregator (CYM) L.P [Member] | North America [Member] | Commercial Portfolio [Member]
Schedule of Investments [Line Items]
Investment Owned, Percent of Net Assets		97.30%
BXPE US Aggregator (CYM) L.P [Member] | North America [Member] | Debt Securities [Member]
Schedule of Investments [Line Items]
Investment Owned, Percent of Net Assets		97.60%
BXPE US Aggregator (CYM) L.P [Member] | North America [Member] | Consumer Portfolio [Member]
Schedule of Investments [Line Items]
Investment Owned, Percent of Net Assets		68.20%
BXPE US Aggregator (CYM) L.P [Member] | Europe [Member] | Technology Media And Telecommunications [Member]
Schedule of Investments [Line Items]
Investment Owned, Percent of Net Assets		2.80%
BXPE US Aggregator (CYM) L.P [Member] | Europe [Member] | Consumer And Services [Member]
Schedule of Investments [Line Items]
Investment Owned, Percent of Net Assets		11.50%
BXPE US Aggregator (CYM) L.P [Member] | Europe [Member] | Commercial Portfolio [Member]
Schedule of Investments [Line Items]
Investment Owned, Percent of Net Assets		2.70%
BXPE US Aggregator (CYM) L.P [Member] | Europe [Member] | Debt Securities [Member]
Schedule of Investments [Line Items]
Investment Owned, Percent of Net Assets		2.40%
BXPE US Aggregator (CYM) L.P [Member] | Europe [Member] | Consumer Portfolio [Member]
Schedule of Investments [Line Items]
Investment Owned, Percent of Net Assets		31.80%
BXPE US Aggregator (CYM) L.P [Member] | Asia [Member] | Consumer And Services [Member]
Schedule of Investments [Line Items]
Investment Owned, Percent of Net Assets		1.10%
BXPE US Aggregator (CYM) L.P [Member] | Equity Funds [Member] | Commercial Portfolio [Member]
Schedule of Investments [Line Items]
Investment Owned, Percent of Net Assets		86.20%
BXPE US Aggregator (CYM) L.P [Member] | Equity Funds [Member] | Consumer Portfolio [Member]
Schedule of Investments [Line Items]
Investment Owned, Percent of Net Assets		47.70%
BXPE US Aggregator (CYM) L.P [Member] | Debt [Member] | Commercial Portfolio [Member]
Schedule of Investments [Line Items]
Investment Owned, Percent of Net Assets		13.80%
BXPE US Aggregator (CYM) L.P [Member] | Preferred Stock [Member] | Consumer Portfolio [Member]
Schedule of Investments [Line Items]
Investment Owned, Percent of Net Assets		28.40%
BXPE US Aggregator (CYM) L.P [Member] | Convertible Preferred Stock [Member] | Consumer Portfolio [Member]
Schedule of Investments [Line Items]
Investment Owned, Percent of Net Assets		21.40%
BXPE US Aggregator (CYM) L.P [Member] | Warranty, Rights and Obligations, Fair Value Option [Member] | Consumer Portfolio [Member]
Schedule of Investments [Line Items]
Investment Owned, Percent of Net Assets		2.50%
BXPE US Aggregator (CYM) L.P [Member] | Maximum [Member]
Schedule of Investments [Line Items]
Investment Owned, Fair Value		$ 0
Investment Owned, Percent of Net Assets		5%
BXPE US Aggregator (CYM) L.P [Member] | Captree Park CLO, Ltd. [Member] | Maximum [Member]
Schedule of Investments [Line Items]
Investment Owned, Percent of Net Assets		5%
[1]The Aggregator’s interest in this investment is held through Blackstone CLO Management, LLC – Series 9.[2]The Aggregator’s allocable share of individual investments held within Captree Park CLO, Ltd. were all below 5% of the Aggregator’s net assets.[3]Fair value shown is comprised of 43.2% Consumer, 31.0% Business Services and 25.8% Insurance. Fair value is comprised of 47.7% common equity, 28.4% preferred equity, 21.4% convertible preferred equity and 2.5% warrants. 68.2% of fair value shown is domiciled in North America and 31.8% of fair value in Europe.[4]There were no single investments included in this category that exceeded 5% of net assets.[5]Fair value shown is comprised of 51.3% Consumer, 31.7% of Financial Services and 17.0% Health Care. 87.4% of fair value shown is domiciled in North America, 11.5% in Europe and 1.1% in Asia.[6]Fair value shown is comprised of 93.8% Industrials and 6.2% Energy. 97.6% of fair value shown is domiciled in North America and 2.4% in Europe.[7]97.2% of fair value shown is domiciled in North America and 2.8% in Europe.[8]Fair value shown is comprised of 86.2% common equity and 13.8% debt. 97.3% of fair value shown is domiciled in North America and 2.7% in Europe.

Condensed Statements of Cash Fl

Condensed Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Operating Activities
Net Increase in Net Assets Resulting from Operations	$ 27,152	$ 0
Investment in Aggregator	(1,937,411)	0
Adjustments to Reconcile Net Increase in Net Assets Resulting from Operations to Net Cash Provided by (Used in) Operating Activities
Net Change in Unrealized (Gain) Loss on Investments	(27,894)	0
Issuance of Class I Units for Directors' Fees	184	0
Cash Flows Due to Changes in Operating Assets and Liabilities
Accounts Payable, Accrued Expenses and Other Liabilities	575	0
Due to Affiliates	78	0
Servicing Fees Payable	(846)	0
Net Cash Provided by (Used in) Operating Activities	(1,938,162)	0
Financing Activities
Proceeds from Issuance of Units	1,938,566	0
Net Cash Provided by (Used in) Financing Activities	1,938,566	0
Cash and Cash Equivalents
Net Increase (Decrease)	404	0
Beginning of Period	100	100
End of Period	504	100
Supplemental Disclosure of Non-Cash Investing and Financing Activities
Issuance of Class I Units for Directors' Fees	184	0
Accrued Servicing Fees	55,281	0
BXPE US Aggregator (CYM) L.P [Member]
Operating Activities
Net Increase in Net Assets Resulting from Operations	30,815	0
Purchases of Investments	(2,247,624)	0
Proceeds from Investments	136,152	0
Adjustments to Reconcile Net Increase in Net Assets Resulting from Operations to Net Cash Provided by (Used in) Operating Activities
Net Realized (Gain) Loss on Investments	136	0
Net Change in Unrealized (Gain) Loss on Investments	(21,014)	0
Net Change in Unrealized (Gain) Loss on Translation of Assets and Liabilities in Foreign Currencies	2,340	0
Net Amortization of Debt Securities	34	0
Deferred Offering Costs Amortization	643	0
Cash Flows Due to Changes in Operating Assets and Liabilities
Accounts Receivable	(4,861)	0
Other Assets	(2,513)	0
Deferred Assets	(2,572)	0
Due to Affiliates	29	0
Accounts Payable and Accrued Expenses	516	0
Payable for Investments Purchased	131,594	0
Taxes Payable	314	0
Administration Fees Payable	456	0
Organization Costs Payable	5,359	0
Offering Costs Payable	2,572	0
Accrued Performance Participation Allocation	5,212	0
Net Cash Provided by (Used in) Operating Activities	(1,962,412)	0
Financing Activities
Proceeds from Issuance of Units	2,531,494	0
Net Cash Provided by (Used in) Financing Activities	2,531,494	0
Cash and Cash Equivalents
Net Increase (Decrease)	569,082	0
Beginning of Period	0	0
End of Period	$ 569,082	$ 0

Organization

Organization	3 Months Ended
	Mar. 31, 2024
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Organization	1. Organization Blackstone Private Equity Strategies Fund L.P. (“BXPE U.S.”) is a Delaware limited partnership formed on April 5, 2022, and is a private fund exempt from registration under Section 3(c)(7) of the Investment Company Act of 1940, as amended (the “1940 Act”). BXPE U.S. is structured as a perpetual-life strategy, with monthly, fully-funded subscriptions and periodic repurchase offers. BXPE U.S. is conducting a continuous private offering of its Units (as defined below) in reliance on exemptions from the registration requirements of the Securities Act of 1933, as amended (the “Securities Act”), to investors that are both (a) accredited investors (as defined in Regulation D under the Securities Act) and (b) qualified purchasers (as defined in the 1940 Act and rules thereunder). Blackstone Private Equity Strategies Fund (TE) L.P. (the “Feeder”), a Delaware limited partnership, is a feeder vehicle for BXPE U.S. The Feeder invests all or substantially all of its assets in BXPE U.S. The Feeder was established for certain investors with particular tax characteristics, such as tax-exempt non-U.S. BXPE U.S. invests all or substantially all of its assets through its investment in BXPE US Aggregator (CYM) L.P. (the “Aggregator”). The Aggregator has the same investment objectives as BXPE U.S. The condensed consolidated financial statements of the Aggregator, including the Condensed Consolidated Schedule of Investments, are an integral part of BXPE U.S.’s condensed financial statements and are included following these condensed financial statements. The term “Parallel Fund” refers to one or more parallel vehicles established by, or at the direction of, the Sponsor (as defined below) to invest alongside BXPE U.S., but excluding Blackstone Private Strategies Fund SICAV (“BXPE Lux”). The Parallel Funds may be established for certain investors with particular legal, tax, regulatory, compliance, structuring or certain other operational requirements to participate in the Aggregator. Parallel Funds may not have investment objectives and/or strategies that are identical to the investment objectives and strategies of BXPE U.S. or the Feeder. BXPE U.S., the Feeder, the Aggregator and its consolidated subsidiaries and any Parallel Funds collectively form “BXPE.” BXPE and BXPE Lux collectively form the “BXPE Fund Program.” BXPE’s investment objectives are to deliver medium-to Investment operations commenced on January 2, 2024 when BXPE U.S. and the Feeder first sold unregistered limited partnership units (the “Units”) to third parties and began investing. Blackstone Private Equity Strategies Associates L.P., a Delaware limited partnership, is the general partner (the “General Partner”) of the Feeder, BXPE U.S. and the Aggregator. Overall responsibility for oversight of BXPE U.S. and the entities that carry out its investment objectives rests with the General Partner, subject to certain oversight rights held by BXPE U.S.’s board of directors (the “Board of Directors”). The General Partner has delegated BXPE U.S.’s portfolio management function to Blackstone Private Investments Advisors L.L.C. (the “Investment Manager”). The Investment Manager has discretion to make investments on behalf of BXPE U.S. and is responsible for initiating, structuring and negotiating BXPE U.S.’s investments, as well as actively managing each investment to seek to maximize value. The Investment Manager and its affiliates also provide certain administrative services to BXPE U.S. The Investment Manager is a Delaware limited liability company and is registered with the United States Securities and Exchange Commission (“SEC”) as an investment adviser under the Investment Advisers Act of 1940, as amended. The General Partner and the Investment Manager are individually and collectively referred to as the “Sponsor.” Both the General Partner and Investment Manager are subsidiaries of Blackstone.
BXPE US Aggregator (CYM) L.P [Member]
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Organization	1. Organization BXPE US Aggregator (CYM) L.P. is a Cayman Islands exempted limited partnership formed on June 15, 2023. BXPE US Aggregator (CYM) L.P. with its consolidated subsidiaries collectively form the “Aggregator.” The Aggregator operates in accordance with the limited partnership agreement, as amended and restated (the “Aggregator Partnership Agreement”). Blackstone Private Equity Strategies Fund L.P. (“BXPE U.S.”) and Blackstone Private Equity Strategies Fund (TE) L.P. (the “Feeder”) are private funds exempt from registration under Section 3(c)(7) of the Investment Company Act of 1940, as amended (the “1940 Act”). BXPE U.S. and the Feeder are structured as a perpetual-life strategy, with monthly, fully-funded subscriptions and periodic repurchase offers. The Feeder is a feeder vehicle for BXPE U.S. and invests all or substantially all of its assets in BXPE U.S. In turn, BXPE U.S. invests all or substantially all of its assets in the Aggregator. The Aggregator has the same investment objectives as BXPE U.S. The term “Parallel Fund” refers to one or more parallel vehicles established by, or at the direction of, the Sponsor (as defined below) to invest alongside BXPE U.S., but excluding Blackstone Private Strategies Fund SICAV (“BXPE Lux”). The Parallel Funds may be established for certain investors with particular legal, tax, regulatory, compliance, structuring or certain other operational requirements to participate in the Aggregator. Parallel Funds may not have investment objectives and/or strategies that are identical to the investment objectives and strategies of BXPE U.S. or the Feeder. Parallel Funds are expected to invest directly, or indirectly through one or more intermediate entities, into the Aggregator. BXPE U.S., the Feeder, the Aggregator and its consolidated subsidiaries and any Parallel Funds collectively form “BXPE.” BXPE and BXPE Lux collectively form the “BXPE Fund Program.” BXPE’s investment objectives are to deliver medium-to Investment operations commenced on January 2, 2024 when BXPE U.S. and the Feeder sold unregistered limited partnership units (the “Units”) and subsequently invested those proceeds into the Aggregator. Blackstone Private Equity Strategies Associates L.P., a Delaware limited partnership, is the general partner (the “General Partner”) of the Feeder, BXPE U.S. and the Aggregator. Overall responsibility for oversight of BXPE U.S. and the entities that carry out its investment objectives rests with the General Partner, subject to certain oversight rights held by BXPE U.S.’s board of directors (the “Board of Directors”). The General Partner has delegated BXPE U.S.’s portfolio management function to Blackstone Private Investments Advisors L.L.C. (the “Investment Manager”). The Investment Manager has discretion to make investments on behalf of BXPE U.S. and is responsible for initiating, structuring and negotiating BXPE U.S.’s investments, as well as actively managing each investment to seek to maximize value. The Investment Manager and its affiliates also provide certain administrative services to BXPE U.S. The Investment Manager is a Delaware limited liability company and is registered with the United States Securities and Exchange Commission (“SEC”) as an investment adviser under the Investment Advisers Act of 1940, as amended. The General Partner and the Investment Manager are individually and collectively referred to as the “Sponsor.” Both the General Partner and Investment Manager are subsidiaries of Blackstone.

Summary of Significant Accounti

Summary of Significant Accounting Policies	3 Months Ended
	Mar. 31, 2024
Summary of Significant Accounting Policies	2. Summary of Significant Accounting Policies Basis of Presentation The accompanying unaudited condensed financial statements of BXPE U.S. have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information and the instructions to Form 10-Q. Financial Services—Investment Companies 10-K Principles of Consolidation In accordance with ASC 946, BXPE U.S. generally does not consolidate investments unless BXPE U.S. has a controlling financial interest in an investment company or operating company whose business consists of providing services to BXPE U.S. A controlling financial interest is defined as (a) the power to direct the activities of the investment company that most significantly impact the entity’s economic performance and (b) the obligation to absorb losses of the entity or the right to receive benefits from the entity that could potentially be significant to the investment company. BXPE U.S. determines whether it has a controlling financial interest in an investment company at such company’s inception and continuously reconsiders that conclusion. In instances where BXPE U.S. wholly owns another investment company, BXPE U.S. believes this would constitute a controlling interest and consolidation would be appropriate. For non-wholly BXPE U.S. does not have a controlling financial interest in, and as a result, does not consolidate the Aggregator, nor any other reporting entities within BXPE, because (a) the General Partner is not acting solely on behalf of BXPE U.S. as it carries out its duties, and (b) BXPE U.S. does not absorb essentially all of the Aggregator’s variability. At each reporting date, BXPE U.S. assesses whether it has a controlling financial interest in the Aggregator or any other reporting entities within BXPE, and any associated consolidation implications. Valuation of Investments at Fair Value BXPE U.S. has indirect exposure to gains and losses on underlying investments because it invests in the Aggregator which, in turn, holds such underlying investments through the Aggregator’s subsidiaries. Valuations of investments held by the Aggregator are disclosed in the notes to the Aggregator’s condensed consolidated financial statements. For information regarding net realized and change in unrealized gains and losses on such investments held indirectly by BXPE U.S., please see the Aggregator’s condensed consolidated financial statements included following these condensed financial statements and please see Note 3. “Investments and Fair Value Measurement” in the “Notes to Condensed Consolidated Financial Statements” of BXPE US Aggregator (CYM) L.P. for information regarding the valuation of investments. BXPE U.S. measures its investment in the Aggregator at fair value using the net asset value of the Aggregator. The net asset value of the Aggregator is considered a practical expedient that represents fair value as (a) the investment does not have a readily determinable fair value because the Aggregator’s net asset value is not published or the basis for current transactions, (b) the Aggregator is an investment company, and (c) the net asset value of the Aggregator is calculated in a manner in which all of its investments are reported at fair value as of the measurement date. Changes in the fair value of BXPE U.S.’s investment in the Aggregator are presented within Net Change in Unrealized Gains (Loss) on Investments Allocated from BXPE US Aggregator (CYM) L.P. in the Condensed Statement of Operations. Cash and Cash Equivalents Cash and Cash Equivalents represents cash on hand, cash held in banks and short-term, highly liquid investments with original maturities of three months or less. BXPE U.S. may have bank balances in excess of federally insured amounts; however, BXPE U.S. deposits its Cash and Cash Equivalents with high credit-quality institutions to minimize credit risk. Income Taxes BXPE U.S. is treated as a partnership for U.S. federal income tax purposes and therefore is not subject to any U.S. federal and state income taxes. It is possible that BXPE U.S. may be considered a publicly traded partnership and not meet the qualifying income exception in certain years. In such a scenario, BXPE U.S. would be treated as a publicly traded partnership taxed as a corporation, rather than a partnership. The members of BXPE U.S. would be treated as shareholders in a corporation, and BXPE U.S. itself would become taxable as a corporation for U.S. federal, state and/or local income tax purposes. BXPE U.S. would be required to pay income tax at corporate rates on its net taxable income.
BXPE US Aggregator (CYM) L.P [Member]
Summary of Significant Accounting Policies	2. Summary of Significant Accounting Policies Basis of Presentation The accompanying unaudited condensed consolidated financial statements of the Aggregator have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”). The Aggregator is considered an investment company under GAAP and follows the accounting and reporting guidance applicable to investment companies in the Financial Accounting Standards Board Accounting Standards Codification (“ASC”) Topic 946, Financial Services—Investment Companies Principles of Consolidation In accordance with ASC 946, the Aggregator generally does not consolidate its investment in a company unless the Aggregator has a controlling financial interest in an investment company or operating company whose business consists of providing services to the Aggregator. Accordingly, the Aggregator consolidates wholly owned investment company subsidiaries. All intercompany balances and transactions have been eliminated in consolidation. Fair Value of Investments and Financial Instruments ASC 820-10, Fair Value Measurement Investments measured and reported at fair value are classified and disclosed in one of the following categories: ● Level I – Quoted prices are available in active markets for identical investments as of the reporting date. The type of investments included in Level I are publicly-traded securities in an active market. The Aggregator does not adjust the quoted price for these investments (to the extent it holds them) even in situations where the Aggregator holds a large position and a sale could reasonably impact the quoted price. ● Level II – Pricing inputs are other than quoted prices in active markets, which are either directly or indirectly observable as of the reporting date, and fair value is determined through the use of models or other valuation methodologies. The types of investments that would generally be included in this category include publicly-traded securities with restrictions on disposition, and certain convertible securities. ● Level III – Pricing inputs are unobservable and include situations where there is little, if any, market activity for the investment. Fair value for these investments is determined using valuation methodologies that consider a range of factors, including but not limited to, the price at which the investment was acquired, the nature of the investment, local market conditions, valuations for comparable companies, current and projected operating performance and financing transactions subsequent to the acquisition of the investment. The inputs into the determination of fair value require significant judgment. Due to the inherent uncertainty of these estimates, these values may differ materially from the values that would have been used had a ready market for these investments existed. Investments that are included in this category generally are privately-held debt, equity and certain convertible securities. In certain cases the inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, an investment’s level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement. The Investment Manager’s assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment, and considers factors specific to the investment. Investments at Fair Value and Investments in Affiliated Investee Funds Investments at Fair Value The Aggregator values its investments at fair value in accordance with ASC 820. Fair value is the amount that would be received to sell an asset or paid to transfer a liability, in an orderly transaction between market participants at the measurement date. In the absence of observable market prices, the Aggregator’s investments are valued using valuation methodologies applied on a consistent basis as described below. Additional information regarding these investments is provided in Note 3. “Investments and Fair Value Measurement.” The Aggregator’s determination of fair value is based on the best information available in the circumstances and incorporates the Aggregator’s own assumptions, including assumptions that the Aggregator believes market participants would use in valuing the investments, and involves a significant degree of judgment, taking into consideration a combination of internal and external factors, including appropriate risk adjustments for non-performance Under the income approach, which is generally the Aggregator’s primary valuation approach, fair value is determined by converting future amounts, such as cash flows or earnings, discounted to a single present amount using current market expectations about those future amounts. In determining fair value under this approach, the Aggregator makes assumptions over a projection period regarding unobservable inputs such as revenues, operating income, capital expenditures, income taxes, working capital needs and the terminal value and exit multiple of the investee company, among other things. The Aggregator discounts those projected cash flows by deriving a discount rate based on a capital structure similar to that of a market participant using observable inputs such as the rate of return available in the market on an investment free of default risk, an equity risk premium to reflect the additional risk of a market portfolio of equity instruments over risk free instruments, beta as a measure of risk based on share price correlation to the market, and equity and debt-to-capital Under the market approach, which is generally the Aggregator’s secondary valuation approach, fair value may be determined by reference to a recent transaction involving the investment or by reference to observable valuation measures for companies or assets that are determined by the Aggregator to be comparable, such as multiplying a key performance metric of the investee company, such as earnings before interest and taxes or other performance metric, by a relevant valuation multiple observed in the range of comparable companies or transactions, adjusted by the Aggregator for differences between the investment and the referenced comparables. Observable inputs used in the market approach to derive a valuation multiple may include the public prices for securities issued by, and the relevant performance metrics of, companies deemed comparable to the investee company, and/or transaction prices involving significant equity interests in companies deemed comparable to the investee company. Unobservable inputs used in the market approach may include the key performance metric of the investee company, such as earnings before interest, taxes, depreciation and amortization (“EBITDA”). Investments may also be valued at their acquisition price for a period of time after an acquisition as the best measure of fair value in the absence of any conditions or circumstances that would indicate otherwise. In the event of an announced sale of investments with a definitive agreement in place, investments may also be valued using a discount-to-sale break-up Investments in debt securities that are not listed on an exchange, but for which external pricing sources, such as dealer quotes or independent pricing services may be available, are valued by the Aggregator after considering, among other factors, such external pricing sources, recent trading activity or market transactions of similar securities adjusted for security specific factors such as relative capital structure priority and interest and yield risks. Publicly-traded investments in active markets are reported at the market closing price, less a discount, as appropriate, as determined by the Aggregator to reflect restrictions on disposition where such restrictions are an attribute of the investment. Convertible preferred investments may be valued using an option pricing model based on the specific terms of the security, including but not limited to, the publicly-traded share price of the common shares or units in active markets as of the reporting date, preferred-in-kind Investments in Affiliated or Unaffiliated Investee Funds Investments in affiliated or unaffiliated investee funds (“Investee Funds”) are generally valued using the reported net asset value (“NAV” or “Net Asset Value”) of the Investee Funds as a practical expedient for fair value. The Aggregator may, as a practical expedient, estimate the fair value of an Investee Fund based on NAV if the reported NAV of the Investee Fund is calculated in a manner consistent with the measurement principles applied to investment companies and the Aggregator has internal processes to independently evaluate the fair value measurement process utilized by the underlying Investee Fund to calculate the Investee Fund’s NAV, both of which are in accordance with ASC 946. Such internal processes include the evaluation of the Investee Fund’s own process and related internal controls in place to estimate the fair value of its underlying investments that are included in the NAV calculation, performing ongoing operational due diligence, review of the Investee Fund’s financial statements and ongoing monitoring of other relevant qualitative and quantitative factors. If the Aggregator determines, based on its own due diligence and investment monitoring procedures, that NAV does not represent fair value or if the investee fund is not an investment company, such as a collateralized loan obligation (“CLO”) vehicle, the Aggregator will estimate the fair value in good faith and in a manner that it reasonably chooses, in accordance with its valuation policies. Cash and Cash Equivalents Cash and Cash Equivalents represents cash on hand, cash held in banks, money market funds, Treasury Bills and short-term, highly liquid investments with original maturities of three months or less. Interest income from Cash and Cash Equivalents is recorded in Interest Income in the Condensed Consolidated Statement of Operations. The Aggregator may have bank balances in excess of federally insured amounts; however, the Aggregator deposits its Cash and Cash Equivalents with high credit-quality institutions to minimize credit risk. Performance Participation Allocation, Administration Fee and Management Fee Payables For more information regarding these payables reported on the Condensed Consolidated Statements of Assets and Liabilities, see Note 5. “Related Party Transactions.” Foreign Currency In the normal course of business, the Aggregator makes investments outside the United States (“U.S.”) through subsidiaries with a non-U.S. Non-U.S. non-U.S. Net Realized and Unrealized Gain (Loss) on Investments The Aggregator recognizes net realized gains (losses) on investments when earned at the time of receipt of proceeds. Without regard to unrealized gains or losses previously recognized, realized gains or losses will be measured as the difference between the net proceeds from the sale, repayment or disposal of an asset and the adjusted cost basis of the asset. Net Change in Unrealized Gain (Loss) on Investments is the change in fair value of its underlying investments. Net change in unrealized gains or losses will reflect the change in investment values during the reporting period, including any reversal of previously recorded unrealized gains or losses when gains or losses are realized. Income Recognition The Aggregator recognizes interest income from private investments when earned pursuant to the terms of the respective investment. The Aggregator recognizes dividend income from publicly-traded securities on the ex-dividend Organizational and Offering Expenses Prior to BXPE U.S. and the Feeder first accepting third party investors and commencing investment operations on January 2, 2024, organizational and offering expenses were paid by the Investment Manager. After BXPE U.S. and the Feeder accepted third party investors and commenced investment operations, costs associated with the organization of BXPE were expensed. Costs associated with the offering of BXPE U.S. and the Feeder are capitalized as a deferred expense and included as an asset on the Condensed Consolidated Statements of Assets and Liabilities and amortized over a 12 month period from January 2, 2024. Organization and offering expenses are born by the Aggregator since the expenses benefit all investors that invest through the Feeder, BXPE U.S. or any Parallel Fund. Organizational expenses are reported in Organizational Expenses and offering Management Fees Waived The Investment Manager has agreed to waive the Management Fee (as defined in Note 5. “Related Party Transactions”) for the first six months following the date on which BXPE U.S. and the Feeder first accepted third party investors and commenced investment operations on January 2, 2024. The Investment Manager has the right to extend the Management Fee waiver at its discretion. The waived Management Fees are reported in Management Fees Waived on the Condensed Consolidated Statements of Operations. Refer to Note 5. “Related Party Transactions” for more information. Expense Support The Investment Manager voluntarily agreed to pay certain expenses on behalf of BXPE such that the total expenses borne by BXPE (excluding interest expense, organization and offering expense, servicing fees, the Performance Participation Allocation (as defined in Note 5. “Related Party Transactions”) and taxes) do not exceed a certain threshold. The amount of expenses the Investment Manager has agreed to pay pursuant to this arrangement are reported in Expense Support on the Condensed Consolidated Statements of Operations and reported in Accounts Receivable on the Condensed Consolidated Statements of Assets and Liabilities. Refer to Note 5. “Related Party Transactions” for more information. Income Taxes The Aggregator is treated as a partnership for income tax purposes and is not directly subject to income taxes. It is possible that the Aggregator may be considered a publicly traded partnership and not meet the qualifying income exception in certain years. In such a scenario, the Aggregator would be treated as a publicly traded partnership taxed as a corporation, rather than a partnership. The members of the Aggregator would be treated as shareholders in a corporation, and the Aggregator itself would become taxable as a corporation for U.S. federal, state and/or local income tax purposes. The Aggregator would be required to pay income tax at corporate rates on its net taxable income. Additionally, the Aggregator owns a controlling interest in several subsidiaries that are treated as corporations for U.S. and non-U.S. Recent Accounting Pronouncements In June 2022, the Financial Accounting Standards Board issued amended guidance on the accounting for Fair Value Measurement of Equity Securities Subject to Contractual Sale Restrictions. The guidance requires that reporting entities not consider contractual sale restrictions that prohibit the sale of equity securities when measuring fair value and introduces new disclosure requirements for equity securities subject to contractual sale restrictions. The Aggregator will adopt the amended guidance on January 1, 2025. Upon adoption, the Aggregator does not expect a significant impact on the condensed consolidated financial statements or any measurement impacts, but will update disclosures to comply with the new requirements.

Investment in the Aggregator

Investment in the Aggregator	3 Months Ended
	Mar. 31, 2024
Investment In The Aggregator [Abstract]
Investment in the Aggregator	3. Investment in the Aggregator BXPE U.S. recognizes dividend income when earned at the time of receipt of proceeds from the Aggregator. BXPE U.S. has an interest of 76.7% in the Aggregator as of March 31, 2024. The remaining interest in the Aggregator is held by a Parallel Fund.

Line of Credit Agreement

Line of Credit Agreement	3 Months Ended
	Mar. 31, 2024
Debt Disclosure [Abstract]
Line of Credit Agreement	4. Line of Credit Agreement On November 3, 2023, BXPE U.S. and BXPE Lux (the “Borrowers”) entered into an amended and restated unsecured, uncommitted line of credit agreement (“A&R Line of Credit”) with Blackstone Holdings Finance Co. L.L.C. (“Finco”) providing up to a maximum amount of $300.0 million. The A&R Line of Credit expires on November 2, 2024, subject to one year extension options requiring Finco approval. Under the A&R Line of Credit, the interest rate on the unpaid balance of the principal balance amount of each loan is the then-current borrowing rate offered by a third party lender, or, if no such rate is available, the applicable Secured Overnight Financing Rate (“SOFR”) plus 3.00%. Each advance under the A&R Line of Credit is repayable on the earliest of (a) the expiration of the A&R Line of Credit, (b) Finco’s demand and (c) the date on which the Investment Manager no longer acts as investment manager to the Borrowers, provided that the Borrowers will have 180 days to make such repayment in the cases of clauses (a) and (b) and 45 days to make such repayment in the case of clause (c). To the extent the Borrowers have not repaid all loans and other obligations under the A&R Line of Credit after a repayment event has occurred, the Borrowers are obligated to apply the net cash proceeds from its offering and any sale or other disposition of assets to the repayment of such loans and other obligations; provided that the Borrowers will be permitted to (a) make distributions to avoid any entity level tax, (b) make payments to fulfill any repurchase requests of the Borrowers pursuant to any established unit repurchase plans, (c) use funds to close any investment which the Borrowers committed to prior to receiving a demand notice and (d) make distributions to its unitholders (“Unitholders”) or shareholders at per unit or per share levels consistent with the immediately preceding fiscal quarter. The A&R Line of Credit also permits voluntary pre-payment

Investments and Fair Value Meas

Investments and Fair Value Measurement	3 Months Ended
	Mar. 31, 2024
BXPE US Aggregator (CYM) L.P [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments and Fair Value Measurement	3. Investments and Fair Value Measurement The following table summarizes the valuation of the Aggregator’s investments by the fair value hierarchy levels as of March 31, 2024: March 31, 2024 Level I Level II Level III NAV Total Assets Cash and Cash Equivalents Cash Held at Banks  $ 30,861  $ —  $ —  $ —  $ 30,861 Money Market Fund 138,988   —   —   —   138,988   Short Term Investments — 399,233 — — 399,233 Total Cash and Cash Equivalents 169,849 399,233 — — 569,082 Investments Portfolio Companies — — 666,449 — 666,449 Debt Securities — 858,792 1,409 — 860,201 Total Investments — 858,792 667,858 — 1,526,650 Investments in Affiliated Investee Funds — — 86,476 517,236 603,712  $ 169,849  $ 1,258,025  $ 754,334  $ 517,236  $ 2,699,444 The following table summarizes the quantitative inputs and assumptions used for valuation of investments categorized in Level III of the fair value hierarchy as of March 31, 2024: Fair Value Valuation Techniques Unobservable Inputs Ranges Weighted- Impact to Financial Assets Investments Portfolio Companies  $ 405,448 Discounted Cash Flows WACC 7.9% - 22.8% 17.3% Lower NOI Capital Exit Rate 6.3% 6.3% Lower Exit Multiple 11.2x - 22.0x 18.0x Higher 261,001   Transactional Value n/a Debt Securities 1,409 Market Quotations Total Investments 667,858 Investments in Affiliated Investee Funds 86,476 Discounted Cash Flows WACC 17.5% - 18.5% 18.0% Lower  $ 754,334 n/a Not applicable. WACC Weighted Average Cost of Capital. NOI Capital Exit Rate  Net Operating Income Capital Exit Rate. Exit Multiple Ranges include the last twelve months EBITDA multiples and the next twelve months forward EBITDA multiples. Market Quotations Broker quoted prices provided by independent pricing services. For the three months ended March 31, 2024, the following table presents changes in the fair value of investments for which Level III inputs were used to determine the fair value: Level III Financial Assets at Fair Value Three Months Ended March 31, 2024 Affiliated Portfolio Debt Investee Companies Securities Funds Total Balance, Beginning of Period  $ —  $ —  $ —  $ — Purchases 657,094 1,400 84,040 742,534 Net Change in Unrealized Gain (Loss) on Investments 11,309   9   2,436   13,754   Net Change in Unrealized Gain (Loss) on Translation of Assets and Liabilities in Foreign Currencies (1,954 ) — — (1,954 ) Balance, End of Period  $ 666,449  $ 1,409  $ 86,476  $ 754,334 Changes in Unrealized Gains (Losses) Included in Earnings Related to Financial Assets Still Held at the Reporting Date  $ 9,355  $ 9  $ 2,436  $ 11,800 There were no transfers of investments into or out of Level III of the fair value hierarchy during the three months ended March 31, 2024. Investments in Investee Funds The following table summarizes Investments in Affiliated Investee Funds, by investment strategy, the unfunded commitment of each strategy (if applicable) and the fair value of the investments in the affiliated Investee Funds. As of March 31, 2024, none of these investments may be redeemed at or within three months of the reporting date. The Aggregator may receive distributions resulting from income and/or sales of underlying assets; however, an estimate of the period of time over which the underlying assets are expected to be liquidated by the Investee Funds cannot be made. Investments in Investee Funds by Strategy Unfunded Fair Value Private Equity Strategic Partners IX Investments - B L.P.  $ 24,125    $ 2,215    SP Tortuga Acquisitions L.P. 25,400 24,600  49,525 26,815  Credit Blackstone Credit Rated Fund Trust LP 86,602 17,295  Captree Park CLO, Ltd. — 357,096  Peebles Park CLO, Ltd. — 46,485  Bayswater Park CLO, Ltd. — 39,992  BSOF SRT Parallel Onshore Fund L.P. — 71,421  BSOF Parallel Onshore Fund L.P. — 44,608  86,602 576,897   $ 136,127  $ 603,712  The General Partner may, as a practical expedient, estimate the fair value of an Investee Fund based on NAV if the reported NAV of the Investee Fund is calculated in a manner consistent with the measurement principles applied to investment companies, in accordance with ASC 946, and the General Partner has internal processes to independently evaluate the fair value measurement process utilized by the underlying Investee Fund to calculate the Investee Fund’s NAV in accordance with ASC 946. The net change in unrealized gains (losses) on investments in affiliated Investee Funds is $10.2 million for the three months ended March 31, 2024. Net realized gains (losses) on investments in affiliated Investee Funds was less than $0.1 million for the three months ended March 31, 2024. Refer to Note 5. “Related Party Transactions” for more detail on investments in affiliated Investee Funds.

Net Assets

Net Assets	3 Months Ended
	Mar. 31, 2024
Net Asset [Line Items]
Net Assets	5. Net Assets BXPE U.S., at the direction of the General Partner, has the authority to issue an unlimited number of Units of each Unit Class (as defined below) . BXPE U.S. offers three classes of limited partnership Units: Class S, Class D and Class I Units (each a “Unit Class” or a “Class”) per Unit plus applicable subscription fees that are paid by the Unitholder outside its investment in BXPE U.S. and not reflected in BXPE U.S.’s Transactional NAV. The Transactional NAV for each Unit Class was first determined as of the end of the first full month after BXPE U.S. accepted third party investors and commenced investment operations, which was in January 2024. Thereafter, the Transactional NAV is based on the month-end Unit issuances related to monthly subscriptions are effective the first calendar day of each month. Units are issued at a price per Unit equivalent to BXPE U.S.’s most recent Transactional NAV per Unit available for each Class, which is BXPE U.S.’s prior month-end Transactional NAV per Unit. The following table provides a summary of the Units issued during the three months ended March 31, 2024 and 2023: Class S Units Class D Units Class I Units Total Units Outstanding as of December 31, 2022 and March 31, 2023 — — 4,000 4,000 Units Outstanding as of December 31, 2023 — — 4,000 4,000  Units Issued During the Period 32,272,800 1,616,129 43,429,515 77,318,444 Units Outstanding as of March 31, 2024  32,272,800  1,616,129  43,433,515  77,322,444 Repurchase Program At the discretion of the General Partner, BXPE U.S. has implemented a repurchase program (the “Repurchase Program”) in which it offers to repurchase in each quarter up to 3 % of Units outstanding as of the close of the previous calendar quarter. BXPE U.S. conducts such repurchase offers in accordance with the requirements of Rule 13e-4 Under the Repurchase Program, to the extent BXPE U.S. offers to repurchase Units in any particular quarter, BXPE U.S. expects to repurchase Units using a purchase price equal to BXPE U.S.’s Transactional NAV per Unit as of the last calendar day of the applicable quarter (the “Repurchase Date”), subject to the Early Repurchase Deduction (as defined below). Any repurchase requests of Units that have not been outstanding for at least two years will be subject to an early repurchase deduction equal to 5 % of the value of BXPE U.S.’s Transactional NAV of the Units being repurchased (calculated as of the Repurchase Date) (the “Early Repurchase Deduction”) for the benefit of BXPE U.S. and its Unitholders. BXPE U.S. commenced its first offering pursuant to the Repurchase Program on April 1, 2024. submitted within the April offering period.
BXPE US Aggregator (CYM) L.P [Member]
Net Asset [Line Items]
Net Assets	4. Net Assets The Aggregator, at the direction of the General Partner, has the authority to issue an unlimited number of Class A Units and Class B Units. No Class B Units have been issued by the Aggregator since inception. As of March 31, 2024, the Aggregator has two limited partners, BXPE U.S. and a Parallel Fund. Class A Units are issued to both the BXPE U.S. limited partner and the Parallel Fund limited partner. BXPE U.S. and the Parallel Fund receive monthly subscriptions from their investors, which are in turn invested into the Aggregator. BXPE U.S. and the Parallel Fund are issued Class A Units in exchange for their contributions to the Aggregator. The term “Transactional NAV” refers to the price at which transactions in the Aggregator’s Units are made, calculated in accordance with a valuation policy that has been approved by the Board of Directors. The purchase price per Aggregator Unit of each limited partner is equal to the Transactional NAV per Unit for such limited partner as of the last calendar day of the immediately preceding month. Before the Aggregator determined its first Transactional NAV, the initial purchase price for the Aggregator’s Units was $ 25.00 per unit. Transactional NAV was first determined as of the end of the first full month after BXPE U.S. and the Feeder had accepted third party investors and commenced investment operations, which was on January 2, 2024. Thereafter, the Transactional NAV is based on the month-end values of investments, the addition of the value of any other assets such as cash and the deduction of any liabilities, including the accrual and allocation of the Management Fee, Administration Fee and the Performance Participation Allocation (each as defined below) and the deduction of expenses. Unit issuances related to monthly contributions are effective the first calendar day of each month. Units are issued at a price per Unit equivalent to the Aggregator’s most recent Transactional NAV per Unit available for Class A Units, which is the Aggregator’s prior month-end The following table provides a summary of the Units issued during the three months ended March 31, 2024 and 2023. Class A Units Total Units Outstanding as of December 31, 2022 and March 31, 2023 — — Units Outstanding as of December 31, 2023 — — Units Issued During the Period 100,725,569   100,725,569   Units Outstanding as of March 31, 2024 100,725,569 100,725,569 In accordance with the Aggregator Partnership Agreement, the General Partner can cause the Aggregator to offer to repurchase Units from limited partners to match any repurchase offers made by BXPE U.S. and any Parallel Fund. Any repurchase of Units will be effected by the Aggregator as needed to comply with the Repurchase Program of BXPE U.S. and any Parallel Fund and otherwise as determined by the General Partner. A Parallel Fund may withdraw entirely from the Aggregator and have all of its Units repurchased by the Aggregator only with the consent of BXPE U.S., including, if applicable, approval by the Board of Directors.

Related Party Transactions

Related Party Transactions	3 Months Ended
	Mar. 31, 2024
Related Party Transactions	6. Related Party Transactions Partnership Agreement BXPE U.S. has entered into a limited partnership agreement, as amended and restated (the “ BXPE U.S. Performance Participation Allocation The General Partner receives a performance participation allocation (“Performance Participation Allocation”) by BXPE U.S. (indirectly through ). Investment Management Agreement BXPE U.S. has entered into an investment management agreement with the Investment Manager (the “Investment Management Agreement”). As part of carrying out its investment management services, the Investment Manager may enter into sub-advisory, sub-advisory Management Fee In consideration for its investment management services, BXPE U.S. (indirectly through the Aggregator) will pay the Investment Manager a management fee (the “Management Fee”). Investors in the Feeder, BXPE U.S. and Parallel Funds will indirectly bear a portion of the Management Fee paid by the Aggregator (indirectly through the Aggregator’s consolidated subsidiaries), but such expenses will not be duplicated at the Feeder, BXPE U.S. or Parallel Funds. For the three months ended March 31, 2024, BXPE U.S. was allocated $5.1 million of the gross Management Fee recognized by the Aggregator, which was fully waived by the Investment Manager. The Investment Manager has agreed to waive the Management Fee for the first six months following the date on which BXPE U.S. first accepted third party investors and commenced investment operations, which was January 2, 2024. The Investment Manager has the right to extend the Management Fee waiver at its discretion. Please refer to the Aggregator’s condensed consolidated financial statements included following these condensed financial statements for more information regarding the Management Fee. Blackstone Capital Markets (“BXCM”), a subsidiary of Blackstone, provides transaction-related capital markets services to investments of BXPE. To the extent BXCM receives a fee in exchange for such services, the Investment Manager may agree to waive a portion of the Management Fee payable. For the three months ended March 31, 2024, there were no offsets issued in connection with portfolio transaction-related capital markets services. For the three months ended March 31, 2024, BXCM received $0.2 million of transaction fees from acquisitions closed within BXPE which may be utilized for Management Fee offsets in future periods. Administration Fee The Investment Manager provides administration services to BXPE, consistent with the BXPE U.S. Dealer Manager Agreement BXPE U.S. and the Feeder entered into a Dealer Manager Agreement (the “Dealer Manager Agreement”) with Blackstone Securities Partners L.P. (the “Dealer Manager”), a broker-dealer registered with the SEC under the Exchange Act and a member of the Financial Industry Regulatory Authority. Pursuant to the Dealer Manager Agreement, the Dealer Manager manages BXPE U.S.’s relationships with third party brokers engaged by the Dealer Manager to participate in the distribution of Units, which are referred to as participating brokers, and financial advisors. The Dealer Manager also coordinates BXPE U.S.’s marketing and distribution efforts with participating brokers and their registered representatives with respect to communications related to the terms of BXPE U.S.’s offering, its investment strategies, material aspects of its operations and subscription procedures. The Dealer Manager is entitled to receive Unitholder servicing fees monthly in arrears at an annual rate of 0.85 % of the value of BXPE U.S.’s Transactional NAV attributable to Class S Units as of the last day of each month. The Dealer Manager is entitled to receive Unitholder servicing fees monthly in arrears at an annual rate of 0.25 % of the value of BXPE U.S.’s Transactional NAV attributable to Class D Units as of the last day of each month. In calculating the servicing fees, BXPE U.S. uses the Transactional NAV before giving effect to any accruals for the servicing fees, repurchases, if any, for that month and distributions payable on BXPE U.S.’s Units. There will not be Unitholder servicing fees with respect to Class I Units. The Unitholder servicing fees are payable to the Dealer Manager, but the Dealer Manager anticipates that all or a portion of such fees will be retained by, or reallowed (paid) to, participating brokers or other financial intermediaries. BXPE U.S. accrues the cost of the servicing fees, as applicable, for the estimated life of the Units as an offering cost at the time Class S and Class D Units are sold. Accrued servicing fees as of March 31, 2024 are $54.5 million and $0.8 million for Class S and Class D, respectively. Line of Credit and Warehousing Agreements The Borrowers entered into the A&R Line of Credit with Finco. BXPE U.S., BXPE Lux and the Investment Manager, in its capacity as Investment Manager, on behalf of and not for its own account, of (a) BXPE U.S. and (b) BXPE Lux (together with their respective parallel funds) entered into an Amended and Restated Warehousing Agreement (the “A&R Warehousing Agreement”) with Finco in connection with the launch and ramp up of the BXPE Fund Program. For additional information, see Note 4. “Line of Credit Agreement” and Note 8. “Warehousing Agreement.” Due to Affiliates Due to Affiliates is comprised of cash advances made by Finco on behalf of BXPE U.S. for the payment of fund expenses. These amounts are intended to be cash reimbursed by BXPE U.S. and are non-interest BXPE Lux BXPE invests alongside BXPE Lux, a Luxembourg alternative investment fund available to individual investors primarily domiciled in countries of the European Economic Area, the United Kingdom, Switzerland, Asia and certain other jurisdictions. While BXPE and BXPE Lux have substantially similar investment objectives and strategies and are expected to have highly overlapping investment portfolios, BXPE and BXPE Lux operated as distinct investment structures. Affiliates The General Partner, Investment Manager, Dealer Manager, the Feeder, Parallel Funds, the Aggregator and BXPE Lux are affiliates of BXPE U.S.
BXPE US Aggregator CYM L P [Member]
Related Party Transactions	5. Related Party Transactions Partnership Agreement The Aggregator has entered into the Aggregator Partnership Agreement with the General Partner. Under the terms of the Aggregator Partnership Agreement, overall responsibility for the Aggregator rests with the General Partner. The General Partner has delegated BXPE’s portfolio management function to the Investment Manager on January 2, 2024. Performance Participation Allocation The General Partner receives a performance participation allocation (“Performance Participation Allocation”) by BXPE U.S. (indirectly through the Aggregator ) equal to % of total return subject to a % annual hurdle amount and a high water mark with % catch-up. Such allocation is measured on a calendar year basis, paid quarterly, accrued monthly (subject to pro-rating for partial periods), and without taking into account accrued and unpaid taxes of any intermediate entity through which BXPE indirectly invests in an investment or taxes paid by any such intermediate entity during the applicable month. For the first calendar year of BXPE’s operations, the allocation is paid at the end of such first calendar year, and thereafter, the allocation will be paid quarterly. The General Partner may elect to receive the Performance Participation Allocation in cash, Units and/or shares or units of intermediate entities. If the Performance Participation Allocation is paid in Units, such Units may be repurchased at the General Partner’s request and will be subject to certain limitations. For the three months ended March 31, 2024, the Aggregator accrued unrealized Performance Participation Allocation of $ million. The amount of unrealized Performance Participation Allocation accrued is as if BXPE had been liquidated at its net asset value at that date and at that time, if any, will be paid or realized to the General Partner. The unrealized Performance Participation Allocation is subject to the future performance of BXPE throughout the Performance Participation Allocation period of each limited partner. Investment Management Agreement On January 2, 2024, BXPE U.S. entered into an investment management agreement with the Investment Manager (the “Investment Management Agreement”). As part of carrying out its investment management services (including structuring investments through the Aggregator), the Investment Manager has entered into, and may enter into additional sub-advisory, or other similar arrangements, with other advisory subsidiaries of Blackstone. These sub-advisory relationships do not affect the terms of the Investment Management Agreement. Management Fee In consideration for its investment management services, the Aggregator , on behalf of its limited partners , will pay the Investment Manager a management fee (the “Management Fee”) equal to % of the Aggregator’s Transactional NAV per year payable monthly, before giving effect to any accruals for the Management Fee, servicing fees related to BXPE U.S.’s and the Feeder’s Class S/S-TE and Class D/D-TE Units, Administration Fee (as defined below), Performance Participation Allocation, pending unit repurchases, any distributions and without taking into account accrued and unpaid taxes of any intermediate entity through which the Aggregator indirectly invests in an investment or taxes paid by any such intermediate entity during the applicable month. The Investment Manager may elect to receive the Management Fee in cash, Units and/or shares or units of intermediate entities. If the Management Fee is paid in Units, such Units may be repurchased at the Investment Manager’s request and will be subject to certain limitations. Additionally, the Investment Manager may separately elect for the Management Fee to be paid (in whole or in part) to an affiliate of the Investment Manager in satisfaction of Management Fee amounts owed to the Investment Manager in connection with services provided by such affiliate to BXPE and/or any intermediate entity. The Investment Manager has agreed to waive the Management Fee for the first six months following the date on which BXPE U.S. and the Feeder first accepts third For the three months ended March 31, 2024, the Aggregator accrued Management Fees of $ million of which the Investment Manager waived all $ million. The waived Management Fees are reported in Management Fees Waived on the Condensed Consolidated Statements of Operations. Administration Fee The Investment Manager and its affiliates provide administration services to BXPE, consistent with the Aggregator Partnership Agreement and Investment Management Agreement. In consideration for its administrative services, the Investment Manager is entitled to receive an administration fee (the “Administration Fee”) payable by the Aggregator, equal to, in the aggregate, % of Aggregator’s Transactional NAV per annum payable monthly, before giving effect to any accruals for the Management Fee, the servicing fee, Administration Fee and the Performance Participation Allocation, pending Unit repurchases, any distributions and without taking into account accrued and unpaid taxes of any intermediate entity through which BXPE indirectly invests in an investment or taxes paid by any such intermediate entity during the applicable month. For the three months ended March 31, 2024, the Aggregator accrued Administration Fees of $ million. Investments in Affiliated Investee Funds The Aggregator has investments in certain Blackstone-affiliated investment funds (“Investments in Affiliated Investee Funds”). As of March 31, 2024, the Aggregator had Investments in Affiliated Investee Funds of $ million. Please refer to Note 2. “Summary of Significant Accounting Policies” for more information on Investments in Affiliated Investee Funds. Expense Support For the three months ended March 31, 2024, the Investment Manager voluntarily agreed to pay certain expenses on behalf of BXPE such that the total expenses borne by BXPE (excluding interest expense, organization and offering expense, servicing fees, the Performance Participation Allocation and taxes) did not exceed an annualized rate of 0.50% of BXPE’s NAV. For the three months ended March 31, 2024, the Aggregator accrued Expense Support of $ 0.2 million that will be paid by the Investment Manager. No fees were charged to the Investment Manager for agreeing to bear these expenses and the Investment Manager will not be reimbursed by the Aggregator. 35 Due to Affiliates Due to Affiliates is comprised of cash advances made by Blackstone Holdings Finance Co. L.L.C. (“Finco”), a subsidiary of Blackstone, on behalf of the Aggregator for the payment of fund expenses. These amounts are intended to be cash reimbursed by the Aggregator and are non-interest BXPE Lux BXPE invests alongside BXPE Lux, a Luxembourg alternative investment fund available to individual investors primarily domiciled in countries of the European Economic Area, the United Kingdom, Switzerland, Asia and certain other jurisdictions. While BXPE and BXPE Lux have substantially similar investment objectives and strategies and are expected to have highly overlapping investment portfolios, BXPE and BXPE Lux are operated as distinct investment structures. Affiliates The General Partner, Investment Manager, Blackstone Securities Partners L.P. (the “Dealer Manager”), BXPE U.S., the Feeder, Parallel Funds and BXPE Lux are affiliates of the Aggregator.

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2024
Commitments And Contingencies Disclosure [Line Items]
Commitments and Contingencies	7. Commitments and Contingencies Commitments For information regarding investment commitments, see the Aggregator’s condensed consolidated financial statements. To the extent funded, these investments are expected to reside at the Aggregator but may be funded from BXPE U.S.’s available liquidity, including proceeds from the issuance of Units by BXPE U.S. and available borrowing capacity under the A&R Line of Credit. For information regarding the A&R Line of Credit, see Note 4. “Line of Credit Agreement.” 15 Contingencies BXPE U.S. may, from time to time, be party to various legal matters arising in the ordinary course of business, including claims and litigation proceedings. As of March 31, 2024, BXPE U.S. was not subject to any material litigation nor was BXPE U.S. aware of any material litigation threatened against it. Indemnifications In the normal course of business, BXPE U.S. enters into contracts that contain a variety of indemnification arrangements. BXPE U.S.’s exposure under these arrangements, if any, cannot be quantified. However, BXPE U.S. has not had any claims or losses pursuant to these indemnification arrangements and expects the potential for a material loss to be remote.
BXPE US Aggregator (CYM) L.P [Member]
Commitments And Contingencies Disclosure [Line Items]
Commitments and Contingencies	6. Commitments and Contingencies Commitments The Investment Manager agreed to advance organizational and offering expenses, other than subscription fees and servicing fees related to Class S/S-TE Class D/D-TE As of March 31, 2024, the Aggregator had unfunded commitments to existing investments of $304.2 million and the BXPE Fund Program had conditional commitments of $647.9 million to new investments. Conditional commitments are held among the BXPE Fund Program and BXPE’s allocation will be determined at closing. Conditional commitments are subject to certain terms and conditions prior to closing of the relevant transactions and there can be no assurance that such transactions will close as expected or at all. Contingencies The Aggregator may, from time to time, be party to various legal matters arising in the ordinary course of business, including claims and litigation proceedings. As of March 31, 2024, the Aggregator was not subject to any material litigation nor was the Aggregator aware of any material litigation threatened against it. Indemnifications In the normal course of business, the Aggregator enters into contracts that contain a variety of indemnification arrangements. The Aggregator’s exposure under these arrangements, if any, cannot be quantified. However, the Aggregator has not had any claims or losses pursuant to these indemnification arrangements and expects the potential for a material loss to be remote.

Income Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2024
BXPE US Aggregator CYM L P [Member]
Income Tax Examination [Line Items]
Income Taxes	7. Income Taxes For the three months ended March 31, 2024, the Aggregator Corporations estimated current and deferred taxes of $0.3 million, at an effective tax rate of 26.5%.

Warehousing Agreement

Warehousing Agreement	3 Months Ended
	Mar. 31, 2024
Warehousing Agreement [Abstract]
Warehousing Agreement	8. Warehousing Agreement On November 3, 2023, BXPE U.S., BXPE Lux and the Investment Manager entered into the A&R Warehousing Agreement with Finco. Under the A&R Warehousing Agreement, in connection with the launch and ramp of the BXPE Fund Program, Finco and its affiliates agreed to acquire certain investments that were approved by the Investment Manager and the BXPE Investment Committee up to an aggregate invested equity amount of $500.0 million (or such higher amount as is agreed between the parties), subject in each case, to Finco’s approval at the time of acquisition (each, an “Approved Warehoused Investment”). Finco agreed to subsequently transfer each Approved Warehoused Investment to the Aggregator and BXPE Lux, and the Aggregator and BXPE Lux agreed to acquire such investments from Finco (each such date, a “Warehouse Closing Date”) at a price equal to the cost of such Approved Warehoused Investment paid by Finco plus an amount equal to an annualized rate of 5% (or such lower amount as is agreed between the parties) measured over the period from the date the Approved Warehoused Investment was acquired by Finco to the applicable Warehouse Closing Date. The Investment Manager determined in its sole discretion which and what portions of Approved Warehoused Investments that Aggregator and BXPE Lux acquired on each Warehouse Closing Date. Finco will continue to provide committed funding for Approved Warehoused Investments until the applicable Warehouse Closing Date, unless extended by the mutual agreement of the parties. The term of the A&R Warehousing Agreement shall be through November 2, 2024 (one year), unless extended by the mutual agreement of the parties. The first and only Warehouse Closing Date occurred on January 2, 2024 when BXPE U.S. acquired 11 investments and commitments from Finco and its affiliates at cost. Finco agreed to waive the 5% fee fee

Financial Highlights

Financial Highlights	3 Months Ended
	Mar. 31, 2024
Investment Company, Financial Highlights [Line Items]
Financial Highlights	9. Financial Highlights The following financial highlights for the three months ended March 31, 2024 are calculated for the Unitholders as a whole and exclude data for the General Partner, except as otherwise noted herein. Calculation of these highlights on an individual Unitholder basis may yield results that vary from those stated herein due to the timing of capital transactions and differing fee arrangements. BXPE U.S. had not received subscriptions or commenced investing activities during the three months ended March 31, 2023. Three Months Ended March 31, 2024 Class S Units Class D Units Class I Units Per Unit Data Net Asset Value, Beginning of Period  $ —  $ —  $ 25.00 Proceeds from Units Issued 25.00 25.00 — Net Investment Income (0.01 ) (0.01 ) (0.01 ) Net Change in Unrealized Gain (Loss) on Investments Allocated from BXPE US Aggregator (CYM) L.P. 0.44 0.44 0.44 Servicing Fees (1.70 ) (0.50 ) — Net Increase (Decrease) in Net Assets Resulting from Operations (1.27 ) (0.07 ) 0.43 Net Asset Value, End of Period  $ 23.73  $ 24.93  $ 25.43 Units Outstanding, End of Period 32,272,800 1,616,129 43,433,515 Total Return Based on Net Asset Value (a) -5.08 % -0.28 % 1.71 % Ratios to Weighted Average Net Assets (Non-Annualized) Expenses without Waivers (b) 0.12 % 0.12 % 0.12 % Warehousing Fees Waivers -0.07 % -0.07 % -0.07 % Total Expenses 0.05 % 0.05 % 0.05 % Net Investment Income (Loss) -0.05 % -0.05 % -0.05 % (a) Total return is calculated as the change in Net Asset Value per Unit during the period, plus distributions per Unit (assuming dividends and distributions are reinvested in accordance with BXPE U.S.’s distribution reinvestment plan) divided by the beginning Net Asset Value per Unit. Total return does not include upfront transaction fees, if any. (b) Expense ratio includes Professional Fees, Directors’ Fees, Warehousing Fees and Other.
BXPE US Aggregator CYM L P [Member]
Investment Company, Financial Highlights [Line Items]
Financial Highlights	8. Financial Highlights The following financial highlights for the three months ended March 31, 2024 are calculated for the limited partners as a whole. Calculation of these highlights on an individual limited partner basis may yield results that vary from those stated herein due to the timing of capital transactions and differing fee arrangements. No Class A Units were outstanding during the three months ended March 31, 2023. No Class B Units have been issued by the Aggregator since inception. Three Months Ended March 31, 2024 Class A Units Per Unit Data Net Asset Value, Beginning of Period  $ — Proceeds from Units Issued 25.00 Net Investment Income 0.11 Net Realized and Unrealized Gain (Loss) on Investments and Translation of Assets and Liabilities in Foreign Currencies 0.33 Net Increase in Net Assets Resulting from Operations 0.44 Net Asset Value, End of Period  $ 25.44 Units Outstanding, End of Period 100,725,569 Total Return Based on Net Asset Value (a) 1.75 % Ratios to Weighted Average Net Assets (Non-Annualized) Expenses without Waivers (b) 0.78 % Expenses and Management Fees Waivers (b) -0.33 % Accrued Performance Participation Allocation 0.29 % Total Expenses 0.74 % Net Investment Income 0.68 % (a) Total return is calculated as the change in Net Asset Value per Unit during the period, plus distributions per Unit (assuming dividends and distributions are reinvested in accordance with the Aggregator’s distribution reinvestment plan) divided by the beginning Net Asset Value per Unit. Total return does not include upfront transaction fees, if any. (b) Expense ratio includes Management Fees, Organizational Expenses, Professional Fees, Deferred Offering Costs Amortization, Administration Fees and Other.

Subsequent Events

Subsequent Events	3 Months Ended
	Mar. 31, 2024
Subsequent Event [Line Items]
Subsequent Events	10. Subsequent Events There have been no events since March 31, 2024 that require recognition or disclosure in the Condensed Financial Statements.
BXPE US Aggregator (CYM) L.P [Member]
Subsequent Event [Line Items]
Subsequent Events	9. Subsequent Events The Aggregator has evaluated the impact of all subsequent events through May 14, 2024, which is the date that these Condensed Consolidated Financial Statements were available to be issued, and has determined that there were no subsequent events requiring adjustment to or disclosure in the Condensed Consolidated Financial Statements.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2024
Basis of Presentation	Basis of Presentation The accompanying unaudited condensed financial statements of BXPE U.S. have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information and the instructions to Form 10-Q. Financial Services—Investment Companies 10-K
Principles of Consolidation	Principles of Consolidation In accordance with ASC 946, BXPE U.S. generally does not consolidate investments unless BXPE U.S. has a controlling financial interest in an investment company or operating company whose business consists of providing services to BXPE U.S. A controlling financial interest is defined as (a) the power to direct the activities of the investment company that most significantly impact the entity’s economic performance and (b) the obligation to absorb losses of the entity or the right to receive benefits from the entity that could potentially be significant to the investment company. BXPE U.S. determines whether it has a controlling financial interest in an investment company at such company’s inception and continuously reconsiders that conclusion. In instances where BXPE U.S. wholly owns another investment company, BXPE U.S. believes this would constitute a controlling interest and consolidation would be appropriate. For non-wholly BXPE U.S. does not have a controlling financial interest in, and as a result, does not consolidate the Aggregator, nor any other reporting entities within BXPE, because (a) the General Partner is not acting solely on behalf of BXPE U.S. as it carries out its duties, and (b) BXPE U.S. does not absorb essentially all of the Aggregator’s variability. At each reporting date, BXPE U.S. assesses whether it has a controlling financial interest in the Aggregator or any other reporting entities within BXPE, and any associated consolidation implications.
Valuation of Investments at Fair Value	Valuation of Investments at Fair Value BXPE U.S. has indirect exposure to gains and losses on underlying investments because it invests in the Aggregator which, in turn, holds such underlying investments through the Aggregator’s subsidiaries. Valuations of investments held by the Aggregator are disclosed in the notes to the Aggregator’s condensed consolidated financial statements. For information regarding net realized and change in unrealized gains and losses on such investments held indirectly by BXPE U.S., please see the Aggregator’s condensed consolidated financial statements included following these condensed financial statements and please see Note 3. “Investments and Fair Value Measurement” in the “Notes to Condensed Consolidated Financial Statements” of BXPE US Aggregator (CYM) L.P. for information regarding the valuation of investments. BXPE U.S. measures its investment in the Aggregator at fair value using the net asset value of the Aggregator. The net asset value of the Aggregator is considered a practical expedient that represents fair value as (a) the investment does not have a readily determinable fair value because the Aggregator’s net asset value is not published or the basis for current transactions, (b) the Aggregator is an investment company, and (c) the net asset value of the Aggregator is calculated in a manner in which all of its investments are reported at fair value as of the measurement date. Changes in the fair value of BXPE U.S.’s investment in the Aggregator are presented within Net Change in Unrealized Gains (Loss) on Investments Allocated from BXPE US Aggregator (CYM) L.P. in the Condensed Statement of Operations.
Cash and Cash Equivalents	Cash and Cash Equivalents Cash and Cash Equivalents represents cash on hand, cash held in banks and short-term, highly liquid investments with original maturities of three months or less. BXPE U.S. may have bank balances in excess of federally insured amounts; however, BXPE U.S. deposits its Cash and Cash Equivalents with high credit-quality institutions to minimize credit risk.
Income Taxes	Income Taxes BXPE U.S. is treated as a partnership for U.S. federal income tax purposes and therefore is not subject to any U.S. federal and state income taxes. It is possible that BXPE U.S. may be considered a publicly traded partnership and not meet the qualifying income exception in certain years. In such a scenario, BXPE U.S. would be treated as a publicly traded partnership taxed as a corporation, rather than a partnership. The members of BXPE U.S. would be treated as shareholders in a corporation, and BXPE U.S. itself would become taxable as a corporation for U.S. federal, state and/or local income tax purposes. BXPE U.S. would be required to pay income tax at corporate rates on its net taxable income.
BXPE US Aggregator (CYM) L.P [Member]
Basis of Presentation	Basis of Presentation The accompanying unaudited condensed consolidated financial statements of the Aggregator have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”). The Aggregator is considered an investment company under GAAP and follows the accounting and reporting guidance applicable to investment companies in the Financial Accounting Standards Board Accounting Standards Codification (“ASC”) Topic 946, Financial Services—Investment Companies
Principles of Consolidation	Principles of Consolidation In accordance with ASC 946, the Aggregator generally does not consolidate its investment in a company unless the Aggregator has a controlling financial interest in an investment company or operating company whose business consists of providing services to the Aggregator. Accordingly, the Aggregator consolidates wholly owned investment company subsidiaries. All intercompany balances and transactions have been eliminated in consolidation.
Valuation of Investments at Fair Value	Fair Value of Investments and Financial Instruments ASC 820-10, Fair Value Measurement Investments measured and reported at fair value are classified and disclosed in one of the following categories: ● Level I – Quoted prices are available in active markets for identical investments as of the reporting date. The type of investments included in Level I are publicly-traded securities in an active market. The Aggregator does not adjust the quoted price for these investments (to the extent it holds them) even in situations where the Aggregator holds a large position and a sale could reasonably impact the quoted price. ● Level II – Pricing inputs are other than quoted prices in active markets, which are either directly or indirectly observable as of the reporting date, and fair value is determined through the use of models or other valuation methodologies. The types of investments that would generally be included in this category include publicly-traded securities with restrictions on disposition, and certain convertible securities. ● Level III – Pricing inputs are unobservable and include situations where there is little, if any, market activity for the investment. Fair value for these investments is determined using valuation methodologies that consider a range of factors, including but not limited to, the price at which the investment was acquired, the nature of the investment, local market conditions, valuations for comparable companies, current and projected operating performance and financing transactions subsequent to the acquisition of the investment. The inputs into the determination of fair value require significant judgment. Due to the inherent uncertainty of these estimates, these values may differ materially from the values that would have been used had a ready market for these investments existed. Investments that are included in this category generally are privately-held debt, equity and certain convertible securities. In certain cases the inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, an investment’s level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement. The Investment Manager’s assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment, and considers factors specific to the investment.
Investments at Fair Value and Investments in Affiliated Investee Funds	Investments at Fair Value and Investments in Affiliated Investee Funds Investments at Fair Value The Aggregator values its investments at fair value in accordance with ASC 820. Fair value is the amount that would be received to sell an asset or paid to transfer a liability, in an orderly transaction between market participants at the measurement date. In the absence of observable market prices, the Aggregator’s investments are valued using valuation methodologies applied on a consistent basis as described below. Additional information regarding these investments is provided in Note 3. “Investments and Fair Value Measurement.” The Aggregator’s determination of fair value is based on the best information available in the circumstances and incorporates the Aggregator’s own assumptions, including assumptions that the Aggregator believes market participants would use in valuing the investments, and involves a significant degree of judgment, taking into consideration a combination of internal and external factors, including appropriate risk adjustments for non-performance Under the income approach, which is generally the Aggregator’s primary valuation approach, fair value is determined by converting future amounts, such as cash flows or earnings, discounted to a single present amount using current market expectations about those future amounts. In determining fair value under this approach, the Aggregator makes assumptions over a projection period regarding unobservable inputs such as revenues, operating income, capital expenditures, income taxes, working capital needs and the terminal value and exit multiple of the investee company, among other things. The Aggregator discounts those projected cash flows by deriving a discount rate based on a capital structure similar to that of a market participant using observable inputs such as the rate of return available in the market on an investment free of default risk, an equity risk premium to reflect the additional risk of a market portfolio of equity instruments over risk free instruments, beta as a measure of risk based on share price correlation to the market, and equity and debt-to-capital Under the market approach, which is generally the Aggregator’s secondary valuation approach, fair value may be determined by reference to a recent transaction involving the investment or by reference to observable valuation measures for companies or assets that are determined by the Aggregator to be comparable, such as multiplying a key performance metric of the investee company, such as earnings before interest and taxes or other performance metric, by a relevant valuation multiple observed in the range of comparable companies or transactions, adjusted by the Aggregator for differences between the investment and the referenced comparables. Observable inputs used in the market approach to derive a valuation multiple may include the public prices for securities issued by, and the relevant performance metrics of, companies deemed comparable to the investee company, and/or transaction prices involving significant equity interests in companies deemed comparable to the investee company. Unobservable inputs used in the market approach may include the key performance metric of the investee company, such as earnings before interest, taxes, depreciation and amortization (“EBITDA”). Investments may also be valued at their acquisition price for a period of time after an acquisition as the best measure of fair value in the absence of any conditions or circumstances that would indicate otherwise. In the event of an announced sale of investments with a definitive agreement in place, investments may also be valued using a discount-to-sale break-up Investments in debt securities that are not listed on an exchange, but for which external pricing sources, such as dealer quotes or independent pricing services may be available, are valued by the Aggregator after considering, among other factors, such external pricing sources, recent trading activity or market transactions of similar securities adjusted for security specific factors such as relative capital structure priority and interest and yield risks. Publicly-traded investments in active markets are reported at the market closing price, less a discount, as appropriate, as determined by the Aggregator to reflect restrictions on disposition where such restrictions are an attribute of the investment. Convertible preferred investments may be valued using an option pricing model based on the specific terms of the security, including but not limited to, the publicly-traded share price of the common shares or units in active markets as of the reporting date, preferred-in-kind Investments in Affiliated or Unaffiliated Investee Funds Investments in affiliated or unaffiliated investee funds (“Investee Funds”) are generally valued using the reported net asset value (“NAV” or “Net Asset Value”) of the Investee Funds as a practical expedient for fair value. The Aggregator may, as a practical expedient, estimate the fair value of an Investee Fund based on NAV if the reported NAV of the Investee Fund is calculated in a manner consistent with the measurement principles applied to investment companies and the Aggregator has internal processes to independently evaluate the fair value measurement process utilized by the underlying Investee Fund to calculate the Investee Fund’s NAV, both of which are in accordance with ASC 946. Such internal processes include the evaluation of the Investee Fund’s own process and related internal controls in place to estimate the fair value of its underlying investments that are included in the NAV calculation, performing ongoing operational due diligence, review of the Investee Fund’s financial statements and ongoing monitoring of other relevant qualitative and quantitative factors. If the Aggregator determines, based on its own due diligence and investment monitoring procedures, that NAV does not represent fair value or if the investee fund is not an investment company, such as a collateralized loan obligation (“CLO”) vehicle, the Aggregator will estimate the fair value in good faith and in a manner that it reasonably chooses, in accordance with its valuation policies.
Cash and Cash Equivalents	Cash and Cash Equivalents Cash and Cash Equivalents represents cash on hand, cash held in banks, money market funds, Treasury Bills and short-term, highly liquid investments with original maturities of three months or less. Interest income from Cash and Cash Equivalents is recorded in Interest Income in the Condensed Consolidated Statement of Operations. The Aggregator may have bank balances in excess of federally insured amounts; however, the Aggregator deposits its Cash and Cash Equivalents with high credit-quality institutions to minimize credit risk.
Performance Participation Allocation, Administration Fee and Management Fee Payables	Performance Participation Allocation, Administration Fee and Management Fee Payables For more information regarding these payables reported on the Condensed Consolidated Statements of Assets and Liabilities, see Note 5. “Related Party Transactions.”
Foreign Currency	Foreign Currency In the normal course of business, the Aggregator makes investments outside the United States (“U.S.”) through subsidiaries with a non-U.S. Non-U.S. non-U.S.
Net Realized and Unrealized Gain (Loss) on Investments	Net Realized and Unrealized Gain (Loss) on Investments The Aggregator recognizes net realized gains (losses) on investments when earned at the time of receipt of proceeds. Without regard to unrealized gains or losses previously recognized, realized gains or losses will be measured as the difference between the net proceeds from the sale, repayment or disposal of an asset and the adjusted cost basis of the asset. Net Change in Unrealized Gain (Loss) on Investments is the change in fair value of its underlying investments. Net change in unrealized gains or losses will reflect the change in investment values during the reporting period, including any reversal of previously recorded unrealized gains or losses when gains or losses are realized.
Income Recognition	Income Recognition The Aggregator recognizes interest income from private investments when earned pursuant to the terms of the respective investment. The Aggregator recognizes dividend income from publicly-traded securities on the ex-dividend
Organizational and Offering Expenses	Organizational and Offering Expenses Prior to BXPE U.S. and the Feeder first accepting third party investors and commencing investment operations on January 2, 2024, organizational and offering expenses were paid by the Investment Manager. After BXPE U.S. and the Feeder accepted third party investors and commenced investment operations, costs associated with the organization of BXPE were expensed. Costs associated with the offering of BXPE U.S. and the Feeder are capitalized as a deferred expense and included as an asset on the Condensed Consolidated Statements of Assets and Liabilities and amortized over a 12 month period from January 2, 2024. Organization and offering expenses are born by the Aggregator since the expenses benefit all investors that invest through the Feeder, BXPE U.S. or any Parallel Fund. Organizational expenses are reported in Organizational Expenses and offering
Management Fees Waived	Management Fees Waived The Investment Manager has agreed to waive the Management Fee (as defined in Note 5. “Related Party Transactions”) for the first six months following the date on which BXPE U.S. and the Feeder first accepted third party investors and commenced investment operations on January 2, 2024. The Investment Manager has the right to extend the Management Fee waiver at its discretion. The waived Management Fees are reported in Management Fees Waived on the Condensed Consolidated Statements of Operations. Refer to Note 5. “Related Party Transactions” for more information.
Expense Support	Expense Support The Investment Manager voluntarily agreed to pay certain expenses on behalf of BXPE such that the total expenses borne by BXPE (excluding interest expense, organization and offering expense, servicing fees, the Performance Participation Allocation (as defined in Note 5. “Related Party Transactions”) and taxes) do not exceed a certain threshold. The amount of expenses the Investment Manager has agreed to pay pursuant to this arrangement are reported in Expense Support on the Condensed Consolidated Statements of Operations and reported in Accounts Receivable on the Condensed Consolidated Statements of Assets and Liabilities. Refer to Note 5. “Related Party Transactions” for more information.
Income Taxes	Income Taxes The Aggregator is treated as a partnership for income tax purposes and is not directly subject to income taxes. It is possible that the Aggregator may be considered a publicly traded partnership and not meet the qualifying income exception in certain years. In such a scenario, the Aggregator would be treated as a publicly traded partnership taxed as a corporation, rather than a partnership. The members of the Aggregator would be treated as shareholders in a corporation, and the Aggregator itself would become taxable as a corporation for U.S. federal, state and/or local income tax purposes. The Aggregator would be required to pay income tax at corporate rates on its net taxable income. Additionally, the Aggregator owns a controlling interest in several subsidiaries that are treated as corporations for U.S. and non-U.S.
Recent Accounting Pronouncements	Recent Accounting Pronouncements In June 2022, the Financial Accounting Standards Board issued amended guidance on the accounting for Fair Value Measurement of Equity Securities Subject to Contractual Sale Restrictions. The guidance requires that reporting entities not consider contractual sale restrictions that prohibit the sale of equity securities when measuring fair value and introduces new disclosure requirements for equity securities subject to contractual sale restrictions. The Aggregator will adopt the amended guidance on January 1, 2025. Upon adoption, the Aggregator does not expect a significant impact on the condensed consolidated financial statements or any measurement impacts, but will update disclosures to comply with the new requirements.

Investments and Fair Value Me_2

Investments and Fair Value Measurement (Tables) - BXPE US Aggregator (CYM) L.P [Member]	3 Months Ended
	Mar. 31, 2024
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Summary of Fair Value Measurements Recurring and Nonrecurring	The following table summarizes the valuation of the Aggregator’s investments by the fair value hierarchy levels as of March 31, 2024: March 31, 2024 Level I Level II Level III NAV Total Assets Cash and Cash Equivalents Cash Held at Banks  $ 30,861  $ —  $ —  $ —  $ 30,861 Money Market Fund 138,988   —   —   —   138,988   Short Term Investments — 399,233 — — 399,233 Total Cash and Cash Equivalents 169,849 399,233 — — 569,082 Investments Portfolio Companies — — 666,449 — 666,449 Debt Securities — 858,792 1,409 — 860,201 Total Investments — 858,792 667,858 — 1,526,650 Investments in Affiliated Investee Funds — — 86,476 517,236 603,712  $ 169,849  $ 1,258,025  $ 754,334  $ 517,236  $ 2,699,444
Summary of Fair Value Measurement Inputs and Valuation Techniques	The following table summarizes the quantitative inputs and assumptions used for valuation of investments categorized in Level III of the fair value hierarchy as of March 31, 2024: Fair Value Valuation Techniques Unobservable Inputs Ranges Weighted- Impact to Financial Assets Investments Portfolio Companies  $ 405,448 Discounted Cash Flows WACC 7.9% - 22.8% 17.3% Lower NOI Capital Exit Rate 6.3% 6.3% Lower Exit Multiple 11.2x - 22.0x 18.0x Higher 261,001   Transactional Value n/a Debt Securities 1,409 Market Quotations Total Investments 667,858 Investments in Affiliated Investee Funds 86,476 Discounted Cash Flows WACC 17.5% - 18.5% 18.0% Lower  $ 754,334
Summary of Fair Value Assets Measured on Recurring Basis Unobservable Input Reconciliation	For the three months ended March 31, 2024, the following table presents changes in the fair value of investments for which Level III inputs were used to determine the fair value: Level III Financial Assets at Fair Value Three Months Ended March 31, 2024 Affiliated Portfolio Debt Investee Companies Securities Funds Total Balance, Beginning of Period  $ —  $ —  $ —  $ — Purchases 657,094 1,400 84,040 742,534 Net Change in Unrealized Gain (Loss) on Investments 11,309   9   2,436   13,754   Net Change in Unrealized Gain (Loss) on Translation of Assets and Liabilities in Foreign Currencies (1,954 ) — — (1,954 ) Balance, End of Period  $ 666,449  $ 1,409  $ 86,476  $ 754,334 Changes in Unrealized Gains (Losses) Included in Earnings Related to Financial Assets Still Held at the Reporting Date  $ 9,355  $ 9  $ 2,436  $ 11,800
Summary of Fair Value of Investments in Affiliates and unfunded commitment	Investments in Investee Funds by Strategy Unfunded Fair Value Private Equity Strategic Partners IX Investments - B L.P.  $ 24,125    $ 2,215    SP Tortuga Acquisitions L.P. 25,400 24,600  49,525 26,815  Credit Blackstone Credit Rated Fund Trust LP 86,602 17,295  Captree Park CLO, Ltd. — 357,096  Peebles Park CLO, Ltd. — 46,485  Bayswater Park CLO, Ltd. — 39,992  BSOF SRT Parallel Onshore Fund L.P. — 71,421  BSOF Parallel Onshore Fund L.P. — 44,608  86,602 576,897   $ 136,127  $ 603,712

Net Assets (Tables)

Net Assets (Tables)	3 Months Ended
	Mar. 31, 2024
Net Asset [Line Items]
Summary of the Units issued during the period	The following table provides a summary of the Units issued during the three months ended March 31, 2024 and 2023: Class S Units Class D Units Class I Units Total Units Outstanding as of December 31, 2022 and March 31, 2023 — — 4,000 4,000 Units Outstanding as of December 31, 2023 — — 4,000 4,000  Units Issued During the Period 32,272,800 1,616,129 43,429,515 77,318,444 Units Outstanding as of March 31, 2024  32,272,800  1,616,129  43,433,515  77,322,444
BXPE US Aggregator (CYM) L.P [Member]
Net Asset [Line Items]
Summary of the Units issued during the period	The following table provides a summary of the Units issued during the three months ended March 31, 2024 and 2023. Class A Units Total Units Outstanding as of December 31, 2022 and March 31, 2023 — — Units Outstanding as of December 31, 2023 — — Units Issued During the Period 100,725,569   100,725,569   Units Outstanding as of March 31, 2024 100,725,569 100,725,569

Financial Highlights (Tables)

Financial Highlights (Tables)	3 Months Ended
	Mar. 31, 2024
Investment Company, Financial Highlights [Line Items]
Capital Transactions and Differing Fee Arrangements	The following financial highlights for the three months ended March 31, 2024 are calculated for the Unitholders as a whole and exclude data for the General Partner, except as otherwise noted herein. Calculation of these highlights on an individual Unitholder basis may yield results that vary from those stated herein due to the timing of capital transactions and differing fee arrangements. BXPE U.S. had not received subscriptions or commenced investing activities during the three months ended March 31, 2023. Three Months Ended March 31, 2024 Class S Units Class D Units Class I Units Per Unit Data Net Asset Value, Beginning of Period  $ —  $ —  $ 25.00 Proceeds from Units Issued 25.00 25.00 — Net Investment Income (0.01 ) (0.01 ) (0.01 ) Net Change in Unrealized Gain (Loss) on Investments Allocated from BXPE US Aggregator (CYM) L.P. 0.44 0.44 0.44 Servicing Fees (1.70 ) (0.50 ) — Net Increase (Decrease) in Net Assets Resulting from Operations (1.27 ) (0.07 ) 0.43 Net Asset Value, End of Period  $ 23.73  $ 24.93  $ 25.43 Units Outstanding, End of Period 32,272,800 1,616,129 43,433,515 Total Return Based on Net Asset Value (a) -5.08 % -0.28 % 1.71 % Ratios to Weighted Average Net Assets (Non-Annualized) Expenses without Waivers (b) 0.12 % 0.12 % 0.12 % Warehousing Fees Waivers -0.07 % -0.07 % -0.07 % Total Expenses 0.05 % 0.05 % 0.05 % Net Investment Income (Loss) -0.05 % -0.05 % -0.05 % (a) Total return is calculated as the change in Net Asset Value per Unit during the period, plus distributions per Unit (assuming dividends and distributions are reinvested in accordance with BXPE U.S.’s distribution reinvestment plan) divided by the beginning Net Asset Value per Unit. Total return does not include upfront transaction fees, if any. (b) Expense ratio includes Professional Fees, Directors’ Fees, Warehousing Fees and Other.
BXPE US Aggregator CYM L P [Member]
Investment Company, Financial Highlights [Line Items]
Capital Transactions and Differing Fee Arrangements	The following financial highlights for the three months ended March 31, 2024 are calculated for the limited partners as a whole. Three Months Ended March 31, 2024 Class A Units Per Unit Data Net Asset Value, Beginning of Period  $ — Proceeds from Units Issued 25.00 Net Investment Income 0.11 Net Realized and Unrealized Gain (Loss) on Investments and Translation of Assets and Liabilities in Foreign Currencies 0.33 Net Increase in Net Assets Resulting from Operations 0.44 Net Asset Value, End of Period  $ 25.44 Units Outstanding, End of Period 100,725,569 Total Return Based on Net Asset Value (a) 1.75 % Ratios to Weighted Average Net Assets (Non-Annualized) Expenses without Waivers (b) 0.78 % Expenses and Management Fees Waivers (b) -0.33 % Accrued Performance Participation Allocation 0.29 % Total Expenses 0.74 % Net Investment Income 0.68 % (a) Total return is calculated as the change in Net Asset Value per Unit during the period, plus distributions per Unit (assuming dividends and distributions are reinvested in accordance with the Aggregator’s distribution reinvestment plan) divided by the beginning Net Asset Value per Unit. Total return does not include upfront transaction fees, if any. (b) Expense ratio includes Management Fees, Organizational Expenses, Professional Fees, Deferred Offering Costs Amortization, Administration Fees and Other.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies - Additional Information (Detail)	Jan. 02, 2024
BXPE US Aggregator (CYM) L.P [Member]
Amortized term of deferred expenses included as asset	12 months

Investment in the Aggregator -

Investment in the Aggregator - Additional Information (Detail)	Mar. 31, 2024
Investment In The Aggregator [Abstract]
Percentage of interest in the aggregator	76.70%

Line of Credit Agreement - Addi

Line of Credit Agreement - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Nov. 03, 2023
Line of Credit Agreement [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Line of Credit Facility [Line Items]
Debt instrument interest rate		3%
Line of Credit [Member]
Line of Credit Facility [Line Items]
Debt instrument, payment terms	Each advance under the A&R Line of Credit is repayable on the earliest of (a) the expiration of the A&R Line of Credit, (b) Finco’s demand and (c) the date on which the Investment Manager no longer acts as investment manager to the Borrowers, provided that the Borrowers will have 180 days to make such repayment in the cases of clauses (a) and (b) and 45 days to make such repayment in the case of clause (c).
Line of credit facility, maximum borrowing capacity		$ 300

Investments and Fair Value Me_3

Investments and Fair Value Measurement - Summary of Fair Value Measurements Recurring and Nonrecurring (Detail) - BXPE US Aggregator (CYM) L.P [Member] - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents	$ 569,082
Investments	1,526,650
Investments in Affiliated Investee Funds	603,712	$ 0
Total	2,699,444
Cash Held at Banks [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents	30,861
Money Market Fund [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents	138,988
Short Term Investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents	399,233
Portfolio Companies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	666,449
Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	860,201
Level I [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents	169,849
Total	169,849
Level I [Member] | Cash Held at Banks [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents	30,861
Level I [Member] | Money Market Fund [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents	138,988
Level II [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents	399,233
Investments	858,792
Total	1,258,025
Level II [Member] | Short Term Investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents	399,233
Level II [Member] | Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	858,792
Level III [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	667,858
Investments in Affiliated Investee Funds	86,476
Total	754,334
Level III [Member] | Portfolio Companies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	666,449
Level III [Member] | Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	1,409
NAV [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0
Investments in Affiliated Investee Funds	517,236
Total	$ 517,236

Investments and Fair Value Me_4

Investments and Fair Value Measurement - Summary of Fair Value Measurement Inputs and Valuation Techniques (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 1,965,305	$ 0
BXPE US Aggregator (CYM) L.P [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	1,526,650	0
Investments in Affiliated Investee Funds	603,712	$ 0
Total	2,699,444
Maximum [Member] | BXPE US Aggregator (CYM) L.P [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 0
Measurement Input WACC [Member] | Valuation Technique, Discounted Cash Flow [Member] | BXPE US Aggregator (CYM) L.P [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Valuation Techniques	Discounted CashFlows
Unobservable Inputs	WACC
Measurement Input WACC [Member] | Valuation Technique, Discounted Cash Flow [Member] | Maximum [Member] | BXPE US Aggregator (CYM) L.P [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement Input	0.185
Measurement Input WACC [Member] | Valuation Technique, Discounted Cash Flow [Member] | Minimum [Member] | BXPE US Aggregator (CYM) L.P [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement Input	0.175
Measurement Input WACC [Member] | Valuation Technique, Discounted Cash Flow [Member] | Weighted Average [Member] | BXPE US Aggregator (CYM) L.P [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement Input	0.18
Lower Impact [Member] | Measurement Input WACC [Member] | Valuation Technique, Discounted Cash Flow [Member] | BXPE US Aggregator (CYM) L.P [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impact to Valuation from an Increase in Input	Lower
Portfolio Companies [Member] | Valuation Technique Transactional Value [Member] | BXPE US Aggregator (CYM) L.P [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Valuation Techniques	TransactionalValue
Portfolio Companies [Member] | Measurement Input WACC [Member] | Valuation Technique, Discounted Cash Flow [Member] | BXPE US Aggregator (CYM) L.P [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Valuation Techniques	Discounted CashFlows
Unobservable Inputs	WACC
Portfolio Companies [Member] | Measurement Input WACC [Member] | Valuation Technique, Discounted Cash Flow [Member] | Maximum [Member] | BXPE US Aggregator (CYM) L.P [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement Input	0.228
Portfolio Companies [Member] | Measurement Input WACC [Member] | Valuation Technique, Discounted Cash Flow [Member] | Minimum [Member] | BXPE US Aggregator (CYM) L.P [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement Input	0.079
Portfolio Companies [Member] | Measurement Input WACC [Member] | Valuation Technique, Discounted Cash Flow [Member] | Weighted Average [Member] | BXPE US Aggregator (CYM) L.P [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement Input	0.173
Portfolio Companies [Member] | Measurement Input NOI Capital Exit Rate [Member] | Valuation Technique, Discounted Cash Flow [Member] | BXPE US Aggregator (CYM) L.P [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Unobservable Inputs	NOI Capital Exit Rate
Measurement Input	0.063
Portfolio Companies [Member] | Measurement Input NOI Capital Exit Rate [Member] | Valuation Technique, Discounted Cash Flow [Member] | Weighted Average [Member] | BXPE US Aggregator (CYM) L.P [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement Input	0.063
Portfolio Companies [Member] | Measurement Input Exit Multiple [Member] | Valuation Technique, Discounted Cash Flow [Member] | BXPE US Aggregator (CYM) L.P [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Unobservable Inputs	Exit Multiple
Portfolio Companies [Member] | Measurement Input Exit Multiple [Member] | Valuation Technique, Discounted Cash Flow [Member] | Maximum [Member] | BXPE US Aggregator (CYM) L.P [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement Input	0.22
Portfolio Companies [Member] | Measurement Input Exit Multiple [Member] | Valuation Technique, Discounted Cash Flow [Member] | Minimum [Member] | BXPE US Aggregator (CYM) L.P [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement Input	0.112
Portfolio Companies [Member] | Measurement Input Exit Multiple [Member] | Valuation Technique, Discounted Cash Flow [Member] | Weighted Average [Member] | BXPE US Aggregator (CYM) L.P [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement Input	0.18
Portfolio Companies [Member] | Lower Impact [Member] | Measurement Input WACC [Member] | Valuation Technique, Discounted Cash Flow [Member] | BXPE US Aggregator (CYM) L.P [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impact to Valuation from an Increase in Input	Lower
Portfolio Companies [Member] | Lower Impact [Member] | Measurement Input NOI Capital Exit Rate [Member] | Valuation Technique, Discounted Cash Flow [Member] | BXPE US Aggregator (CYM) L.P [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impact to Valuation from an Increase in Input	Lower
Portfolio Companies [Member] | Higher Impact [Member] | Measurement Input Exit Multiple [Member] | Valuation Technique, Discounted Cash Flow [Member] | BXPE US Aggregator (CYM) L.P [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impact to Valuation from an Increase in Input	Higher
Debt Securities [Member] | Market Quotations [Member] | BXPE US Aggregator (CYM) L.P [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Valuation Techniques	MarketQuotations
Fair Value, Inputs, Level 3 [Member] | BXPE US Aggregator (CYM) L.P [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 667,858
Investments in Affiliated Investee Funds	86,476
Total	754,334
Fair Value, Inputs, Level 3 [Member] | Measurement Input WACC [Member] | Valuation Technique, Discounted Cash Flow [Member] | BXPE US Aggregator (CYM) L.P [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments in Affiliated Investee Funds	86,476
Fair Value, Inputs, Level 3 [Member] | Portfolio Companies [Member] | Valuation Technique Transactional Value [Member] | BXPE US Aggregator (CYM) L.P [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	261,001
Fair Value, Inputs, Level 3 [Member] | Portfolio Companies [Member] | Measurement Input WACC [Member] | Valuation Technique, Discounted Cash Flow [Member] | BXPE US Aggregator (CYM) L.P [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	405,448
Fair Value, Inputs, Level 3 [Member] | Debt Securities [Member] | Market Quotations [Member] | BXPE US Aggregator (CYM) L.P [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 1,409

Investments and Fair Value Me_5

Investments and Fair Value Measurement - Summary of Fair Value of Investments in Affiliates and unfunded commitment (Detail) - BXPE US Aggregator (CYM) L.P [Member] - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Disclosure In Tabular Form Of Fair Value Of Investments In Affiliates And Unfunded Commitment [Line Items]
Unfunded Commitment	$ 136,127
Fair Value	603,712	$ 0
Private Equity [Member]
Disclosure In Tabular Form Of Fair Value Of Investments In Affiliates And Unfunded Commitment [Line Items]
Unfunded Commitment	49,525
Fair Value	26,815
Credit [Member]
Disclosure In Tabular Form Of Fair Value Of Investments In Affiliates And Unfunded Commitment [Line Items]
Unfunded Commitment	86,602
Fair Value	576,897
Strategic Partners IX Investments - B L.P. [Member] | Private Equity [Member]
Disclosure In Tabular Form Of Fair Value Of Investments In Affiliates And Unfunded Commitment [Line Items]
Unfunded Commitment	24,125
Fair Value	2,215
SP Tortuga Acquisitions L.P. [Member] | Private Equity [Member]
Disclosure In Tabular Form Of Fair Value Of Investments In Affiliates And Unfunded Commitment [Line Items]
Unfunded Commitment	25,400
Fair Value	24,600
Blackstone Credit Rated Fund Trust LP [Member] | Credit [Member]
Disclosure In Tabular Form Of Fair Value Of Investments In Affiliates And Unfunded Commitment [Line Items]
Unfunded Commitment	86,602
Fair Value	17,295
Captree Park CLO, Ltd. [Member] | Credit [Member]
Disclosure In Tabular Form Of Fair Value Of Investments In Affiliates And Unfunded Commitment [Line Items]
Fair Value	357,096
Peebles Park CLO, Ltd. [Member] | Credit [Member]
Disclosure In Tabular Form Of Fair Value Of Investments In Affiliates And Unfunded Commitment [Line Items]
Fair Value	46,485
Bayswater Park CLO, Ltd. [Member] | Credit [Member]
Disclosure In Tabular Form Of Fair Value Of Investments In Affiliates And Unfunded Commitment [Line Items]
Fair Value	39,992
BSOF SRT Parallel Onshore Fund L.P. [Member] | Credit [Member]
Disclosure In Tabular Form Of Fair Value Of Investments In Affiliates And Unfunded Commitment [Line Items]
Fair Value	71,421
BSOF Parallel Onshore Fund L.P. [Member] | Credit [Member]
Disclosure In Tabular Form Of Fair Value Of Investments In Affiliates And Unfunded Commitment [Line Items]
Fair Value	$ 44,608

Investments and Fair Value Me_6

Investments and Fair Value Measurement - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment company unrealized gain loss on investments after tax operating	$ 27,894	$ 0
BXPE US Aggregator (CYM) L.P [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment company unrealized gain loss on investments after tax operating	21,014	0
Investment company realized gains losses on investments after tax operating	(136)	$ 0
Investment, Affiliated Issuer [Member] | BXPE US Aggregator (CYM) L.P [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment company unrealized gain loss on investments after tax operating	10,200
Maximum [Member] | Investment, Affiliated Issuer [Member] | BXPE US Aggregator (CYM) L.P [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment company realized gains losses on investments after tax operating	$ 100

Investments and Fair Value Me_7

Investments and Fair Value Measurement - Summary of Fair Value Assets Measured on Recurring Basis Unobservable Input Reconciliation (Detail) - BXPE US Aggregator (CYM) L.P [Member] $ in Thousands	3 Months Ended
	Mar. 31, 2024 USD ($)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Purchases	$ 742,534
Net Change in Unrealized Gain (Loss) on Investments	13,754
Net Change in Unrealized Gain (Loss) on Translation of Assets and Liabilities in Foreign Currencies	(1,954)
Balance, End of Period	754,334
Changes in Unrealized Gains (Losses) Included in Earnings Related to Financial Assets Still Held at the Reporting Date	11,800
Portfolio Companies [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance, Beginning of Period	0
Purchases	657,094
Net Change in Unrealized Gain (Loss) on Investments	11,309
Net Change in Unrealized Gain (Loss) on Translation of Assets and Liabilities in Foreign Currencies	(1,954)
Balance, End of Period	666,449
Changes in Unrealized Gains (Losses) Included in Earnings Related to Financial Assets Still Held at the Reporting Date	9,355
Debt Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Purchases	1,400
Net Change in Unrealized Gain (Loss) on Investments	9
Balance, End of Period	1,409
Changes in Unrealized Gains (Losses) Included in Earnings Related to Financial Assets Still Held at the Reporting Date	9
Affiliated Investee [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Purchases	84,040
Net Change in Unrealized Gain (Loss) on Investments	2,436
Balance, End of Period	86,476
Changes in Unrealized Gains (Losses) Included in Earnings Related to Financial Assets Still Held at the Reporting Date	$ 2,436

Net Assets - Additional Informa

Net Assets - Additional Information (Detail)	Mar. 31, 2024 $ / shares
Net Asset [Line Items]
Net asset value per share	$ 25
Percentage of repurchase of units outstanding	3%
Percentage of early deduction units repurchased	5%
BXPE US Aggregator (CYM) L.P [Member]
Net Asset [Line Items]
Net asset value per share	$ 25

Net Assets - Summary of the Uni

Net Assets - Summary of the Units issued during the period (Detail) - shares	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Net Asset [Line Items]
Beginning Units Outstanding	4,000	4,000
Units Issued During the Period	77,318,444
Ending Units Outstanding	77,322,444	4,000
Class S Units [Member]
Net Asset [Line Items]
Beginning Units Outstanding	0	0
Units Issued During the Period	32,272,800
Ending Units Outstanding	32,272,800	0
Class D Units [Member]
Net Asset [Line Items]
Beginning Units Outstanding	0	0
Units Issued During the Period	1,616,129
Ending Units Outstanding	1,616,129	0
Class I Units [Member]
Net Asset [Line Items]
Beginning Units Outstanding	4,000	4,000
Units Issued During the Period	43,429,515
Ending Units Outstanding	43,433,515	4,000
BXPE US Aggregator (CYM) L.P [Member]
Net Asset [Line Items]
Beginning Units Outstanding	0	0
Units Issued During the Period	100,725,569
Ending Units Outstanding	100,725,569	0
BXPE US Aggregator (CYM) L.P [Member] | Class A Units [Member]
Net Asset [Line Items]
Beginning Units Outstanding	0	0
Units Issued During the Period	100,725,569
Ending Units Outstanding	100,725,569	0

Related Party Transactions - Ad

Related Party Transactions - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Related Party Transaction [Line Items]
Performance participation allocation	$ 4,600
Management fee attributable to subsidiary	5,100
Transaction fee from acqusitions	200
Administration fee payable	400
Servicing Fees Payable	$ 54,435		$ 0
Specified expenses as a percentage of net asset value maximum	0.50%
Class S [Member]
Related Party Transaction [Line Items]
Servicing Fees Payable	$ 54,500
Class D [Member]
Related Party Transaction [Line Items]
Servicing Fees Payable	$ 800
Dealer Manager [Member] | Dealer Manager Agreement [Member] | Maximum [Member]
Related Party Transaction [Line Items]
Percentage of annual rate on monthly servicing fee	0.85%
Dealer Manager [Member] | Dealer Manager Agreement [Member] | Minimum [Member]
Related Party Transaction [Line Items]
Percentage of annual rate on monthly servicing fee	0.25%
BXPE US Aggregator CYM L P [Member]
Related Party Transaction [Line Items]
Percentage of performance participation allocation	12.50%
Percentage of annual hurdle amount	5%
Related party transaction, rate	100%
Percentage of management fee of entity net asset value	1.25%
Administration fee payable rate	0.10%
Performance participation allocation	$ 5,200
Management fee expense	5,699	$ 0
Investment company voluntary fee waived	5,700
Accrued administration fees	500
Investments in affliated investee funds	603,700
Accrued waived expenses	$ 200

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail) - BXPE US Aggregator (CYM) L.P [Member] - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Commitments and Contingencies Disclosure [Line Items]
Deferred offering costs	$ 2,600
Deferred expense amortization period	12 months
Organizational expenses	$ 5,435	$ 0
Offering expenses	600
Unfunded investment commitments	304,200
Conditional investment commitments	647,900
Investment Manager [Member] | Offering Expenses [Member]
Commitments and Contingencies Disclosure [Line Items]
Related party transaction, amounts of transaction	7,900
Investment Manager [Member] | Organizational Expenses [Member]
Commitments and Contingencies Disclosure [Line Items]
Related party transaction, amounts of transaction	$ 5,400

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - BXPE US Aggregator CYM L P [Member] - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Income Tax Examination [Line Items]
Effective Income Tax Rate Reconciliation, Percent, Total	26.50%
Income Tax Expense (Benefit)	$ 314	$ 0

Warehousing Agreement - Additio

Warehousing Agreement - Additional Information (Detail) $ in Millions	Jan. 02, 2024 USD ($) Integer	Nov. 03, 2023 USD ($)
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Investment interest rate	5%
Payable investment purchase	$ 0
Number of investment and commitments | Integer	11
Warehouse Agreement [Member]
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Equity Method Investments		$ 500
Annualized Rate		5%
Warehouse Agreement [Member] | Finco And Its Affiliates [Member]
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Payment for purchase, investment, operating activity	$ 1.2

Financial Highlights - Schedule

Financial Highlights - Schedule of Capital Transactions and Differing Fee Arrangements (Detail)	3 Months Ended
	Mar. 31, 2024 $ / shares shares
Per Unit Data
Net Asset Value, End of Period	$ 25
Class S Units [Member]
Per Unit Data
Net Asset Value, Beginning of Period	0
Proceeds from Units Issued	25
Net Investment Income	(0.01)
Net Change in Unrealized Gain (Loss) on Investments Allocated from BXPE US Aggregator (CYM) L.P.	0.44
Servicing Fees	(1.7)
Net Increase (Decrease) in Net Assets Resulting from Operations	(1.27)
Net Asset Value, End of Period	$ 23.73
Units Outstanding, End of Period | shares	32,272,800
Total Return Based on Net Asset Value	(5.08%)	[1]
Ratios to Weighted Average Net Assets (Non-Annualized)
Expenses without Waivers	0.12%	[2]
Warehousing Fees Waivers	(0.07%)
Total Expenses	0.05%
Net Investment Income (Loss)	(0.05%)
Class D [Member]
Per Unit Data
Net Asset Value, Beginning of Period	$ 0
Proceeds from Units Issued	25
Net Investment Income	(0.01)
Net Change in Unrealized Gain (Loss) on Investments Allocated from BXPE US Aggregator (CYM) L.P.	0.44
Servicing Fees	(0.5)
Net Increase (Decrease) in Net Assets Resulting from Operations	(0.07)
Net Asset Value, End of Period	$ 24.93
Units Outstanding, End of Period | shares	1,616,129
Total Return Based on Net Asset Value	(0.28%)	[1]
Ratios to Weighted Average Net Assets (Non-Annualized)
Expenses without Waivers	0.12%	[2]
Warehousing Fees Waivers	(0.07%)
Total Expenses	0.05%
Net Investment Income (Loss)	(0.05%)
Class I [Member]
Per Unit Data
Net Asset Value, Beginning of Period	$ 25
Proceeds from Units Issued	0
Net Investment Income	(0.01)
Net Change in Unrealized Gain (Loss) on Investments Allocated from BXPE US Aggregator (CYM) L.P.	0.44
Servicing Fees	0
Net Increase (Decrease) in Net Assets Resulting from Operations	0.43
Net Asset Value, End of Period	$ 25.43
Units Outstanding, End of Period | shares	43,433,515
Total Return Based on Net Asset Value	1.71%	[1]
Ratios to Weighted Average Net Assets (Non-Annualized)
Expenses without Waivers	0.12%	[2]
Warehousing Fees Waivers	(0.07%)
Total Expenses	0.05%
Net Investment Income (Loss)	(0.05%)
BXPE US Aggregator CYM L P [Member]
Per Unit Data
Net Asset Value, End of Period	$ 25
BXPE US Aggregator CYM L P [Member] | Capital Unit, Class A [Member]
Per Unit Data
Net Asset Value, Beginning of Period	0
Proceeds from Units Issued	25
Net Investment Income	0.11
Net Change in Unrealized Gain (Loss) on Investments Allocated from BXPE US Aggregator (CYM) L.P.	0.33
Net Increase (Decrease) in Net Assets Resulting from Operations	0.44
Net Asset Value, End of Period	$ 25.44
Units Outstanding, End of Period | shares	100,725,569
Total Return Based on Net Asset Value	1.75%	[3]
Ratios to Weighted Average Net Assets (Non-Annualized)
Expenses without Waivers	0.78%	[4]
Warehousing Fees Waivers	(0.33%)	[4]
Accrued Performance Participation Allocation	0.29%
Total Expenses	0.74%
Net Investment Income (Loss)	0.68%
[1]Total return is calculated as the change in Net Asset Value per Unit during the period, plus distributions per Unit (assuming dividends and distributions are reinvested in accordance with BXPE U.S.’s distribution reinvestment plan) divided by the beginning Net Asset Value per Unit. Total return does not include upfront transaction fees, if any.[2]Expense ratio includes Professional Fees, Directors’ Fees, Warehousing Fees and Other.[3]Total return is calculated as the change in Net Asset Value per Unit during the period, plus distributions per Unit (assuming dividends and distributions are reinvested in accordance with the Aggregator’s distribution reinvestment plan) divided by the beginning Net Asset Value per Unit. Total return does not include upfront transaction fees, if any.[4]Expense ratio includes Management Fees, Organizational Expenses, Professional Fees, Deferred Offering Costs Amortization, Administration Fees and Other.

Financial Highlights - Addition

Financial Highlights - Additional Information (Detail) - BXPE US Aggregator CYM L P [Member] - shares	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023
Capital Unit, Class A [Member]
Investment Company, Financial Highlights [Line Items]
Limited Partners' Capital Account, Units Outstanding	100,725,569	0	0
Limited Partners' Capital Account, Units Issued	100,725,569	0
Capital Unit, Class B [Member]
Investment Company, Financial Highlights [Line Items]
Limited Partners' Capital Account, Units Outstanding	0	0
Limited Partners' Capital Account, Units Issued	0	0

Subsequent Events - Additional

Subsequent Events - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2024
BXPE US Aggregator CYM L P [Member]
Subsequent Event [Line Items]
Subsequent Event, Description	these Condensed Consolidated Financial Statements were available to be issued, and has determined that there were no subsequent events requiring adjustment to or disclosure in the Condensed Consolidated Financial Statements.