Blackstone Private Equity Strategies Fund 10-Q 13 Nov 24 2024 Q3 Quarterly report Financial data

Cover Page

Cover Page - shares	9 Months Ended
	Sep. 30, 2024	Oct. 31, 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	Sep. 30, 2024
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q3
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		58,495,889
Class D Units [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		2,179,247
Class I Units [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		84,353,960

Condensed Statements of Assets

Condensed Statements of Assets and Liabilities - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Assets
Investments at Fair Value	$ 3,718,151	$ 0
Cash and Cash Equivalents	1,431	100
Repurchases Receivable	1,999	0
Due From Affiliate	3	0
Total Assets	3,721,584	100
Liabilities and Net Assets
Due to Affiliates	331	0
Accounts Payable, Accrued Expenses and Other Liabilities	1,343	0
Payable for Investments Purchased	0
Repurchases Payable	1,904	0
Servicing Fees Payable	92,391	0
Total Liabilities	95,969	0
Commitments and Contingencies
Net Assets
General Partner Interest	250	0
Total Net Assets	3,625,615	100
Total Liabilities and Net Assets	3,721,584	100
BXPE US Aggregator (CYM) L.P [Member]
Assets
Investments at Fair Value	4,369,696	0
Investments in Affiliated Investee Funds at Fair Value (Cost $654,157)	715,098	0
Cash and Cash Equivalents	72,702	0
Accounts Receivable	3,959	0
Other Assets	54,760	0
Deferred Assets	889	0
Total Assets	5,217,104	0
Liabilities and Net Assets
Due to Affiliates	4,955	0
Accounts Payable and Accrued Expenses	4,204	0
Payable for Investments Purchased	26,942	0
Accrued Performance Participation Allocation	48,483	0
Management Fee Payable	15,074	0
Derivative Liabilities at Fair Value	28,783	0
Taxes Payable	13,541	0
Organization Costs Payable	5,585	0
Repurchases Payable	4,849	0
Administration Fees Payable	2,562	0
Offering Costs Payable	2,745	0
Total Liabilities	157,723	0
Commitments and Contingencies
Net Assets
Total Net Assets	5,059,381	0
Total Liabilities and Net Assets	5,217,104	0
Class S Units [Member]
Net Assets
Limited Partnership Unit	1,435,319	0
Class D Units [Member]
Net Assets
Limited Partnership Unit	59,322	0
Class I Units [Member]
Net Assets
Limited Partnership Unit	2,130,724	100
Capital Unit, Class A [Member] | BXPE US Aggregator (CYM) L.P [Member]
Net Assets
Limited Partnership Unit	5,059,381	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	9 Months Ended	12 Months Ended
	Sep. 30, 2024	Dec. 31, 2023
Investment owned, cost	$ 3,477,391
BXPE US Aggregator (CYM) L.P [Member]
Investment owned, cost	4,095,747
Investment, Affiliated Issuer [Member] | BXPE US Aggregator (CYM) L.P [Member]
Investment owned, cost	$ 654,157
Class S Units [Member]
Units authorized	unlimited	unlimited
Units issued	56,401,249	0
Units outstanding	56,401,249	0
Class D Units [Member]
Units authorized	unlimited	unlimited
Units issued	2,223,612	0
Units outstanding	2,223,612	0
Class I Units [Member]
Units authorized	unlimited	unlimited
Units issued	78,270,676	4,000
Units outstanding	78,270,676	4,000
Capital Unit, Class A [Member] | BXPE US Aggregator (CYM) L.P [Member]
Units authorized	unlimited	unlimited
Units issued	185,711,300	0
Units outstanding	185,711,300	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		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Expenses
Professional Fees	$ 412	$ 0	$ 1,367	$ 0
Directors' Fees	102	0	538	0
Warehousing Fees	0	0	1,166	0
Other	28	0	59	0
Total Expenses	542	0	3,130	0
Warehousing Fees Waived	0	0	(1,166)	0
Net Expenses	542	0	1,964	0
Net Investment Income (Loss)	(542)	0	(1,964)	0
Net Change in Unrealized Gain (Loss) on Investments Allocated from BXPE US Aggregator (CYM) L.P.	133,577	0	240,759	0
Net Realized and Unrealized Gain (Loss) on Investments, Derivative Instruments and Translation of Assets and Liabilities in Foreign Currencies
Net Increase in Net Assets Resulting from Operations	133,035	0	238,795	0
BXPE US Aggregator (CYM) L.P [Member]
Investment Income, Net [Abstract]
Interest Income	29,981	0	93,380	0
Dividend Income	7,731	0	7,731	0
Other	955	0	10,839	0
Total Income	38,667	0	111,950	0
Expenses
Professional Fees	6,227	0	10,443	0
Organizational expenses	932	0	6,408	0
Other	(93)	0	842	0
Management Fees	15,074	0	32,021	0
Performance Participation Allocation	27,697	0	48,482	0
Deferred Offering Costs Amortization	725	0	2,100	0
Administration Fees	1,206	0	2,562	0
Total Expenses	51,768	0	102,858	0
Management Fees Waived	0	0	(16,947)	0
Expense Support	0	0	(187)	0
Net Expenses	51,768	0	85,724	0
Net Investment Income Before Provision for Taxes	(13,101)	0	26,226	0
Provision for Taxes	11,191	0	13,541	0
Net Investment Income (Loss)	(24,292)	0	12,685	0
Net Realized and Unrealized Gain (Loss) on Investments, Derivative Instruments and Translation of Assets and Liabilities in Foreign Currencies
Net Realized Gain on Investments	2,539	0	1,495	0
Net Change in Unrealized Gain (Loss) on Investments	188,554	0	293,081	0
Net Change in Unrealized Gain (Loss) on Derivative Instruments	(31,720)	0	(28,783)	0
Net Change in Unrealized Gain (Loss) on Translation of Assets and Liabilities in Foreign Currencies	47,267	0	41,830	0
Net Realized and Unrealized Gain (Loss) on Investments, Derivative Instruments and Translation of Assets and Liabilities in Foreign Currencies	206,640	0	307,623	0
Net Increase in Net Assets Resulting from Operations	$ 182,348	$ 0	$ 320,308	$ 0

Condensed Statements of Changes

Condensed Statements of Changes in Net Assets - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Investment Company, Change in Net Assets [Line Items]
Net Assets	$ 2,919,885		$ 100
Proceeds from Units Issued	588,801		3,486,914
Net Investment Income (Loss)	(542)	$ 0	(1,964)	$ 0
Net Change in Unrealized Gain (Loss) on Investments Allocated from BXPE US Aggregator (CYM) L.P.	133,577	0	240,759	0
Servicing Fees	(14,205)		(98,293)
Conversion of Units Between Classes	0		0
Repurchase of Units, Net of Early Repurchase Deduction	(1,901)		(1,901)	0
Net Assets	3,625,615	100	3,625,615	100
BXPE US Aggregator (CYM) L.P [Member]
Investment Company, Change in Net Assets [Line Items]
Net Assets	4,165,981		0
Proceeds from Units Issued	715,901		4,743,922
Net Investment Income (Loss)	(24,292)	0	12,685	0
Net Realized Gain (Loss) on Investments	2,539	0	1,495	0
Net Change in Unrealized Gain (Loss) on Investments	188,554	0	293,081	0
Net Change in Unrealized Gain (Loss) on Derivative Instruments	(31,720)	0	(28,783)	0
Net Change in Unrealized Gain (Loss) on Translation of Assets and Liabilities in Foreign Currencies	47,267	0	41,830	0
Repurchase of Units, Net of Early Repurchase Deduction	(4,849)		(4,849)	0
Net Assets	5,059,381	0	5,059,381	0
Class S Units [Member]
Investment Company, Change in Net Assets [Line Items]
Net Assets	1,196,490		0
Proceeds from Units Issued	207,514		1,446,576
Net Investment Income (Loss)	(226)		(821)
Net Change in Unrealized Gain (Loss) on Investments Allocated from BXPE US Aggregator (CYM) L.P.	55,228		100,475
Servicing Fees	(13,977)		(97,134)
Conversion of Units Between Classes	(9,100)		(13,167)
Repurchase of Units, Net of Early Repurchase Deduction	(610)		(610)
Net Assets	1,435,319	0	1,435,319	0
Class D Units [Member]
Investment Company, Change in Net Assets [Line Items]
Net Assets	48,143		0
Proceeds from Units Issued	11,000		58,100
Net Investment Income (Loss)	(8)		(36)
Net Change in Unrealized Gain (Loss) on Investments Allocated from BXPE US Aggregator (CYM) L.P.	2,028		4,030
Servicing Fees	(228)		(1,159)
Conversion of Units Between Classes	(1,615)		(1,615)
Repurchase of Units, Net of Early Repurchase Deduction	2		2
Net Assets	59,322	0	59,322	0
Class I Units [Member]
Investment Company, Change in Net Assets [Line Items]
Net Assets	1,675,002		100
Proceeds from Units Issued	370,287		1,981,988
Net Investment Income (Loss)	(308)		(1,107)
Net Change in Unrealized Gain (Loss) on Investments Allocated from BXPE US Aggregator (CYM) L.P.	76,321		136,254
Servicing Fees	0		0
Conversion of Units Between Classes	10,715		14,782
Repurchase of Units, Net of Early Repurchase Deduction	(1,293)		(1,293)
Net Assets	2,130,724	100	2,130,724	100
General Partner Interest [Member]
Investment Company, Change in Net Assets [Line Items]
Net Assets	250		0
Proceeds from Units Issued	0		250
Net Investment Income (Loss)	0		0
Net Change in Unrealized Gain (Loss) on Investments Allocated from BXPE US Aggregator (CYM) L.P.	0		0
Servicing Fees	0		0
Conversion of Units Between Classes	0		0
Repurchase of Units, Net of Early Repurchase Deduction	0		0
Net Assets	250	0	250	0
Class A Units [Member] | BXPE US Aggregator (CYM) L.P [Member]
Investment Company, Change in Net Assets [Line Items]
Net Assets	4,165,981		0
Proceeds from Units Issued	715,901		4,743,922
Net Investment Income (Loss)	(24,292)		12,685
Net Realized Gain (Loss) on Investments	2,539		1,495
Net Change in Unrealized Gain (Loss) on Investments	188,554		293,081
Net Change in Unrealized Gain (Loss) on Derivative Instruments	(31,720)		(28,783)
Net Change in Unrealized Gain (Loss) on Translation of Assets and Liabilities in Foreign Currencies	47,267		41,830
Repurchase of Units, Net of Early Repurchase Deduction	(4,849)		(4,849)
Net Assets	5,059,381	0	5,059,381	0
Class B Units [Member] | BXPE US Aggregator (CYM) L.P [Member]
Investment Company, Change in Net Assets [Line Items]
Net Assets	0		0
Proceeds from Units Issued	0		0
Net Investment Income (Loss)	0		0
Net Realized Gain (Loss) on Investments	0		0
Net Change in Unrealized Gain (Loss) on Investments	0		0
Net Change in Unrealized Gain (Loss) on Derivative Instruments	0		0
Net Change in Unrealized Gain (Loss) on Translation of Assets and Liabilities in Foreign Currencies	0		0
Repurchase of Units, Net of Early Repurchase Deduction	0		0
Net Assets	$ 0	$ 0	$ 0	$ 0

Condensed Statements of Cash Fl

Condensed Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Operating Activities
Net Increase in Net Assets Resulting from Operations	$ 238,795	$ 0
Investment in Aggregator	(3,479,391)	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	(240,759)	0
Issuance of Class I Units for Directors' Fees	184	0
Cash Flows Due to Changes in Operating Assets and Liabilities
Due to Affiliates	331	0
Accounts Payable, Accrued Expenses and Other Liabilities	1,343	0
Net Cash Provided by (Used in) Operating Activities	(3,479,497)	0
Financing Activities
Proceeds from Issuance of Units	3,486,730	0
Payment for Servicing Fees	(5,902)	0
Net Cash Provided by Financing Activities	3,480,828	0
Cash and Cash Equivalents
Net Increase	1,331	0
Beginning of Period	100	100
End of Period	1,431	100
Supplemental Disclosure of Cash Flows Information
Cash Paid for Interest	8	0
Supplemental Disclosure of Non-Cash Investing and Financing Activities
Issuance of Class I Units for Directors' Fees	184	0
Accrued Servicing Fees	98,293	0
Repurchase of Units, Net of Early Repurchase Deduction	1,901	0
BXPE US Aggregator (CYM) L.P [Member]
Operating Activities
Net Increase in Net Assets Resulting from Operations	320,308	0
Purchases of Investments	(6,131,853)	0
Proceeds from Investments	1,383,236	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	(1,495)	0
Net Change in Unrealized (Gain) Loss on Investments	(293,081)	0
Net Change in Unrealized (Gain) Loss on Translation of Assets and Liabilities in Foreign Currencies	28,783	0
Net Change in Unrealized Loss on Translation of Assets and Liabilities in Foreign Currencies	(41,830)	0
Net Amortization of Debt Investments	121	0
Deferred Offering Costs Amortization	2,100	0
Cash Flows Due to Changes in Operating Assets and Liabilities
Accounts Receivable	(3,959)	0
Other Assets	(54,652)	0
Deferred Assets	(2,989)	0
Due to Affiliates	4,955	0
Accounts Payable and Accrued Expenses	4,204	0
Payable for Investments Purchased	26,942	0
Taxes Payable	13,541	0
Management Fee Payable	15,074	0
Administration Fees Payable	2,562	0
Organization Costs Payable	5,585	0
Offering Costs Payable	2,745	0
Accrued Performance Participation Allocation	48,483	0
Net Cash Provided by (Used in) Operating Activities	(4,671,220)	0
Financing Activities
Proceeds from Issuance of Units	4,743,922	0
Proceeds from Credit Facilities	383,000	0
Repayment of Credit Facilities	(383,000)	0
Net Cash Provided by Financing Activities	4,743,922	0
Cash and Cash Equivalents
Net Increase	72,702	0
Beginning of Period	0	0
End of Period	72,702	0
Supplemental Disclosure of Non-Cash Investing and Financing Activities
Repurchase of Units, Net of Early Repurchase Deduction	$ 4,849	$ 0

Condensed Schedule of Investmen

Condensed Schedule of Investments $ in Thousands	Sep. 30, 2024 USD ($)
Summary of Investment Holdings [Line Items]
Fair Value	$ 3,718,151
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Affiliated Investee Funds | Secondaries | Other Investments in Affiliated Investee Funds | Americas
Summary of Investment Holdings [Line Items]
Fair Value	$ 197,747
Fair Value as a Percentage of Net Assets	3.90%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Affiliated Investee Funds | Secondaries | Total Secondaries
Summary of Investment Holdings [Line Items]
Fair Value	$ 197,747
Fair Value as a Percentage of Net Assets	3.90%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Affiliated Investee Funds | Specialty Finance | Blackstone CLO Management LLC - Series 9 | Various
Summary of Investment Holdings [Line Items]
Fair Value	$ 291,496	[1]
Fair Value as a Percentage of Net Assets	5.80%	[1]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Affiliated Investee Funds | Specialty Finance | Other Investments in Affiliated Investee Funds | Americas
Summary of Investment Holdings [Line Items]
Fair Value	$ 225,855
Fair Value as a Percentage of Net Assets	4.50%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Affiliated Investee Funds | Specialty Finance | Total Specialty Finance
Summary of Investment Holdings [Line Items]
Fair Value	$ 517,351
Fair Value as a Percentage of Net Assets	10.20%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Affiliated Investee Funds | Total Affiliated Investee Funds (Cost $375,512 Americas, $278,645 Various)
Summary of Investment Holdings [Line Items]
Fair Value	$ 715,098
Fair Value as a Percentage of Net Assets	14.10%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Cash and Cash Equivalents | Cash | Cash Held at Banks | Americas
Summary of Investment Holdings [Line Items]
Fair Value	$ 11,170
Fair Value as a Percentage of Net Assets	0.20%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Cash and Cash Equivalents | Cash | Total Cash (Cost $11,170)
Summary of Investment Holdings [Line Items]
Fair Value	$ 11,170
Fair Value as a Percentage of Net Assets	0.20%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Cash and Cash Equivalents | Money Market Fund | Fidelity Institutional Treasury Portfolio Money Market Fund | Americas
Summary of Investment Holdings [Line Items]
Fair Value	$ 61,532
Fair Value as a Percentage of Net Assets	1.20%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Cash and Cash Equivalents | Money Market Fund | Total Money Market Fund (Cost $61,532 Americas)
Summary of Investment Holdings [Line Items]
Fair Value	$ 61,532
Fair Value as a Percentage of Net Assets	1.20%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Cash and Cash Equivalents | Total Cash and Cash Equivalents (Cost $72,702)
Summary of Investment Holdings [Line Items]
Fair Value	$ 72,702
Fair Value as a Percentage of Net Assets	1.40%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Derivative Instruments | Foreign Currency Contracts
Summary of Investment Holdings [Line Items]
Fair Value	$ (28,783)
Fair Value as a Percentage of Net Assets	(0.60%)
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Derivative Instruments | Total Derivative Instruments (Cost $-)
Summary of Investment Holdings [Line Items]
Fair Value	$ (28,783)
Fair Value as a Percentage of Net Assets	(0.60%)
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Investments | Business Services | Other Investments in Debt | Americas
Summary of Investment Holdings [Line Items]
Fair Value	$ 82,163	[2]
Fair Value as a Percentage of Net Assets	1.60%	[2]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Investments | Business Services | Total Business Services
Summary of Investment Holdings [Line Items]
Fair Value	$ 82,163
Fair Value as a Percentage of Net Assets	1.60%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Investments | Consumer | Other Investments in Debt | Americas
Summary of Investment Holdings [Line Items]
Fair Value	$ 112,044	[2]
Fair Value as a Percentage of Net Assets	2.20%	[2]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Investments | Consumer | Rio Holdings (CYM) L.P. (Outstanding principal of Euro 244,132) | EMEA
Summary of Investment Holdings [Line Items]
Fair Value	$ 282,215
Fair Value as a Percentage of Net Assets	5.60%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Investments | Consumer | Total Consumer
Summary of Investment Holdings [Line Items]
Fair Value	$ 394,259
Fair Value as a Percentage of Net Assets	7.80%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Investments | Energy | Other Investments in Debt | APAC
Summary of Investment Holdings [Line Items]
Fair Value	$ 6,040	[2]
Fair Value as a Percentage of Net Assets	0.10%	[2]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Investments | Energy | Other Investments in Debt | Americas
Summary of Investment Holdings [Line Items]
Fair Value	$ 37,662	[2]
Fair Value as a Percentage of Net Assets	0.70%	[2]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Investments | Energy | Total Energy
Summary of Investment Holdings [Line Items]
Fair Value	$ 43,702
Fair Value as a Percentage of Net Assets	0.90%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Investments | Financial Services | Other Investments in Equity | Americas
Summary of Investment Holdings [Line Items]
Fair Value	$ 107,502	[2]
Fair Value as a Percentage of Net Assets	2.10%	[2]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Investments | Financial Services | Other Investments in Equity | EMEA
Summary of Investment Holdings [Line Items]
Fair Value	$ 2,991	[2]
Fair Value as a Percentage of Net Assets	0.10%	[2]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Investments | Financial Services | Total Financial Services
Summary of Investment Holdings [Line Items]
Fair Value	$ 110,493
Fair Value as a Percentage of Net Assets	2.20%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Investments | Healthcare | Other Investments in Equity | Americas
Summary of Investment Holdings [Line Items]
Fair Value	$ 53,340	[2]
Fair Value as a Percentage of Net Assets	1.10%	[2]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Investments | Healthcare | Other Investments in Equity | EMEA
Summary of Investment Holdings [Line Items]
Fair Value	$ 3,962	[2]
Fair Value as a Percentage of Net Assets	0.10%	[2]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Investments | Healthcare | Total Healthcare
Summary of Investment Holdings [Line Items]
Fair Value	$ 57,302
Fair Value as a Percentage of Net Assets	1.10%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Investments | Industrials | Other Investments in Equity | Americas
Summary of Investment Holdings [Line Items]
Fair Value	$ 182,324	[2]
Fair Value as a Percentage of Net Assets	3.60%	[2]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Investments | Industrials | Total Industrials
Summary of Investment Holdings [Line Items]
Fair Value	$ 182,324
Fair Value as a Percentage of Net Assets	3.60%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Investments | Infrastructure | Other Investments in Equity | Americas
Summary of Investment Holdings [Line Items]
Fair Value	$ 50,803	[2]
Fair Value as a Percentage of Net Assets	1%	[2]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Investments | Infrastructure | Total Infrastructure
Summary of Investment Holdings [Line Items]
Fair Value	$ 50,803
Fair Value as a Percentage of Net Assets	1%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Investments | Media & Entertainment | Other Investments in Equity | Americas
Summary of Investment Holdings [Line Items]
Fair Value	$ 8,532	[2]
Fair Value as a Percentage of Net Assets	0.20%	[2]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Investments | Media & Entertainment | Total Media & Entertainment
Summary of Investment Holdings [Line Items]
Fair Value	$ 8,532
Fair Value as a Percentage of Net Assets	0.20%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Investments | Software | Other Investments in Equity | Americas
Summary of Investment Holdings [Line Items]
Fair Value	$ 82,832	[2]
Fair Value as a Percentage of Net Assets	1.60%	[2]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Investments | Software | Total Software
Summary of Investment Holdings [Line Items]
Fair Value	$ 82,832
Fair Value as a Percentage of Net Assets	1.60%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Investments | Specialty Finance | Other Investments in Equity | Various
Summary of Investment Holdings [Line Items]
Fair Value	$ 17,964	[2]
Fair Value as a Percentage of Net Assets	0.40%	[2]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Investments | Specialty Finance | Total Specialty Finance
Summary of Investment Holdings [Line Items]
Fair Value	$ 17,964
Fair Value as a Percentage of Net Assets	0.40%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Investments | Technology & Services | Other Investments in Equity | Americas
Summary of Investment Holdings [Line Items]
Fair Value	$ 197,325	[2]
Fair Value as a Percentage of Net Assets	3.90%	[2]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Investments | Technology & Services | Total Technology & Services
Summary of Investment Holdings [Line Items]
Fair Value	$ 197,325
Fair Value as a Percentage of Net Assets	3.90%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Business Services | Other Investments in Equity | Americas
Summary of Investment Holdings [Line Items]
Fair Value	$ 263,734	[1],[3]
Fair Value as a Percentage of Net Assets	5.20%	[1],[3]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Business Services | Other Investments in Equity | EMEA
Summary of Investment Holdings [Line Items]
Fair Value	$ 79,922	[3]
Fair Value as a Percentage of Net Assets	1.60%	[3]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Business Services | Total Business Services
Summary of Investment Holdings [Line Items]
Fair Value	$ 343,656
Fair Value as a Percentage of Net Assets	6.80%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Consumer | Other Investments in Equity | Americas
Summary of Investment Holdings [Line Items]
Fair Value	$ 258,069	[1],[3]
Fair Value as a Percentage of Net Assets	5.10%	[1],[3]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Consumer | Total Consumer
Summary of Investment Holdings [Line Items]
Fair Value	$ 258,069
Fair Value as a Percentage of Net Assets	5.10%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Energy | Other Investments in Equity | APAC
Summary of Investment Holdings [Line Items]
Fair Value	$ 544	[3]
Fair Value as a Percentage of Net Assets	0%	[3]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Energy | Other Investments in Equity | Americas
Summary of Investment Holdings [Line Items]
Fair Value	$ 23,696	[3]
Fair Value as a Percentage of Net Assets	0.50%	[3]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Energy | Total Energy
Summary of Investment Holdings [Line Items]
Fair Value	$ 24,240
Fair Value as a Percentage of Net Assets	0.50%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Financial Services | Higginbotham Investment Holdings, LP (231,030 Shares) | Americas
Summary of Investment Holdings [Line Items]
Fair Value	$ 271,348
Fair Value as a Percentage of Net Assets	5.40%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Financial Services | Other Investments in Equity | Americas
Summary of Investment Holdings [Line Items]
Fair Value	$ 82,348	[3]
Fair Value as a Percentage of Net Assets	1.60%	[3]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Financial Services | Other Investments in Equity | EMEA
Summary of Investment Holdings [Line Items]
Fair Value	$ 86,406	[3]
Fair Value as a Percentage of Net Assets	1.70%	[3]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Financial Services | Total Financial Services
Summary of Investment Holdings [Line Items]
Fair Value	$ 440,102
Fair Value as a Percentage of Net Assets	8.70%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Healthcare | Other Investments in Equity | Americas
Summary of Investment Holdings [Line Items]
Fair Value	$ 217,865	[3]
Fair Value as a Percentage of Net Assets	4.30%	[3]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Healthcare | Total Healthcare
Summary of Investment Holdings [Line Items]
Fair Value	$ 217,865
Fair Value as a Percentage of Net Assets	4.30%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Industrials | Air Control Concepts Holdings, L.P. (6,888,366 Shares) | Americas
Summary of Investment Holdings [Line Items]
Fair Value	$ 249,094
Fair Value as a Percentage of Net Assets	4.90%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Industrials | Other Investments in Equity | Americas
Summary of Investment Holdings [Line Items]
Fair Value	$ 76,497	[3]
Fair Value as a Percentage of Net Assets	1.50%	[3]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Industrials | Total Industrials
Summary of Investment Holdings [Line Items]
Fair Value	$ 325,591
Fair Value as a Percentage of Net Assets	6.40%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Infrastructure | Other Investments in Equity | Americas
Summary of Investment Holdings [Line Items]
Fair Value	$ 98,120	[3]
Fair Value as a Percentage of Net Assets	1.90%	[3]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Infrastructure | Other Investments in Equity | EMEA
Summary of Investment Holdings [Line Items]
Fair Value	$ 11,305	[3]
Fair Value as a Percentage of Net Assets	0.20%	[3]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Infrastructure | Total Infrastructure
Summary of Investment Holdings [Line Items]
Fair Value	$ 109,425
Fair Value as a Percentage of Net Assets	2.20%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Media & Entertainment | Aurelia Aggregator (CYM) L.P. (36,333 Shares) | EMEA
Summary of Investment Holdings [Line Items]
Fair Value	$ 303,653
Fair Value as a Percentage of Net Assets	6%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Media & Entertainment | IE Holdco S a.r.l. (337,625 Shares) | EMEA
Summary of Investment Holdings [Line Items]
Fair Value	$ 274,238
Fair Value as a Percentage of Net Assets	5.40%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Media & Entertainment | Other Investment(s) in Equity | APAC
Summary of Investment Holdings [Line Items]
Fair Value	$ 16,317	[3]
Fair Value as a Percentage of Net Assets	0.30%	[3]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Media & Entertainment | Songs Capital (Cayman) - NQ L.P. (Shares n/a) | EMEA
Summary of Investment Holdings [Line Items]
Fair Value	$ 267,249
Fair Value as a Percentage of Net Assets	5.30%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Media & Entertainment | Total Media & Entertainment
Summary of Investment Holdings [Line Items]
Fair Value	$ 861,457
Fair Value as a Percentage of Net Assets	17%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Software | Other Investments in Equity | Americas
Summary of Investment Holdings [Line Items]
Fair Value	$ 49,336	[3]
Fair Value as a Percentage of Net Assets	1%	[3]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Software | Other Investments in Equity | EMEA
Summary of Investment Holdings [Line Items]
Fair Value	$ 184,765	[3]
Fair Value as a Percentage of Net Assets	3.70%	[3]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Software | Total Software
Summary of Investment Holdings [Line Items]
Fair Value	$ 234,101
Fair Value as a Percentage of Net Assets	4.60%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Technology & Services | Other Investments in Equity | Americas
Summary of Investment Holdings [Line Items]
Fair Value	$ 307,491	[1],[3]
Fair Value as a Percentage of Net Assets	6.10%	[1],[3]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Technology & Services | Other Investments in Equity | EMEA
Summary of Investment Holdings [Line Items]
Fair Value	$ 20,000	[3]
Fair Value as a Percentage of Net Assets	0.40%	[3]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Technology & Services | Total Technology & Services
Summary of Investment Holdings [Line Items]
Fair Value	$ 327,491
Fair Value as a Percentage of Net Assets	6.50%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Total Debt Investments (Cost $897,229 Americas, $274,631 EMEA, $17,235 Various, $6,242 APAC)
Summary of Investment Holdings [Line Items]
Fair Value	$ 1,227,699
Fair Value as a Percentage of Net Assets	24.30%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Total Investments (Cost $4,095,747)
Summary of Investment Holdings [Line Items]
Fair Value	$ 4,369,696
Fair Value as a Percentage of Net Assets	86.40%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Total Portfolio Companies (Cost $1,757,204 Americas, $1,127,835 EMEA, $15,371 APAC)
Summary of Investment Holdings [Line Items]
Fair Value	$ 3,141,997
Fair Value as a Percentage of Net Assets	62.10%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Total Investments, Investments in Affiliated Investee Funds, Cash and Cash Equivalents and Derivative Instruments (Cost $4,822,606)
Summary of Investment Holdings [Line Items]
Fair Value	$ 5,128,713
Fair Value as a Percentage of Net Assets	101.40%
Investment, Identifier [Axis]: Investments | BXPE US Aggregator (CYM) L.P. | Investee Fund | Various | Various
Summary of Investment Holdings [Line Items]
Fair Value	$ 3,718,151
Fair Value as a Percentage of Net Assets	102.60%
Investment, Identifier [Axis]: Investments | Total Investments (Cost $3,477,391)
Summary of Investment Holdings [Line Items]
Fair Value	$ 3,718,151
Fair Value as a Percentage of Net Assets	102.60%
[1]There were no single investments included in this category that exceeded 5% of net assets of BXPE US Aggregator (CYM) L.P., Blackstone Private Equity Strategies Fund L.P. and Blackstone Private Equity Strategies Fund (TE) L.P.[2]Debt includes different forms of interests that represent a creditor relationship with an investee, including but not limited to (i) bank loans, (ii) interests in collateralized loan obligations (“CLOs”) and (iii) direct lending debt investments.[3]Equity includes different forms of interests and rights and obligations that represent ownership in an entity or the right to acquire or dispose of ownership in an entity, including but not limited to (i) common equity, (ii) preferred equity and (iii) other equity-linked securities.

Condensed Schedule of Investm_2

Condensed Schedule of Investments (Parenthetical) € in Thousands, $ in Thousands	Sep. 30, 2024 USD ($) shares		Sep. 30, 2024 EUR (€) shares		Dec. 31, 2023 USD ($)
Schedule of Investments [Line Items]
Investment Owned, Cost	$ 3,477,391
Investment Owned, Fair Value	3,718,151				$ 0
Cash	11,170
Cash and Cash Equivalents	$ 1,431				100
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P | Investments | Portfolio Companies | Financial Services | Higginbotham Investment Holdings, LP 231,030 Common Shares | Americas
Schedule of Investments [Line Items]
investment owned, balance, shares | shares	231,030		231,030
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P | Investments | Portfolio Companies | Industrials | Air Control Concepts Holdings L.P 6,888,366 Units | Americas
Schedule of Investments [Line Items]
investment owned, balance, shares | shares	6,888,366		6,888,366
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P | Total Investments, Investments in Affiliated Investee Funds, Cash and Cash Equivalents and Derivative Instruments (Cost $4,822,606)
Schedule of Investments [Line Items]
Investment Owned, Cost	$ 4,822,606
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Affiliated Investee Funds | Secondaries | Other Investments in Affiliated Investee Funds | Americas
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 197,747
Investment owned, percent of net assets	3.90%		3.90%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Affiliated Investee Funds | Secondaries | Total Secondaries
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 197,747
Investment owned, percent of net assets	3.90%		3.90%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Affiliated Investee Funds | Specialty Finance | Blackstone CLO Management LLC - Series 9 | Various
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 291,496	[1]
Investment owned, percent of net assets	5.80%	[1]	5.80%	[1]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Affiliated Investee Funds | Specialty Finance | Other Investments in Affiliated Investee Funds | Americas
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 225,855
Investment owned, percent of net assets	4.50%		4.50%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Affiliated Investee Funds | Specialty Finance | Total Specialty Finance
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 517,351
Investment owned, percent of net assets	10.20%		10.20%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Affiliated Investee Funds | Total Affiliated Investee Funds (Cost $278,645) Various
Schedule of Investments [Line Items]
Investment Owned, Cost	$ 278,645
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Affiliated Investee Funds | Total Affiliated Investee Funds (Cost $375,512 Americas, $278,645 Various)
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 715,098
Investment owned, percent of net assets	14.10%		14.10%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Affiliated Investee Funds | Total Affiliated Investee Funds (Cost $375,512) Americas
Schedule of Investments [Line Items]
Investment Owned, Cost	$ 375,512
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Cash and Cash Equivalents | Cash | Cash Held at Banks | Americas
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 11,170
Investment owned, percent of net assets	0.20%		0.20%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Cash and Cash Equivalents | Cash | Total Cash (Cost $11,170)
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 11,170
Investment owned, percent of net assets	0.20%		0.20%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Cash and Cash Equivalents | Money Market Fund | Fidelity Institutional Treasury Portfolio Money Market Fund | Americas
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 61,532
Investment owned, percent of net assets	1.20%		1.20%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Cash and Cash Equivalents | Money Market Fund | Total Money Market Fund (Cost $61,532 Americas)
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 61,532
Investment owned, percent of net assets	1.20%		1.20%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Cash and Cash Equivalents | Money Market Fund | Total Money Market Fund (Cost USD 61,532 Americas)
Schedule of Investments [Line Items]
Investment Owned, Cost	$ 61,532
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Cash and Cash Equivalents | Total Cash and Cash Equivalents (Cost $72,702)
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 72,702
Investment owned, percent of net assets	1.40%		1.40%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Cash and Cash Equivalents | Total Cash and Cash Equivalents (Cost USD 72,702)
Schedule of Investments [Line Items]
Cash and Cash Equivalents	$ 72,702
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Derivative Instruments | Foreign Currency Contracts
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ (28,783)
Investment owned, percent of net assets	(0.60%)		(0.60%)
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Derivative Instruments | Total Derivative Instruments (Cost $-)
Schedule of Investments [Line Items]
Investment Owned, Cost	$ 0
Investment Owned, Fair Value	$ (28,783)
Investment owned, percent of net assets	(0.60%)		(0.60%)
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Investments | Business Services | Other Investments in Debt | Americas
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 82,163	[2]
Investment owned, percent of net assets	1.60%	[2]	1.60%	[2]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Investments | Business Services | Total Business Services
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 82,163
Investment owned, percent of net assets	1.60%		1.60%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Investments | Consumer | Other Investments in Debt | Americas
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 112,044	[2]
Investment owned, percent of net assets	2.20%	[2]	2.20%	[2]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Investments | Consumer | Rio Holdings (CYM) L.P (Outstanding principal of Euro 244,132) | EMEA
Schedule of Investments [Line Items]
Investment owned, balance, principal amount | €			€ 244,132
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Investments | Consumer | Rio Holdings (CYM) L.P. (Outstanding principal of Euro 244,132) | EMEA
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 282,215
Investment owned, percent of net assets	5.60%		5.60%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Investments | Consumer | Total Consumer
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 394,259
Investment owned, percent of net assets	7.80%		7.80%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Investments | Energy | Other Investments in Debt | APAC
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 6,040	[2]
Investment owned, percent of net assets	0.10%	[2]	0.10%	[2]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Investments | Energy | Other Investments in Debt | Americas
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 37,662	[2]
Investment owned, percent of net assets	0.70%	[2]	0.70%	[2]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Investments | Energy | Total Energy
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 43,702
Investment owned, percent of net assets	0.90%		0.90%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Investments | Financial Services | Other Investments in Equity | Americas
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 107,502	[2]
Investment owned, percent of net assets	2.10%	[2]	2.10%	[2]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Investments | Financial Services | Other Investments in Equity | EMEA
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 2,991	[2]
Investment owned, percent of net assets	0.10%	[2]	0.10%	[2]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Investments | Financial Services | Total Financial Services
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 110,493
Investment owned, percent of net assets	2.20%		2.20%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Investments | Healthcare | Other Investments in Equity | Americas
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 53,340	[2]
Investment owned, percent of net assets	1.10%	[2]	1.10%	[2]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Investments | Healthcare | Other Investments in Equity | EMEA
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 3,962	[2]
Investment owned, percent of net assets	0.10%	[2]	0.10%	[2]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Investments | Healthcare | Total Healthcare
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 57,302
Investment owned, percent of net assets	1.10%		1.10%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Investments | Industrials | Other Investments in Equity | Americas
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 182,324	[2]
Investment owned, percent of net assets	3.60%	[2]	3.60%	[2]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Investments | Industrials | Total Industrials
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 182,324
Investment owned, percent of net assets	3.60%		3.60%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Investments | Infrastructure | Other Investments in Equity | Americas
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 50,803	[2]
Investment owned, percent of net assets	1%	[2]	1%	[2]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Investments | Infrastructure | Total Infrastructure
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 50,803
Investment owned, percent of net assets	1%		1%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Investments | Media & Entertainment | Other Investments in Equity | Americas
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 8,532	[2]
Investment owned, percent of net assets	0.20%	[2]	0.20%	[2]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Investments | Media & Entertainment | Total Media & Entertainment
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 8,532
Investment owned, percent of net assets	0.20%		0.20%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Investments | Software | Other Investments in Equity | Americas
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 82,832	[2]
Investment owned, percent of net assets	1.60%	[2]	1.60%	[2]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Investments | Software | Total Software
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 82,832
Investment owned, percent of net assets	1.60%		1.60%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Investments | Specialty Finance | Other Investments in Equity | Various
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 17,964	[2]
Investment owned, percent of net assets	0.40%	[2]	0.40%	[2]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Investments | Specialty Finance | Total Specialty Finance
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 17,964
Investment owned, percent of net assets	0.40%		0.40%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Investments | Technology & Services | Other Investments in Equity | Americas
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 197,325	[2]
Investment owned, percent of net assets	3.90%	[2]	3.90%	[2]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Debt Investments | Technology & Services | Total Technology & Services
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 197,325
Investment owned, percent of net assets	3.90%		3.90%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Business Services | Other Investments in Equity | Americas
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 263,734	[1],[3]
Investment owned, percent of net assets	5.20%	[1],[3]	5.20%	[1],[3]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Business Services | Other Investments in Equity | EMEA
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 79,922	[3]
Investment owned, percent of net assets	1.60%	[3]	1.60%	[3]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Business Services | Total Business Services
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 343,656
Investment owned, percent of net assets	6.80%		6.80%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Consumer | Other Investments in Equity | Americas
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 258,069	[1],[3]
Investment owned, percent of net assets	5.10%	[1],[3]	5.10%	[1],[3]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Consumer | Total Consumer
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 258,069
Investment owned, percent of net assets	5.10%		5.10%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Energy | Other Investments in Equity | APAC
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 544	[3]
Investment owned, percent of net assets	0%	[3]	0%	[3]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Energy | Other Investments in Equity | Americas
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 23,696	[3]
Investment owned, percent of net assets	0.50%	[3]	0.50%	[3]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Energy | Total Energy
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 24,240
Investment owned, percent of net assets	0.50%		0.50%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Financial Services | Higginbotham Investment Holdings, LP (231,030 Shares) | Americas
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 271,348
Investment owned, percent of net assets	5.40%		5.40%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Financial Services | Other Investments in Equity | Americas
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 82,348	[3]
Investment owned, percent of net assets	1.60%	[3]	1.60%	[3]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Financial Services | Other Investments in Equity | EMEA
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 86,406	[3]
Investment owned, percent of net assets	1.70%	[3]	1.70%	[3]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Financial Services | Total Financial Services
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 440,102
Investment owned, percent of net assets	8.70%		8.70%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Healthcare | Other Investments in Equity | Americas
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 217,865	[3]
Investment owned, percent of net assets	4.30%	[3]	4.30%	[3]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Healthcare | Total Healthcare
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 217,865
Investment owned, percent of net assets	4.30%		4.30%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Industrials | Air Control Concepts Holdings, L.P. (6,888,366 Shares) | Americas
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 249,094
Investment owned, percent of net assets	4.90%		4.90%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Industrials | Other Investments in Equity | Americas
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 76,497	[3]
Investment owned, percent of net assets	1.50%	[3]	1.50%	[3]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Industrials | Total Industrials
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 325,591
Investment owned, percent of net assets	6.40%		6.40%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Infrastructure | Other Investments in Equity | Americas
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 98,120	[3]
Investment owned, percent of net assets	1.90%	[3]	1.90%	[3]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Infrastructure | Other Investments in Equity | EMEA
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 11,305	[3]
Investment owned, percent of net assets	0.20%	[3]	0.20%	[3]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Infrastructure | Total Infrastructure
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 109,425
Investment owned, percent of net assets	2.20%		2.20%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Media & Entertainment | Aurelia Aggregator (CYM) L.P. (36,333 Shares) | EMEA
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 303,653
Investment owned, percent of net assets	6%		6%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Media & Entertainment | Aurelia Aggregator CYM L.P. 36,333 Ordinary Shares | EMEA
Schedule of Investments [Line Items]
investment owned, balance, shares | shares	36,333		36,333
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Media & Entertainment | IE Holdco S a.r.l. (337,625 Shares) | EMEA
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 274,238
Investment owned, percent of net assets	5.40%		5.40%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Media & Entertainment | IE Holdco S.a.r.l. (337,625 Common Shares) | EMEA
Schedule of Investments [Line Items]
investment owned, balance, shares | shares	337,625		337,625
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Media & Entertainment | Other Investment(s) in Equity | APAC
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 16,317	[3]
Investment owned, percent of net assets	0.30%	[3]	0.30%	[3]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Media & Entertainment | Songs Capital (Cayman) - NQ L.P. (Shares n/a) | EMEA
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 267,249
Investment owned, percent of net assets	5.30%		5.30%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Media & Entertainment | Total Media & Entertainment
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 861,457
Investment owned, percent of net assets	17%		17%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Software | Other Investments in Equity | Americas
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 49,336	[3]
Investment owned, percent of net assets	1%	[3]	1%	[3]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Software | Other Investments in Equity | EMEA
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 184,765	[3]
Investment owned, percent of net assets	3.70%	[3]	3.70%	[3]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Software | Total Software
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 234,101
Investment owned, percent of net assets	4.60%		4.60%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Technology & Services | Other Investments in Equity | Americas
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 307,491	[1],[3]
Investment owned, percent of net assets	6.10%	[1],[3]	6.10%	[1],[3]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Technology & Services | Other Investments in Equity | EMEA
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 20,000	[3]
Investment owned, percent of net assets	0.40%	[3]	0.40%	[3]
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Portfolio Companies | Technology & Services | Total Technology & Services
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 327,491
Investment owned, percent of net assets	6.50%		6.50%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Total Debt Investments (Cost $897,229 Americas, $274,631 EMEA, $17,235 Various, $6,242 APAC)
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 1,227,699
Investment owned, percent of net assets	24.30%		24.30%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Total Debt Investments | APAC
Schedule of Investments [Line Items]
Investment Owned, Cost	$ 6,242
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Total Debt Investments | Americas
Schedule of Investments [Line Items]
Investment Owned, Cost	897,229
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Total Debt Investments | EMEA
Schedule of Investments [Line Items]
Investment Owned, Cost	274,631
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Total Debt Investments | Various
Schedule of Investments [Line Items]
Investment Owned, Cost	17,235
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Total Investments (Cost $4,095,747)
Schedule of Investments [Line Items]
Investment Owned, Cost	4,095,747
Investment Owned, Fair Value	$ 4,369,696
Investment owned, percent of net assets	86.40%		86.40%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Total Portfolio Companies (Cost $1,757,204 Americas, $1,127,835 EMEA, $15,371 APAC)
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 3,141,997
Investment owned, percent of net assets	62.10%		62.10%
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Total Portfolio Companies | APAC
Schedule of Investments [Line Items]
Investment Owned, Cost	$ 15,371
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Total Portfolio Companies | Americas
Schedule of Investments [Line Items]
Investment Owned, Cost	1,757,204
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Investments | Total Portfolio Companies | EMEA
Schedule of Investments [Line Items]
Investment Owned, Cost	1,127,835
Investment, Identifier [Axis]: BXPE US Aggregator (CYM) L.P. | Total Investments, Investments in Affiliated Investee Funds, Cash and Cash Equivalents and Derivative Instruments (Cost $4,822,606)
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 5,128,713
Investment owned, percent of net assets	101.40%		101.40%
Investment, Identifier [Axis]: Investments | BXPE US Aggregator (CYM) L.P. (136,479,633 Units)
Schedule of Investments [Line Items]
investment owned, balance, shares | shares	136,479,633		136,479,633
Investment, Identifier [Axis]: Investments | BXPE US Aggregator (CYM) L.P. | Investee Fund | Various | Various
Schedule of Investments [Line Items]
Investment Owned, Fair Value	$ 3,718,151
Investment owned, percent of net assets	102.60%		102.60%
Investment, Identifier [Axis]: Investments | Total Investments (Cost $3,477,391)
Schedule of Investments [Line Items]
Investment Owned, Cost	$ 3,477,391
Investment Owned, Fair Value	$ 3,718,151
Investment owned, percent of net assets	102.60%		102.60%
BXPE US Aggregator (CYM) L.P [Member]
Schedule of Investments [Line Items]
Investment Owned, Cost	$ 4,095,747
Investment Owned, Fair Value	4,369,696				0
Cash and Cash Equivalents	72,702				$ 0
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%		5%
[1]There were no single investments included in this category that exceeded 5% of net assets of BXPE US Aggregator (CYM) L.P., Blackstone Private Equity Strategies Fund L.P. and Blackstone Private Equity Strategies Fund (TE) L.P.[2]Debt includes different forms of interests that represent a creditor relationship with an investee, including but not limited to (i) bank loans, (ii) interests in collateralized loan obligations (“CLOs”) and (iii) direct lending debt investments.[3]Equity includes different forms of interests and rights and obligations that represent ownership in an entity or the right to acquire or dispose of ownership in an entity, including but not limited to (i) common equity, (ii) preferred equity and (iii) other equity-linked securities.

Organization

Organization	9 Months Ended
	Sep. 30, 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 limited partnership units (“Units”) 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, 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 Equity 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,” but are operated as distinct investment structures. BXPE’s investment objectives are to deliver medium- to long-term capital appreciation and, to a lesser extent, generate modest current income. BXPE seeks to meet its investment objectives by investing primarily in privately negotiated, equity-oriented investments, leveraging the talent and investment capabilities of Blackstone Inc.’s (“Blackstone”) private equity platform to create an attractive portfolio of alternative investments diversified across geographies and sectors. Investment operations commenced on January 2, 2024 when BXPE U.S. and the Feeder first sold unregistered limited partnership 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 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 Equity 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,” but are operated as distinct investment structures. BXPE’s investment objectives are to deliver medium- to long-term capital appreciation and, to a lesser extent, generate modest current income. BXPE seeks to meet its investment objectives by investing primarily in privately negotiated, equity-oriented investments, leveraging the talent and investment capabilities of Blackstone Inc.’s (“Blackstone”) private equity platform to create an attractive portfolio of alternative investments diversified across geographies and sectors. Investment operations commenced on January 2, 2024 when BXPE U.S. and the Feeder sold unregistered limited partnership 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	9 Months Ended
	Sep. 30, 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., see the Aggregator’s condensed consolidated financial statements included following these condensed financial statements and 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 Gain (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 investors 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. Affiliates The General Partner, Investment Manager, Dealer Manager (as defined in Note 6. “Related Party Transactions”), the Feeder, Parallel Funds, the Aggregator, BXPE Lux and other vehicles sponsored, advised and/or managed by Blackstone or its affiliates are affiliates of BXPE U.S.
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 a) an investment company or b) an 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 Topic 820, 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, certain convertible securities and certain over-the-counter ● 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 or Unaffiliated 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. Derivative Instruments are valued based on contractual cash flows and observable inputs generally comprising of yield curves and foreign currency rates. 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, perform ance of Derivative Instruments The Aggregator recognizes derivative instruments as assets or liabilities at fair value in its Condensed Consolidated Statements of Assets and Liabilities as Derivative Assets at Fair Value and Derivative Liabilities at Fair Value, respectively. The Aggregator recognizes changes in fair value of derivative instruments in current period earnings. For derivative financial positions that are closed or that mature during a reporting period, the Aggregator recognizes realized gains or losses equal to the difference between the value of the contract at the time it was opened and the value of the contract at the time it is closed. Realized gains and losses are presented net in Net Realized Gain (Loss) on Derivative Instruments on the Condensed Consolidated Statements of Operations. Changes in the value of contracts that remain outstanding as of period end are measured based on the difference between the unrealized balance as of the beginning of the reporting period and the unrealized balance as of the end of the reporting period, net of any reversals of previously recorded unrealized gains or losses once realized. Unrealized gains and losses are presented net in Net Change in Unrealized Gain (Loss) on Derivative Instruments on the Condensed Consolidated Statements of Operations. The Aggregator has elected to not offset derivative assets and liabilities in its Condensed Consolidated Statements of Assets and Liabilities, including cash, that may be received or paid as part of collateral arrangements, even when an enforceable master netting agreement is in place that provides the Aggregator, in the event of counterparty default, the right to liquidate collateral and the right to offset a counterparty’s rights and obligations. The Aggregator’s other disclosures regarding derivative instruments are discussed in Note 4. “Derivative Instruments.” 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 7. “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 expenses are reported in Deferred Offering Costs Amortization on the Condensed Consolidated Statements of Operations. Management Fees Waived The Investment Manager agreed to waive the Management Fee (as defined in Note 7. “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, which was January 2, 2024. The Investment Manager, at its discretion, did not extend the Management Fee waiver. The waived Management Fees are reported in Management Fees Waived on the Condensed Consolidated Statements of Operations. As described in the Investment Management Agreement (as defined in Note 7. “Related Party Transactions”), the Management Fee shall be reduced (but not below zero) by an amount equal to the respective unitholder’s pro rata share of 100% of the net break-up, 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 7. “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 7. “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 investors 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. Affiliates The General Partner, Investment Manager, Blackstone Securities Partners L.P. (the “Dealer Manager”), BXPE U.S., the Feeder, Parallel Funds, BXPE Lux and other vehicles sponsored, advised and/or managed by Blackstone or its affiliates are affiliates of the Aggregator. 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	9 Months Ended
	Sep. 30, 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 73.5% in the Aggregator as of September 30, 2024. The remaining interest in the Aggregator is held by a Parallel Fund. BXPE U.S.’s interest in the Aggregator may result in BXPE U.S. indirectly holding investments of the Aggregator that, on a proportional basis, at times may exceed 5% of the net assets of BXPE U.S. For a listing of investments that may proportionally exceed 5% of BXPE U.S. net assets, see the Condensed Consolidated Schedule of Investments of BXPE US Aggregator (CYM) L.P.

Investments and Fair Value Meas

Investments and Fair Value Measurement	9 Months Ended
	Sep. 30, 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 September 30, 2024: September 30, 2024 Level I Level II Level III NAV Total Assets Cash and Cash Equivalents Cash Held at Banks  $ 11,170    $ —    $ —    $ —    $ 11,170   Money Market Fund 61,532 — — — 61,532 Total Cash and Cash Equivalents 72,702 — — — 72,702 Investments Portfolio Companies — — 3,077,035 64,962 3,141,997 Debt Investments — 756,749 470,950 — 1,227,699 Total Investments — 756,749 3,547,985 64,962 4,369,696 Investments in Affiliated Investee Funds — — 204,907 510,191 715,098  $ 72,702  $ 756,749  $ 3,752,892  $ 575,153  $ 5,157,496 Liabilities Derivative Liabilities  $ —  $ 28,783  $ —  $ —  $ 28,783 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 September 30, 2024: Fair Value Valuation Techniques Unobservable Inputs Ranges Weighted- Impact to Financial Assets Investments Portfolio Companies  $ 2,970,493 Discounted Cash Flows  WACC 10.3% - 33.8% 17.4% Lower Exit Multiple 7.6x - 22.0x 16.1x Higher 40,478 Market Approach Performance Multiple 31.5x 31.5x Higher 66,064 Transactional Value n/a Debt Investments 452,986 Discounted Cash Flows WACC 8.3% - 15.2% 14.3% Lower 17,964 Third Party Pricing n/a Total Investments 3,547,985 Investments in Affiliated Investee Funds 204,907 Third Party Pricing n/a  $ 3,752,892 n/a Not applicable. WACC Weighted-Average Cost of Capital. Exit Multiple Ranges include the last twelve months EBITDA multiples and the next twelve months forward EBITDA multiples. Third Party Pricing Third Party Pricing is generally determined on the basis of unadjusted prices between market participants provided by reputable dealers or pricing services. For the three and nine months ended September 30, 2024, the following tables present 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 September 30, 2024 Affiliated Portfolio Debt Investee Companies Investments Funds Total Balance, Beginning of Period  $ 1,567,924    $ 106,740    $ 200,208    $ 1,874,872   Purchases 1,297,247 393,760 — 1,691,007 Sales and Proceeds from Investments (8,891 ) (9,218 ) — (18,109 ) Transfer Out of Level III (a) — (1,820 ) — (1,820 ) Change in Gain (Loss) Included in Net Assets 220,755 (18,512 ) 4,699 206,942 Balance, End of Period  $ 3,077,035  $ 470,950  $ 204,907  $ 3,752,892 Changes in Unrealized Gain (Loss) Included in Earnings Related to Financial Assets Still Held at the Reporting Date  $ 220,755  $ (18,512 )  $ 4,699  $ 206,942 Level III Financial Assets at Fair Value Nine Months Ended September 30, 2024 Affiliated Portfolio Debt Investee Companies Investments Funds Total Balance, Beginning of Period  $ —  $ —  $ —  $ — Purchases 2,865,691   443,366 194,133   3,503,190   Sales and Proceeds from Investments (8,891 ) (11,106 ) — (19,997 ) Transfer Into Level III (b) — 51,535 — 51,535 Transfer Out of Level III (a)(b) (49,538 ) (1,820 ) — (51,358 ) Change in Gain (Loss) Included in Net Assets 269,773 (11,025 ) 10,774 269,522 Balance, End of Period  $ 3,077,035  $ 470,950  $ 204,907  $ 3,752,892 Changes in Unrealized Gain (Loss) Included in Earnings Related to Financial Assets Still Held at the Reporting Date  $ 269,773  $ (11,025 )  $ 10,774  $ 269,522 (a) For the three months ended September 30, 2024, the transfers out of Level III financial assets were due to changes in the observability of inputs used in the valuation of such assets. (b) For the nine months ended September 30, 2024, the transfers in and out of Level III financial assets were primarily due to a Level III Portfolio Companies investment transferring into Level III Debt Investments. Investments in Affiliated 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 September 30, 2024, a majority of these investments may not 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 Affiliated Investee Funds by Strategy Unfunded Fair Value Secondaries Other Investment(s) in Affiliated Investee Funds  $ 118,859    $ 197,747   118,859 197,747 Specialty Finance Blackstone CLO Management LLC – Series 9 — 291,496 Other Investment(s) in Affiliated Investee Funds 65,316 225,855 65,316 517,351  $ 184,175  $ 715,098 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 Gain (Loss) on Investments in affiliated Investee Funds is $18.9 million and $60.9 million for the three and nine months ended September 30, 2024, respectively. Net realized gains (losses) on investments in affiliated Investee Funds was $0.1 million for the nine months ended September 30, 2024. There was no Net realized gains (losses) on investments in affiliated Investee Funds for the three months ended September 30, 2024. Refer to Note 7. “Related Party Transactions” for more detail on investments in affiliated Investee Funds.

Line of Credit Agreement

Line of Credit Agreement	9 Months Ended
	Sep. 30, 2024
Short-Term Debt [Line Items]
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 (as amended, the “A&R Line of Credit”) with Blackstone Holdings Finance Co. L.L.C. (“Finco”) providing up to a maximum amount of $300.0 millio n connection with the Aggregator Credit Agreement (as defined in Note 5. “Borrowings — Aggregator Credit Agreement” in the “Notes to Condensed Consolidated Financial Statements” of BXPE US Aggregator (CYM) L.P.). The A&R Line of Credit was renewed for an additional one-year 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 pre-payment
BXPE US Aggregator CYM L P [Member]
Short-Term Debt [Line Items]
Line of Credit Agreement	5. Borrowings A&R Line of Credit On August 8, 2024, the Aggregator executed a joinder to the amended and restated unsecured, uncommitted line of credit agreement, dated as of November 3, 2023, among Blackstone Holdings Finance Co. L.L.C. (“Finco”) and the borrowers thereunder (as amended, the “A&R Line of Credit”) and became a borrower thereunder. For a discussion of the terms of the A&R Line of Credit, see Note 4. “Line of Credit Agreement” in the “Notes to Condensed Financial Statements” of Blackstone Private Equity Strategies Fund L.P. In connection with the Aggregator Credit Agreement (as defined below), on October 3, 2024, the Aggregator was released as a borrower under the A&R Line of Credit. As of September 30, 2024, the Aggregator had no borrowings or amounts outstanding under the A&R Line of Credit. Bonavista Credit Facility On July 25, 2024, Bonavista Funding Ltd. (“Bonavista”), a consolidated wholly-owned subsidiary of the Aggregator that holds broadly syndicated loans, entered into a revolving credit agreement (the “Bonavista Credit Facility”) pursuant to which the lenders thereunder agreed to provide loans for an aggregate principal amount not to exceed $300.0 million, subject to customary conditions. The Bonavista Credit Facility is collateralized by assets of Bonavista. The obligations under the Bonavista Credit Facility have limited recourse, with repayment solely from the assets collateralizing Bonavista. The liabilities of Bonavista do not have recourse to the general credit of the Aggregator. The parties to the Bonavista Credit Facility include Bonavista, as borrower, the Aggregator, a third party administrative agent (in such capacity, the “Bonavista Administrative Agent”), also serving as sole lead arranger and sole book manager, and the other third party lenders as identified in the Bonavista Credit Facility. The Bonavista Credit Facility matures on July 27, 2026, and may not be extended. Upon an event of default, the Bonavista Administrative Agent may also terminate its commitment. Under the Bonavista Credit Facility, borrowings denominated in U.S. dollars will bear interest, at the borrower’s discretion, at a rate of the (a) one-month Bonavista Administrative Agent without a premium or penalty, subject to certain conditions. The Bonavista Credit Facility is subject to a commitment fee that is generally calculated based on two components, the “First Unused Amount” and “Second Unused Amount” (as defined below). The First Unused Amount incurs no commitment fee for the first nine months the Bonavista Credit Facility is outstanding; thereafter, the commitment fee on the First Unused Amount is generally equal to (a) a varying percentage of the unused aggregate commitment amount, less total borrowings outstanding, multiplied by (b) 1%. T ) 0.3%; thereafter, the commitment fee on the Second Unused Amount is generally equal to (a) a varying percentage of the unused aggregate commitment amount, less total borrowings outstanding, multiplied by (b) 0.3%. As of September 30, 2024, Bonavista had no borrowings or amounts outstanding under the Bonavista Credit Facility. Aggregator Credit Agreement On October 3, 2024, the Aggregator entered into a revolving credit agreement (the “Aggregator Credit Agreement”) pursuant to which multiple third party lenders and letter of credit issuers thereunder agreed to provide loans and letters of credit for up to an aggregate initial commitment of $375.0 million, subject to customary conditions. The available capacity under the Aggregator Credit Agreement may be increased on a permanent or a temporary basis up to an amount agreed by the Joint Lead Arrangers (as defined below) and the increasing lenders, provided that the Aggregator may not incur new loans or letters of credit in excess of the applicable loan to value ratio (which may be between 10% and 20%) and maintains a loan to value ratio of not more than 30%, where value equals the sum of the adjusted net asset values of eligible investments and certain other items (as specified in the Aggregator Credit Agreement). On October 31, 2024, the aggregate commitment was increased by $300.0 million to $675.0 million. The parties to the Aggregator Credit Agreement include the Aggregator, as borrower, a third party administrative agent (in such capacity, the “Aggregator Administrative Agent”), third party joint lead arrangers (in such capacities, the “Joint Lead Arrangers”) and co-structuring agents, and certain other lenders and the letter of credit issuers as identified in the Aggregator Credit Agreement. The Aggregator Credit Agreement matures on October 1, 2027, subject to a one-year extension option requiring approval by the Aggregator Administrative Agent and extending lenders and the satisfaction of customary conditions. Under the Aggregator Credit Agreement, borrowings denominated in U.S. dollars will bear interest, at the Aggregator’s discretion, at a rate of the (a) one-month is generally based on (a) the total facility commitments, less total borrowings outstanding, multiplied by (b) the commitment fee rate. The unused commitment fee per annum rate varies from 0.50% to 0.70% and is dependent on the total borrowings outstanding. Under the Aggregator Credit Agreement, the Aggregator will bear customary expenses for a credit facility of this size and type, including closing fees, arrangement fees, administration fees and unused fees. The Aggregator Credit Agreement contains customary representations and warranties, events of default, cash sweep events and affirmative and negative covenants. The Aggregator’s obligations under the Aggregator Credit Agreement are non-recourse

Derivative Instruments

Derivative Instruments	9 Months Ended
	Sep. 30, 2024
BXPE US Aggregator CYM L P [Member]
Derivative Instruments	4. Derivative Instruments In the normal course of business, the Aggregator may enter into derivative contracts to achieve certain risk management objectives. The Aggregator may enter into derivative instruments to hedge against foreign currency exchange rate risk on a portion or all of its non-U.S. As a result of the use of derivative contracts, the Aggregator is exposed to the risk that counterparties will fail to fulfill their contractual obligations. To mitigate such counterparty risk, the Aggregator enters into contracts with certain major financial institutions, all of which have investment grade ratings. Counterparty credit risk is evaluated in determining the fair value of derivative instruments. The table below summarizes the aggregate notional amount and fair value of the derivative instruments. The notional amount represents the absolute value amount of the foreign exchange contracts: September 30, 2024 December 31, 2023 Liabilities Liabilities Fair Fair   Notional   Value Notional Value Derivative Instruments Foreign Currency Contracts (EUR)   €  495,000   $  20,416    €    —   $    —  Foreign Currency Contracts (GBP)  £ 61,967  8,368   £ —  —  The table below summarizes the impact to the Condensed Consolidated Statements of Operations from derivative instruments: Three Months Ended Nine Months Ended September 30, September 30, 2024 2023 2024 2023 Derivative Instruments Realized Gain Foreign Currency Contracts  $   3,578  $    —  $   3,578  $   — Net Change in Unrealized Gain (Loss) Foreign Currency Contracts (31,720 ) — (28,783 ) —  $ (28,142 )  $ —  $ (25,205 )  $   — As of September 30, 2024 and December 31, 2023, the Aggregator had not designated any derivatives as fair value, cash flow or net in ves

Net Assets

Net Assets	9 Months Ended
	Sep. 30, 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”). The key differences among each Unit Class relate to the ongoing servicing fees and the upfront subscription fee. The term “Transactional NAV” refers to the price at which transactions in BXPE U.S. are made, calculated in accordance with a valuation policy that has been approved by the Board of Directors. The purchase price per Unit of each Class is equal to the Transactional NAV per Unit for such Class as of the last calendar day of the immediately preceding month. Before BXPE U.S. determined its first Transactional NAV, the initial subscription price for Units was $25.00 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, BXPE U.S.’s Transactional NAV is based on the month-end values of investments, the addition of the value of any other assets such as cash, the deduction of any liabilities and the deduction of expenses attributable to certain Unit Classes, such as applicable servicing fees. 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 The following table presents transactions in the Units during the three and nine months ended September 30, 2024 and 2023: Class S Units Class D Units Class I Units Total Units Outstanding as of June 30, 2023 and September 30, 2023 — — 4,000 4,000 Units Outstanding as of June 30, 2024 48,916,722 1,874,867 63,954,404 114,745,993  Units Issued 7,854,107 408,745 13,961,933 22,224,785  Conversion of Units Between Classes (345,580 ) (60,000 ) 403,739 (1,841 )  Repurchase of Units (24,000 ) — (49,400 ) (73,400 ) Units Outstanding as of September 30, 2024  56,401,249  2,223,612  78,270,676  136,895,537 Class S Units Class D Units Class I Units Total Units Outstanding as of December 31, 2022 and September 30, 2023 — — 4,000 4,000 Units Outstanding as of December 31, 2023 — — 4,000 4,000  Units Issued 56,928,443 2,283,612 77,755,281 136,967,336  Conversion of Units Between Classes (503,194 ) (60,000 ) 560,795 (2,399 )  Repurchase of Units (24,000 ) — (49,400 ) (73,400 ) Units Outstanding as of September 30, 2024  56,401,249  2,223,612  78,270,676  136,895,537 Repurchase Program BXPE U.S. has implemented a repurchase program (the “Repurchase Program”) in which it intends to offer 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 been outstanding for fewer than During the three and nine months ended September 30, 2024, 73,400 Units were repurchased.
BXPE US Aggregator (CYM) L.P [Member]
Net Asset [Line Items]
Net Assets	6. 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 (each, an “Aggregator Unit”). No Class B Units have been issued by the Aggregator since inception. As of September 30, 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 Aggregator 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 Aggregator Unit. The Aggregator’s 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, the deduction of any liabilities, the accrual and allocation of the Management Fee, Administration Fee and the Performance Participation Allocation (each as defined below) and the deduction of expenses. Aggregator Unit issuances related to monthly contributions are effective the first calendar day of each month. Aggregator Units are issued at a price per Aggregator Unit equivalent to the Aggregator’s most recent Transactional NAV per Aggregator Unit available for Class A Units, which is the Aggregator’s prior month-end The following table presents transactions in the Aggregator’s Units during the three and nine months ended September 30, 2024 and 2023: Class A Units Total Units Outstanding as of June 30, 2023 and September 30, 2023 — — Units Outstanding as of June 30, 2024 158,901,585 158,901,585 Units Issued 26,987,238   26,987,238   Repurchase of Units (177,523 ) (177,523 ) Units Outstanding as of September 30, 2024  185,711,300  185,711,300 Class A Units Total Units Outstanding as of December 31, 2022 and September 30, 2023 — — Units Outstanding as of December 31, 2023 — — Units Issued 185,888,823   185,888,823   Repurchase of Units (177,523 ) (177,523 ) Units Outstanding as of September 30, 2024  185,711,300  185,711,300 In accordance with the Aggregator Partnership Agreement, the General Partner can cause the Aggregator to offer to repurchase Aggregator Units from limited partners to match any repurchase offers made by BXPE U.S. and any Parallel Fund. Any repurchase of Aggregator 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 Aggregator Units repurchased by the Aggregator only with the consent of BXPE U.S., including, if applicable, approval by the Board of Directors. During the three months and nine months ended September 30, 2024, 177,523 Aggregator Units were repurchased.

Related Party Transactions

Related Party Transactions	9 Months Ended
	Sep. 30, 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. Partnership Agreement”) with the General Partner. Under the terms of the BXPE U.S. Partnership Agreement, overall responsibility for BXPE U.S.’s oversight rests with the General Partner, subject to certain oversight rights held by the Board of Directors. Performance Participation Allocation The General Partner receives a performance participation allocation (“Performance Participation Allocation”) by BXPE U.S. (indirectly through the Aggregator). Investors in the Feeder, BXPE U.S. and any Parallel Funds indirectly bear a portion of the Performance Participation Allocation paid by the Aggregator (indirectly through the Aggregator’s consolidated subsidiaries), but such expenses are not duplicated at the Feeder, BXPE U.S. or Parallel Funds. For the three and nine months ended September 30, 2024, BXPE U.S. was allocated $20.2 million and $36.4 million of the Performance Participation Allocation recognized by the Aggregator, respectively. Refer to the Aggregator’s condensed consolidated financial statements included following these condensed financial statements for more information regarding the Performance Participation Allocation. 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 any Parallel Funds will indirectly bear a portion of the Management Fee paid by the Aggregator, but such expenses will not be duplicated at the Feeder, BXPE U.S. or Parallel Funds. The Investment Manager 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, at its discretion, did not extend the Management Fee waiver. Effective July 1, 2024, the Aggregator began accruing the Management Fee attributable to BXPE U.S. The Management Fee is included as a component of Net Change in Unrealized Gain (Loss) on Investments Allocated from BXPE US Aggregator (CYM) L.P. in the Condensed Statements of Operations. Refer to the Aggregator’s condensed consolidated financial statements included following these condensed financial statements for more information regarding the Management Fee. For the three and nine months ended September 30, 2024, BXPE U.S. was allocated $10.9 million and $24.5 million of the gross Management Fee recognized by the Aggregator, respectively, of which $13.5 million was waived by the Investment Manager for the nine months ended September 30, 2024. No Management Fee was waived for the three months ended September 30, 2024 . Administration Fee The Investment Manager and its affiliates provide administration services to BXPE, consistent with the BXPE U.S. 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 BXPE U.S. (indirectly through the Aggregator). Investors in the Feeder, BXPE U.S. and any Parallel Funds indirectly bear a portion of the Administration Fee, paid by the Aggregator, but such expenses are not duplicated at the Feeder, BXPE U.S. or Parallel Funds. For the three and nine months ended September 30, 2024, BXPE U.S. was allocated $0.9 million and $2.0 million of the Administration Fee recognized by the Aggregator, respectively. Refer to the Aggregator’s condensed consolidated financial statements included following these condensed financial statements for more information regarding the Administration Fee. 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 are no 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. Servicing Fees Payable as of September 30, 2024 was $92.4 million. 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 are operated as distinct investment structures.
BXPE US Aggregator CYM L P [Member]
Related Party Transactions	7. 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 12.5% of total return subject to a 5% annual hurdle amount and a high water mark with 100% catch-up. pro-rating For the three and nine months ended September 30, 2024, the Aggregator accrued unrealized Performance Participation Allocation of $27.7 million and $48.5 million, respectively. 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, sub-advisory 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 1.25% 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 Class D/D-TE The Investment Manager may elect to receive the Management Fee in cash, the Aggregator’s, BXPE U.S.’s, the Feeder’s, or the Parallel Fund’s units and/or equity 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 agreed to waive the Management Fee 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, which was January 2, 2024. The Investment Manager, at its discretion, did not extend the Management Fee waiver. As of July 1, 2024, Management Fees may be offset by certain fees paid to the Investment Manager or its affiliates in connection with BXPE’s investments. These fees, when recognized, are presented as Management Fees Waived. Refer to Note 2, “Summary of Significant Accounting Policies” for more information on management fee waivers. For the three and nine months ended September 30, 2024, the Aggregator accrued gross Management Fees of $15.1 million and $32.0 million, respectively, of which $16.9 million was waived by the Investment Manager for the nine months ended September 30, 2024. No Management Fee was waived for the three months ended September 30, 2024. 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, 0.10% of the From time to time, the Investment Manager may outsource certain administrative duties provided to BXPE with respect to the Administration Fee to third parties. The fees, costs and expenses of any such third party service providers will be payable by the Investment Manager out of its Administration Fee such that the Administration Fee should not exceed, in the aggregate, 0.10% of the Aggregator’s Transactional NAV. For the three and nine months ended September 30, 2024, the Aggregator accrued Administration Fees of $1.2 million and $2.6 million, respectively. Investments in Affiliated Investee Funds The Aggregator has investments in certain Blackstone-affiliated investment funds (“Investments in Affiliated Investee Funds”). As of September 30, 2024, the Aggregator had Investments in Affiliated Investee Funds of $715.1 million. Refer to Note 2. “Summary of Significant Accounting Policies” for more information on Investments in Affiliated Investee Funds. Expense Support For the nine months ended September 30, 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 nine months ended September 30, 2024, the Aggregator accrued Expense Support of $0.2 million that will be paid by the Investment Manager. There was no accrued Expense Support for the three months ended September 30, 2024. 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. Due to Affiliates Due to Affiliates is comprised of cash advances made by 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. Related Party Transactions BXPE may from time to time enter into transactions with certain affiliates. In addition to the eleven investments purchased on January 2 , 2024 for an aggregate purchase price of $305.3 million pursuant to the A&R Warehousing Agreement (as defined in Note 8. “Warehousing Agreement” in the “Notes to Condensed Financial Statements” of Blackstone Private Equity Strategies Fund L.P.), during the three and nine months ended September 30, 2024, the Aggregator purchased two investments for an aggregate purchase price of $354.3 million from other entities or vehicles controlled, sponsored, advised and/or managed by Blackstone or its affiliates. As part of BXPE’s investment strategy, the Aggregator participates in investments alongside other vehicles sponsored, advised and/or managed by Blackstone or its affiliates in a programmatic manner through elections to Blackstone’s side-by-side investment program. As a participant in the program, from time to time, the Aggregator and other vehicles sponsored, advised and/or managed by Blackstone or its affiliates may sell or syndicate portions of an investment to a related party, including co-investment vehicles managed by Blackstone (including co-investment vehicles managed outside of the sponsor’s investment program). Such syndication transactions are generally made in the first six months of ownership and are effected at cost, plus a fee for the time the investment is held by the Aggregator. During the three and nine months ended September 30, 2024, the Aggregator syndicated portions of six and seven investments, respectively, for an aggregate sale price of $13.7 million and $21.5 million, respectively, to related parties.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 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.” 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 September 30, 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 as of September 30, 2024.
BXPE US Aggregator (CYM) L.P [Member]
Commitments And Contingencies Disclosure [Line Items]
Commitments and Contingencies	8. Commitments and Contingencies Commitments The Investment Manager agreed to advance organizational and offering expenses, other than servicing fees related to Class S/S-TE Class D/D-TE As of September 30, 2024, the Aggregator had unfunded commitments to existing investments of $611.4 million and the BXPE Fund Program had additional conditional commitments of $1.2 billion 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 September 30, 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 as of September 30, 2024.

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2024
BXPE US Aggregator CYM L P [Member]
Income Tax Examination [Line Items]
Income Taxes	9. Income Taxes The Aggregator’s Provision for Taxes were $11.2 million and $13.5 million for the three and nine months ended September 30, 2024, respectively, which resulted in effective tax rates of 5.8% and 4.1%, respectively. For the three and nine months ended September 30, 2024, the primary driver giving rise to the difference between the 0.0% federal statutory rate applicable to partnerships and the effective tax rate was U.S. federal, state and/or local taxes on income from the Aggregator Corporations.

Warehousing Agreement

Warehousing Agreement	9 Months Ended
	Sep. 30, 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 the Aggregator and BXPE Lux acquired on each Warehouse Closing Date. Finco provided committed funding for Approved Warehoused Investments until the applicable Warehouse Closing Date. The A&R Warehousing Agreement expired on November 2, 2024, and was not renewed. 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, which totaled $1.2 million for the purchase of the investments and commitments on January 2, 2024. The fee accrued is reported in Warehousing Fees and the waived interest is reported in Warehousing Fees Waived on the Condensed Statements of Operations. As of September 30, 2024, no amounts were outstanding.

Financial Highlights

Financial Highlights	9 Months Ended
	Sep. 30, 2024
Investment Company, Financial Highlights [Line Items]
Financial Highlights	9. Financial Highlights The following financial highlights for the nine months ended September 30, 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 nine months ended September 30, 2023. Nine Months Ended September 30, 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 Loss (0.02 ) (0.02 ) (0.02 ) Net Change in Unrealized Gain (Loss) on Investments Allocated from BXPE US Aggregator (CYM) L.P. 2.23 2.23 2.24 Net Increase in Net Assets Resulting from Investment Operations 2.21 2.21 2.22 Servicing Fees (1.76 ) (0.53 ) — Net Increase in Net Assets 0.45 1.68 2.22 Net Asset Value, End of Period  $ 25.45  $ 26.68  $ 27.22 Units Outstanding, End of Period 56,401,249 2,223,612 78,270,676 Total Return Based on Net Asset Value (a) 1.80 % 6.72 % 8.88 % Ratios to Weighted-Average Net Assets (Non-Annualized) Expenses without Waivers (b) 0.12 % 0.14 % 0.12 % Warehousing Fees Waivers -0.04 % -0.05 % -0.05 % Total Expenses 0.08 % 0.09 % 0.07 % Net Investment Loss -0.08 % -0.09 % -0.07 % (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 initial Net Asset Value per Unit of $25.00. 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	10. Financial Highlights The following financial highlights for the nine months ended September 30, 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 inception Nine Months Ended September 30, 2024 Class A Units Per Unit Data Net Asset Value, Beginning of Period  $ — Proceeds from Units Issued 25.00 Net Investment Income 0.27 Net Realized and Unrealized Gain (Loss) on Investments, Derivative Instruments and Translation of Assets and Liabilities in Foreign Currencies 1.97 Net Increase in Net Assets 2.24 Net Asset Value, End of Period  $ 27.24 Units Outstanding, End of Period 185,711,300 Total Return Based on Net Asset Value (a) 8.96 % Ratios to Weighted-Average Net Assets (Non-Annualized) Expenses without Waivers (b) 1.62 % Expenses and Management Fees Waivers (b) -0.51 % Accrued Performance Participation Allocation 1.44 % Total Expenses 2.55 % Net Investment Income 0.38 % (a) Total return is calculated as the change in Net Asset Value per Aggregator Unit during the period, plus distributions per Aggregator Unit (assuming dividends and distributions are reinvested in accordance with the Aggregator’s distribution reinvestment plan) divided by the initial Net Asset Value per Aggregator Unit of $25.00. 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	9 Months Ended
	Sep. 30, 2024
Subsequent Event [Line Items]
Subsequent Events	10. Subsequent Events On October 25, 2024, BXPE U.S. extended the A&R Line of Credit with Finco by one year. The agreement expires on November 4, 2025. For additional information see Note 4. “Line of Credit Agreement.”
BXPE US Aggregator (CYM) L.P [Member]
Subsequent Event [Line Items]
Subsequent Events	11. Subsequent Events The Aggregator has evaluated the impact of all subsequent events through November 13, 2024, which is the date that these condensed consolidated financial statements were available to be issued, and except as noted below, has determined that there were no subsequent events requiring adjustment to or disclosure in the condensed consolidated financial statements. Aggregator Credit Agreement On October 3, 2024, the Aggregator entered into a revolving credit agreement with third party lenders and letter of credit issuers. See Note 5. “Borrowings” for more information.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 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., see the Aggregator’s condensed consolidated financial statements included following these condensed financial statements and 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 Gain (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 investors 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.
Affiliates	Affiliates The General Partner, Investment Manager, Dealer Manager (as defined in Note 6. “Related Party Transactions”), the Feeder, Parallel Funds, the Aggregator, BXPE Lux and other vehicles sponsored, advised and/or managed by Blackstone or its affiliates are affiliates of BXPE U.S.
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 a) an investment company or b) an 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 Topic 820, 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, certain convertible securities and certain over-the-counter ● 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 or Unaffiliated Investee Funds	Investments at Fair Value and Investments in Affiliated or Unaffiliated 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. Derivative Instruments are valued based on contractual cash flows and observable inputs generally comprising of yield curves and foreign currency rates. 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, perform ance of
Derivative Instruments	Derivative Instruments The Aggregator recognizes derivative instruments as assets or liabilities at fair value in its Condensed Consolidated Statements of Assets and Liabilities as Derivative Assets at Fair Value and Derivative Liabilities at Fair Value, respectively. The Aggregator recognizes changes in fair value of derivative instruments in current period earnings. For derivative financial positions that are closed or that mature during a reporting period, the Aggregator recognizes realized gains or losses equal to the difference between the value of the contract at the time it was opened and the value of the contract at the time it is closed. Realized gains and losses are presented net in Net Realized Gain (Loss) on Derivative Instruments on the Condensed Consolidated Statements of Operations. Changes in the value of contracts that remain outstanding as of period end are measured based on the difference between the unrealized balance as of the beginning of the reporting period and the unrealized balance as of the end of the reporting period, net of any reversals of previously recorded unrealized gains or losses once realized. Unrealized gains and losses are presented net in Net Change in Unrealized Gain (Loss) on Derivative Instruments on the Condensed Consolidated Statements of Operations. The Aggregator has elected to not offset derivative assets and liabilities in its Condensed Consolidated Statements of Assets and Liabilities, including cash, that may be received or paid as part of collateral arrangements, even when an enforceable master netting agreement is in place that provides the Aggregator, in the event of counterparty default, the right to liquidate collateral and the right to offset a counterparty’s rights and obligations. The Aggregator’s other disclosures regarding derivative instruments are discussed in Note 4. “Derivative Instruments.”
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 7. “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 expenses are reported in Deferred Offering Costs Amortization on the Condensed Consolidated Statements of Operations.
Management Fees Waived	Management Fees Waived The Investment Manager agreed to waive the Management Fee (as defined in Note 7. “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, which was January 2, 2024. The Investment Manager, at its discretion, did not extend the Management Fee waiver. The waived Management Fees are reported in Management Fees Waived on the Condensed Consolidated Statements of Operations. As described in the Investment Management Agreement (as defined in Note 7. “Related Party Transactions”), the Management Fee shall be reduced (but not below zero) by an amount equal to the respective unitholder’s pro rata share of 100% of the net break-up,
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 7. “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 7. “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 investors 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.
Affiliates	Affiliates The General Partner, Investment Manager, Blackstone Securities Partners L.P. (the “Dealer Manager”), BXPE U.S., the Feeder, Parallel Funds, BXPE Lux and other vehicles sponsored, advised and/or managed by Blackstone or its affiliates are affiliates of the Aggregator.
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]	9 Months Ended
	Sep. 30, 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 September 30, 2024: September 30, 2024 Level I Level II Level III NAV Total Assets Cash and Cash Equivalents Cash Held at Banks  $ 11,170    $ —    $ —    $ —    $ 11,170   Money Market Fund 61,532 — — — 61,532 Total Cash and Cash Equivalents 72,702 — — — 72,702 Investments Portfolio Companies — — 3,077,035 64,962 3,141,997 Debt Investments — 756,749 470,950 — 1,227,699 Total Investments — 756,749 3,547,985 64,962 4,369,696 Investments in Affiliated Investee Funds — — 204,907 510,191 715,098  $ 72,702  $ 756,749  $ 3,752,892  $ 575,153  $ 5,157,496 Liabilities Derivative Liabilities  $ —  $ 28,783  $ —  $ —  $ 28,783
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 September 30, 2024: Fair Value Valuation Techniques Unobservable Inputs Ranges Weighted- Impact to Financial Assets Investments Portfolio Companies  $ 2,970,493 Discounted Cash Flows  WACC 10.3% - 33.8% 17.4% Lower Exit Multiple 7.6x - 22.0x 16.1x Higher 40,478 Market Approach Performance Multiple 31.5x 31.5x Higher 66,064 Transactional Value n/a Debt Investments 452,986 Discounted Cash Flows WACC 8.3% - 15.2% 14.3% Lower 17,964 Third Party Pricing n/a Total Investments 3,547,985 Investments in Affiliated Investee Funds 204,907 Third Party Pricing n/a  $ 3,752,892 n/a Not applicable. WACC Weighted-Average Cost of Capital. Exit Multiple Ranges include the last twelve months EBITDA multiples and the next twelve months forward EBITDA multiples. Third Party Pricing Third Party Pricing is generally determined on the basis of unadjusted prices between market participants provided by reputable dealers or pricing services.
Summary of Fair Value Assets Measured on Recurring Basis Unobservable Input Reconciliation	For the three and nine months ended September 30, 2024, the following tables present 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 September 30, 2024 Affiliated Portfolio Debt Investee Companies Investments Funds Total Balance, Beginning of Period  $ 1,567,924    $ 106,740    $ 200,208    $ 1,874,872   Purchases 1,297,247 393,760 — 1,691,007 Sales and Proceeds from Investments (8,891 ) (9,218 ) — (18,109 ) Transfer Out of Level III (a) — (1,820 ) — (1,820 ) Change in Gain (Loss) Included in Net Assets 220,755 (18,512 ) 4,699 206,942 Balance, End of Period  $ 3,077,035  $ 470,950  $ 204,907  $ 3,752,892 Changes in Unrealized Gain (Loss) Included in Earnings Related to Financial Assets Still Held at the Reporting Date  $ 220,755  $ (18,512 )  $ 4,699  $ 206,942 Level III Financial Assets at Fair Value Nine Months Ended September 30, 2024 Affiliated Portfolio Debt Investee Companies Investments Funds Total Balance, Beginning of Period  $ —  $ —  $ —  $ — Purchases 2,865,691   443,366 194,133   3,503,190   Sales and Proceeds from Investments (8,891 ) (11,106 ) — (19,997 ) Transfer Into Level III (b) — 51,535 — 51,535 Transfer Out of Level III (a)(b) (49,538 ) (1,820 ) — (51,358 ) Change in Gain (Loss) Included in Net Assets 269,773 (11,025 ) 10,774 269,522 Balance, End of Period  $ 3,077,035  $ 470,950  $ 204,907  $ 3,752,892 Changes in Unrealized Gain (Loss) Included in Earnings Related to Financial Assets Still Held at the Reporting Date  $ 269,773  $ (11,025 )  $ 10,774  $ 269,522 (a) For the three months ended September 30, 2024, the transfers out of Level III financial assets were due to changes in the observability of inputs used in the valuation of such assets. (b) For the nine months ended September 30, 2024, the transfers in and out of Level III financial assets were primarily due to a Level III Portfolio Companies investment transferring into Level III Debt Investments.
Summary of Fair Value of Investments in Affiliates and unfunded commitment	Investments in Affiliated Investee Funds by Strategy Unfunded Fair Value Secondaries Other Investment(s) in Affiliated Investee Funds  $ 118,859    $ 197,747   118,859 197,747 Specialty Finance Blackstone CLO Management LLC – Series 9 — 291,496 Other Investment(s) in Affiliated Investee Funds 65,316 225,855 65,316 517,351  $ 184,175  $ 715,098

Derivative Instruments (Tables)

Derivative Instruments (Tables) - BXPE US Aggregator CYM L P [Member]	9 Months Ended
	Sep. 30, 2024
Summary of the Aggregate Notional Amount and Fair Value of the Derivative Financial Instruments	The table below summarizes the aggregate notional amount and fair value of the derivative instruments. The notional amount represents the absolute value amount of the foreign exchange contracts: September 30, 2024 December 31, 2023 Liabilities Liabilities Fair Fair   Notional   Value Notional Value Derivative Instruments Foreign Currency Contracts (EUR)   €  495,000   $  20,416    €    —   $    —  Foreign Currency Contracts (GBP)  £ 61,967  8,368   £ —  —
Summary of the Impact to the Condensed Consolidated Statements of Operations from Derivative Financial Instruments	The table below summarizes the impact to the Condensed Consolidated Statements of Operations from derivative instruments: Three Months Ended Nine Months Ended September 30, September 30, 2024 2023 2024 2023 Derivative Instruments Realized Gain Foreign Currency Contracts  $   3,578  $    —  $   3,578  $   — Net Change in Unrealized Gain (Loss) Foreign Currency Contracts (31,720 ) — (28,783 ) —  $ (28,142 )  $ —  $ (25,205 )  $   —

Net Assets (Tables)

Net Assets (Tables)	9 Months Ended
	Sep. 30, 2024
Net Asset [Line Items]
Summary of the Units issued during the period	The following table presents transactions in the Units during the three and nine months ended September 30, 2024 and 2023: Class S Units Class D Units Class I Units Total Units Outstanding as of June 30, 2023 and September 30, 2023 — — 4,000 4,000 Units Outstanding as of June 30, 2024 48,916,722 1,874,867 63,954,404 114,745,993  Units Issued 7,854,107 408,745 13,961,933 22,224,785  Conversion of Units Between Classes (345,580 ) (60,000 ) 403,739 (1,841 )  Repurchase of Units (24,000 ) — (49,400 ) (73,400 ) Units Outstanding as of September 30, 2024  56,401,249  2,223,612  78,270,676  136,895,537 Class S Units Class D Units Class I Units Total Units Outstanding as of December 31, 2022 and September 30, 2023 — — 4,000 4,000 Units Outstanding as of December 31, 2023 — — 4,000 4,000  Units Issued 56,928,443 2,283,612 77,755,281 136,967,336  Conversion of Units Between Classes (503,194 ) (60,000 ) 560,795 (2,399 )  Repurchase of Units (24,000 ) — (49,400 ) (73,400 ) Units Outstanding as of September 30, 2024  56,401,249  2,223,612  78,270,676  136,895,537
BXPE US Aggregator (CYM) L.P [Member]
Net Asset [Line Items]
Summary of the Units issued during the period	The following table presents transactions in the Aggregator’s Units during the three and nine months ended September 30, 2024 and 2023: Class A Units Total Units Outstanding as of June 30, 2023 and September 30, 2023 — — Units Outstanding as of June 30, 2024 158,901,585 158,901,585 Units Issued 26,987,238   26,987,238   Repurchase of Units (177,523 ) (177,523 ) Units Outstanding as of September 30, 2024  185,711,300  185,711,300 Class A Units Total Units Outstanding as of December 31, 2022 and September 30, 2023 — — Units Outstanding as of December 31, 2023 — — Units Issued 185,888,823   185,888,823   Repurchase of Units (177,523 ) (177,523 ) Units Outstanding as of September 30, 2024  185,711,300  185,711,300

Financial Highlights (Tables)

Financial Highlights (Tables)	9 Months Ended
	Sep. 30, 2024
Investment Company, Financial Highlights [Line Items]
Capital Transactions and Differing Fee Arrangements	The following financial highlights for the nine months ended September 30, 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 nine months ended September 30, 2023. Nine Months Ended September 30, 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 Loss (0.02 ) (0.02 ) (0.02 ) Net Change in Unrealized Gain (Loss) on Investments Allocated from BXPE US Aggregator (CYM) L.P. 2.23 2.23 2.24 Net Increase in Net Assets Resulting from Investment Operations 2.21 2.21 2.22 Servicing Fees (1.76 ) (0.53 ) — Net Increase in Net Assets 0.45 1.68 2.22 Net Asset Value, End of Period  $ 25.45  $ 26.68  $ 27.22 Units Outstanding, End of Period 56,401,249 2,223,612 78,270,676 Total Return Based on Net Asset Value (a) 1.80 % 6.72 % 8.88 % Ratios to Weighted-Average Net Assets (Non-Annualized) Expenses without Waivers (b) 0.12 % 0.14 % 0.12 % Warehousing Fees Waivers -0.04 % -0.05 % -0.05 % Total Expenses 0.08 % 0.09 % 0.07 % Net Investment Loss -0.08 % -0.09 % -0.07 % (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 initial Net Asset Value per Unit of $25.00. 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 nine months ended September 30, 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 inception Nine Months Ended September 30, 2024 Class A Units Per Unit Data Net Asset Value, Beginning of Period  $ — Proceeds from Units Issued 25.00 Net Investment Income 0.27 Net Realized and Unrealized Gain (Loss) on Investments, Derivative Instruments and Translation of Assets and Liabilities in Foreign Currencies 1.97 Net Increase in Net Assets 2.24 Net Asset Value, End of Period  $ 27.24 Units Outstanding, End of Period 185,711,300 Total Return Based on Net Asset Value (a) 8.96 % Ratios to Weighted-Average Net Assets (Non-Annualized) Expenses without Waivers (b) 1.62 % Expenses and Management Fees Waivers (b) -0.51 % Accrued Performance Participation Allocation 1.44 % Total Expenses 2.55 % Net Investment Income 0.38 % (a) Total return is calculated as the change in Net Asset Value per Aggregator Unit during the period, plus distributions per Aggregator Unit (assuming dividends and distributions are reinvested in accordance with the Aggregator’s distribution reinvestment plan) divided by the initial Net Asset Value per Aggregator Unit of $25.00. 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) - BXPE US Aggregator (CYM) L.P [Member]	Jan. 02, 2024	Sep. 30, 2024
Amortized term of deferred expenses included as asset	12 months
Management fee reduced on pro data basis		100%

Investment in the Aggregator -

Investment in the Aggregator - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2024
Investment In The Aggregator [Line Items]
Percentage of interest in the aggregator	73.50%
Maximum [Member]
Investment In The Aggregator [Line Items]
Percentage of holding investment of the aggregator	5%
Percentage of listing investment of the aggregator	5%

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	Sep. 30, 2024	Dec. 31, 2023
Assets
Cash and Cash Equivalents	$ 72,702
Investments	4,369,696
Investments in Affiliated Investee Funds	715,098	$ 0
Total Assets	5,157,496
Liabilities
Derivative Liabilities	28,783
Cash Held at Banks [Member]
Assets
Cash and Cash Equivalents	11,170
Money Market Fund [Member]
Assets
Cash and Cash Equivalents	61,532
Portfolio Companies [Member]
Assets
Investments	3,141,997
Debt Investments [Member]
Assets
Investments	1,227,699
Level I [Member]
Assets
Cash and Cash Equivalents	72,702
Total Assets	72,702
Level I [Member] | Cash Held at Banks [Member]
Assets
Cash and Cash Equivalents	11,170
Level I [Member] | Money Market Fund [Member]
Assets
Cash and Cash Equivalents	61,532
Level II [Member]
Assets
Cash and Cash Equivalents	0
Investments	756,749
Total Assets	756,749
Liabilities
Derivative Liabilities	28,783
Level II [Member] | Debt Investments [Member]
Assets
Investments	756,749
Level III [Member]
Assets
Investments	3,547,985
Investments in Affiliated Investee Funds	204,907
Total Assets	3,752,892
Level III [Member] | Portfolio Companies [Member]
Assets
Investments	3,077,035
Level III [Member] | Debt Investments [Member]
Assets
Investments	470,950
NAV [Member]
Assets
Investments	64,962
Investments in Affiliated Investee Funds	510,191
Total Assets	575,153
NAV [Member] | Portfolio Companies [Member]
Assets
Investments	$ 64,962

Investments and Fair Value Me_4

Investments and Fair Value Measurement - Summary of Fair Value Measurement Inputs and Valuation Techniques (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2024 USD ($)	Dec. 31, 2023 USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 3,718,151	$ 0
BXPE US Aggregator (CYM) L.P [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	4,369,696	0
Investments in Affiliated Investee Funds	715,098	$ 0
Total Assets	5,157,496
Maximum [Member] | BXPE US Aggregator (CYM) L.P [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 0
Valuation Technique Third Party Pricing [Member] | BXPE US Aggregator (CYM) L.P [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Valuation Techniques	Third Party Pricing
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	Transactional Value
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 Cash Flows
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	33.8
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	10.3
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	17.4
Portfolio Companies [Member] | Measurement Input Performance Multiple [Member] | Valuation, Market Approach [Member] | BXPE US Aggregator (CYM) L.P [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Valuation Techniques	Market Approach
Unobservable Inputs	Performance Multiple
Measurement Input	31.5
Portfolio Companies [Member] | Measurement Input Performance Multiple [Member] | Valuation, Market Approach [Member] | Weighted Average [Member] | BXPE US Aggregator (CYM) L.P [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement Input	31.5
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	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	7.6
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	16.1
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] | Higher Impact [Member] | Measurement Input Performance Multiple [Member] | Valuation, Market Approach [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
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 Investments [Member] | Valuation Technique Transactional Value [Member] | BXPE US Aggregator (CYM) L.P [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Valuation Techniques	Third Party Pricing
Debt Investments [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 Cash Flows
Unobservable Inputs	WACC
Debt Investments [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	15.2
Debt Investments [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	8.3
Debt Investments [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	14.3
Debt Investments [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
Fair Value, Inputs, Level 3 [Member] | BXPE US Aggregator (CYM) L.P [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 3,547,985
Investments in Affiliated Investee Funds	204,907
Total Assets	3,752,892
Fair Value, Inputs, Level 3 [Member] | Valuation Technique Third Party Pricing [Member] | BXPE US Aggregator (CYM) L.P [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments in Affiliated Investee Funds	204,907
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	66,064
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	2,970,493
Fair Value, Inputs, Level 3 [Member] | Portfolio Companies [Member] | Measurement Input Performance Multiple [Member] | Valuation, Market Approach [Member] | BXPE US Aggregator (CYM) L.P [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	40,478
Fair Value, Inputs, Level 3 [Member] | Debt Investments [Member] | Valuation Technique Transactional Value [Member] | BXPE US Aggregator (CYM) L.P [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	17,964
Fair Value, Inputs, Level 3 [Member] | Debt Investments [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	$ 452,986

Investments and Fair Value Me_5

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] - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2024
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance, Beginning of Period	$ 1,874,872
Purchases	1,691,007	$ 3,503,190
Sales and Proceeds from Investments	(18,109)	(19,997)
Transfer Into Level III		51,535
Transfer Out of Level III	(1,820)	(51,358)
Net Change in Unrealized Gain (Loss) on Investments	206,942	269,522
Balance, End of Period	3,752,892	3,752,892
Changes in Unrealized Gain (Loss) Included in Earnings Related to Financial Assets Still Held at the Reporting Date	206,942	269,522
Portfolio Companies [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance, Beginning of Period	1,567,924
Purchases	1,297,247	2,865,691
Sales and Proceeds from Investments	(8,891)	(8,891)
Transfer Out of Level III		(49,538)
Net Change in Unrealized Gain (Loss) on Investments	220,755	269,773
Balance, End of Period	3,077,035	3,077,035
Changes in Unrealized Gain (Loss) Included in Earnings Related to Financial Assets Still Held at the Reporting Date	220,755	269,773
Debt Investments [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance, Beginning of Period	106,740
Purchases	393,760	443,366
Sales and Proceeds from Investments	(9,218)	(11,106)
Transfer Into Level III		51,535
Transfer Out of Level III	(1,820)	(1,820)
Net Change in Unrealized Gain (Loss) on Investments	(18,512)	(11,025)
Balance, End of Period	470,950	470,950
Changes in Unrealized Gain (Loss) Included in Earnings Related to Financial Assets Still Held at the Reporting Date	(18,512)	(11,025)
Affiliated Investee [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance, Beginning of Period	200,208
Purchases		194,133
Net Change in Unrealized Gain (Loss) on Investments	4,699	10,774
Balance, End of Period	204,907	204,907
Changes in Unrealized Gain (Loss) Included in Earnings Related to Financial Assets Still Held at the Reporting Date	$ 4,699	$ 10,774

Investments and Fair Value Me_6

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	Sep. 30, 2024	Dec. 31, 2023
Disclosure In Tabular Form Of Fair Value Of Investments In Affiliates And Unfunded Commitment [Line Items]
Unfunded Commitment	$ 184,175
Fair Value	715,098	$ 0
Private Equity [Member]
Disclosure In Tabular Form Of Fair Value Of Investments In Affiliates And Unfunded Commitment [Line Items]
Unfunded Commitment	118,859
Fair Value	197,747
Debt [Member]
Disclosure In Tabular Form Of Fair Value Of Investments In Affiliates And Unfunded Commitment [Line Items]
Unfunded Commitment	65,316
Fair Value	517,351
Other Debt Investment(s) in Affiliated Investee Funds [Member] | Private Equity [Member]
Disclosure In Tabular Form Of Fair Value Of Investments In Affiliates And Unfunded Commitment [Line Items]
Unfunded Commitment	118,859
Fair Value	197,747
Other Debt Investment(s) in Affiliated Investee Funds [Member] | Debt [Member]
Disclosure In Tabular Form Of Fair Value Of Investments In Affiliates And Unfunded Commitment [Line Items]
Unfunded Commitment	65,316
Fair Value	225,855
Blackstone CLO Management LLC – Series 9 [Member] | Debt [Member]
Disclosure In Tabular Form Of Fair Value Of Investments In Affiliates And Unfunded Commitment [Line Items]
Fair Value	$ 291,496

Investments and Fair Value Me_7

Investments and Fair Value Measurement - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2024	Sep. 30, 2023
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment company unrealized gain loss on investments after tax operating		$ 240,759	$ 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		293,081	0
Investment company realized gains losses on investments after tax operating		1,495	$ 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	$ 18,900	60,900
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	$ 0	$ 100

Line of Credit Agreement - Addi

Line of Credit Agreement - Additional Information (Detail) - USD ($) $ in Thousands					9 Months Ended
	Oct. 03, 2024	Aug. 08, 2024	Jul. 25, 2024	Nov. 03, 2023	Sep. 30, 2024	Oct. 31, 2024
Line of Credit Facility [Line Items]
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]				us-gaap:SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember
Line of Credit Agreement [Member]
Line of Credit Facility [Line Items]
Debt instrument interest rate				3%
Aggregator Credit Agreement [Member] | Maximum [Member] | BXPE US Aggregator (CYM) L.P [Member]
Line of Credit Facility [Line Items]
Line of credit facility, unused capacity, commitment fee percentage	0.70%
Aggregator Credit Agreement [Member] | Minimum [Member] | BXPE US Aggregator (CYM) L.P [Member]
Line of Credit Facility [Line Items]
Line of credit facility, unused capacity, commitment fee percentage	0.50%
Aggregator Credit Agreement [Member] | Secured Overnight Financing Rate (SOFR) [Member] | BXPE US Aggregator (CYM) L.P [Member]
Line of Credit Facility [Line Items]
Line of credit facility, interest rate at period end	3.50%
Line of credit facility, interest rate during period	3.50%
Aggregator Credit Agreement [Member] | Base Rate [Member] | BXPE US Aggregator (CYM) L.P [Member]
Line of Credit Facility [Line Items]
Line of credit facility, interest rate at period end						2.50%
Aggregator Credit Agreement [Member] | Base Rate [Member] | Maximum [Member] | BXPE US Aggregator (CYM) L.P [Member]
Line of Credit Facility [Line Items]
Line of credit facility, interest rate at period end						2.50%
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				$ 300,000
Line of Credit [Member] | BXPE US Aggregator (CYM) L.P [Member]
Line of Credit Facility [Line Items]
Line of credit facility, initiation date		Nov. 03, 2023
Line of Credit [Member] | AR Line Of Credit [Member] | BXPE US Aggregator (CYM) L.P [Member]
Line of Credit Facility [Line Items]
Line of credit facility, fair value of amount outstanding					$ 0
Line of Credit [Member] | Bonavista Credit Facility [Member] | BXPE US Aggregator (CYM) L.P [Member]
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity			$ 300,000
Line of credit facility, fair value of amount outstanding					$ 0
Line of credit facility, unused capacity, commitment fee percentage			1%
Line of Credit [Member] | Bonavista Credit Facility [Member] | Maximum [Member] | BXPE US Aggregator (CYM) L.P [Member]
Line of Credit Facility [Line Items]
Line of credit facility, unused capacity, commitment fee percentage			0.30%
Line of Credit [Member] | Bonavista Credit Facility [Member] | Minimum [Member] | BXPE US Aggregator (CYM) L.P [Member]
Line of Credit Facility [Line Items]
Line of credit facility, unused capacity, commitment fee percentage			0.30%
Line of Credit [Member] | Secured Overnight Financing Rate (SOFR) [Member] | Bonavista Credit Facility [Member] | BXPE US Aggregator (CYM) L.P [Member]
Line of Credit Facility [Line Items]
Line of credit facility, interest rate at period end			1.25%
Line of Credit [Member] | Base Rate [Member] | Bonavista Credit Facility [Member] | BXPE US Aggregator (CYM) L.P [Member]
Line of Credit Facility [Line Items]
Line of credit facility, interest rate at period end			1.25%
Line of Credit [Member] | Aggregator Credit Agreement [Member] | BXPE US Aggregator (CYM) L.P [Member]
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	$ 375,000
Line of Credit [Member] | Aggregator Credit Agreement [Member] | Maximum [Member] | BXPE US Aggregator (CYM) L.P [Member]
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity						$ 675,000
Line of Credit [Member] | Aggregator Credit Agreement [Member] | Minimum [Member] | BXPE US Aggregator (CYM) L.P [Member]
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity						$ 300,000
Letter of Credit [Member] | Aggregator Credit Agreement [Member] | Maximum [Member] | BXPE US Aggregator (CYM) L.P [Member]
Line of Credit Facility [Line Items]
Debt instrument interest rate	20%
Letter of Credit [Member] | Aggregator Credit Agreement [Member] | Minimum [Member] | BXPE US Aggregator (CYM) L.P [Member]
Line of Credit Facility [Line Items]
Debt instrument interest rate	10%
Letter of Credit [Member] | Aggregator Credit Agreement [Member] | Median [Member] | BXPE US Aggregator (CYM) L.P [Member]
Line of Credit Facility [Line Items]
Debt instrument interest rate	30%

Derivative Instruments - Summar

Derivative Instruments - Summary of the Aggregate Notional Amount and Fair Value of the Derivative Financial Instruments (Detail) - Foreign Currency Contracts [Member] - BXPE US Aggregator CYM L P [Member] £ in Thousands, $ in Thousands	Sep. 30, 2024 EUR (€)	Sep. 30, 2024 USD ($)	Sep. 30, 2024 GBP (£)	Dec. 31, 2023 EUR (€)	Dec. 31, 2023 USD ($)	Dec. 31, 2023 GBP (£)
EUR [Member]
Derivative [Line Items]
Derivative Asset, Notional Amount	€ 495,000	$ 20,416		€ 0	$ 0
GBP [Member]
Derivative [Line Items]
Derivative Asset, Notional Amount		$ 8,368	£ 61,967		$ 0	£ 0

Derivative Instruments - Summ_2

Derivative Instruments - Summary of the Impact to the Condensed Consolidated Statements of Operations from Derivative Financial Instruments (Detail) - BXPE US Aggregator CYM L P [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Net Change in Unrealized Gain (Loss)
Derivative Instruments	$ (28,142)	$ 0	$ (25,205)	$ 0
Foreign Currency Contracts [Member] | Derivative Realized Gain [Member]
Net Change in Unrealized Gain (Loss)
Derivative Instruments	3,578	0	3,578	0
Foreign Currency Contracts [Member] | Derivative Unrealized Gain (Loss) [Member]
Net Change in Unrealized Gain (Loss)
Derivative Instruments	$ (31,720)	$ 0	$ (28,783)	$ 0

Net Assets - Additional Informa

Net Assets - Additional Information (Detail)	3 Months Ended	9 Months Ended
	Sep. 30, 2024 $ / shares shares	Sep. 30, 2024 $ / shares shares
Net Asset [Line Items]
Net asset value per share | $ / shares	$ 25	$ 25
Percentage of repurchase of units outstanding	3%	3%
Percentage of early deduction units repurchased	5%	5%
Repurchase of Units	73,400	73,400
Repurchase Agreements [Member]
Net Asset [Line Items]
Repurchase of Units	73,400	73,400
BXPE US Aggregator (CYM) L.P [Member]
Net Asset [Line Items]
Net asset value per share | $ / shares	$ 25	$ 25
Repurchase of Units	177,523	177,523
BXPE US Aggregator (CYM) L.P [Member] | Repurchase Agreements [Member]
Net Asset [Line Items]
Repurchase of Units	177,523	177,523

Net Assets - Summary of the Uni

Net Assets - Summary of the Units issued during the period (Detail) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Net Asset [Line Items]
Beginning Units Outstanding	114,745,993	4,000	4,000	4,000
Units Issued	22,224,785		136,967,336
Conversion of Units Between Classes	(1,841)		(2,399)
Repurchase of Units	(73,400)		(73,400)
Ending Units Outstanding	136,895,537	4,000	136,895,537	4,000
Class S Units [Member]
Net Asset [Line Items]
Beginning Units Outstanding	48,916,722	0	0	0
Units Issued	7,854,107		56,928,443
Conversion of Units Between Classes	(345,580)		(503,194)
Repurchase of Units	(24,000)		(24,000)
Ending Units Outstanding	56,401,249	0	56,401,249	0
Class D Units [Member]
Net Asset [Line Items]
Beginning Units Outstanding	1,874,867	0	0	0
Units Issued	408,745		2,283,612
Conversion of Units Between Classes	(60,000)		(60,000)
Repurchase of Units	0		0
Ending Units Outstanding	2,223,612	0	2,223,612	0
Class I Units [Member]
Net Asset [Line Items]
Beginning Units Outstanding	63,954,404	4,000	4,000	4,000
Units Issued	13,961,933		77,755,281
Conversion of Units Between Classes	403,739		560,795
Repurchase of Units	(49,400)		(49,400)
Ending Units Outstanding	78,270,676	4,000	78,270,676	4,000
BXPE US Aggregator (CYM) L.P [Member]
Net Asset [Line Items]
Beginning Units Outstanding	158,901,585	0	0	0
Units Issued	26,987,238		185,888,823
Repurchase of Units	(177,523)		(177,523)
Ending Units Outstanding	185,711,300	0	185,711,300	0
BXPE US Aggregator (CYM) L.P [Member] | Class A Units [Member]
Net Asset [Line Items]
Beginning Units Outstanding	158,901,585	0	0	0
Units Issued	26,987,238		185,888,823
Repurchase of Units	(177,523)		(177,523)
Ending Units Outstanding	185,711,300	0	185,711,300	0

Related Party Transactions - Ad

Related Party Transactions - Additional Information (Detail) - USD ($)		3 Months Ended		9 Months Ended
	Jan. 02, 2024	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Related Party Transaction [Line Items]
Performance participation allocation		$ 20,200,000		$ 36,400,000
Management fee waived		0		13,500
Management fee attributable to subsidiary		10,900,000		24,500,000
Administration fee payable		900,000		2,000,000
Servicing Fees Payable		92,391,000		92,391,000		$ 0
Class S [Member]
Related Party Transaction [Line Items]
Servicing Fees Payable		92,400,000		92,400,000
Class D [Member]
Related Party Transaction [Line Items]
Servicing Fees Payable		$ 92,400,000		$ 92,400,000
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%		1.25%
Administration fee payable rate		0.10%		0.10%
Performance participation allocation		$ 27,700,000		$ 48,500,000
Management fee expense		15,074,000	$ 0	32,021,000	$ 0
Investment company voluntary fee waived		0		16,900,000
Accrued administration fees		1,200,000		2,600,000
Investments in affliated investee funds		715,100,000		715,100,000
Accrued waived expenses				$ 200,000
Specified expenses as a percentage of net asset value maximum				0.50%
Investment company sell price		13,700,000		$ 21,500,000
BXPE US Aggregator (CYM) L.P [Member] | Warehouse Agreement [Member]
Related Party Transaction [Line Items]
Aggregate investment purchase price	$ 305,300,000	$ 354,300,000		$ 354,300,000

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail) - BXPE US Aggregator (CYM) L.P [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Commitments and Contingencies Disclosure [Line Items]
Deferred offering costs	$ 2,700		$ 2,700
Deferred expense amortization period			12 months
Organizational expenses	932	$ 0	$ 6,408	$ 0
Offering expenses	700		2,100
Unfunded investment commitments	611,400		611,400
Conditional investment commitments	1,200,000		1,200,000
Maximum [Member]
Commitments and Contingencies Disclosure [Line Items]
Organizational expenses	$ 400		5,600
Investment Manager [Member] | Offering Expenses [Member]
Commitments and Contingencies Disclosure [Line Items]
Related party transaction, amounts of transaction			8,300
Investment Manager [Member] | Organizational Expenses [Member]
Commitments and Contingencies Disclosure [Line Items]
Related party transaction, amounts of transaction			$ 5,600

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - BXPE US Aggregator CYM L P [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Income Tax Examination [Line Items]
Effective Income Tax Rate Reconciliation, Percent, Total	5.80%		4.10%
Income Tax Expense (Benefit)	$ 11,191	$ 0	$ 13,541	$ 0
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	0%		0%

Warehousing Agreement - Additio

Warehousing Agreement - Additional Information (Detail) $ in Millions	Jan. 02, 2024 USD ($) Integer	Nov. 03, 2023 USD ($)	Sep. 30, 2024 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)	9 Months Ended
	Sep. 30, 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 (Loss)	(0.02)
Net Realized and Unrealized Gain (Loss) on Investments, Derivative Instruments and Translation of Assets and Liabilities in Foreign Currencies	2.23
Net Increase in Net Assets Resulting from Investment Operations	2.21
Servicing Fees	(1.76)
Net Increase in Net Assets	0.45
Net Asset Value, End of Period	$ 25.45
Units Outstanding, End of Period | shares	56,401,249
Total Return Based on Net Asset Value	1.80%	[1]
Ratios to Weighted Average Net Assets (Non-Annualized)
Expenses without Waivers	0.12%	[2]
Warehousing Fees Waivers	(0.04%)
Total Expenses	0.08%
Net Investment Income (Loss)	(0.08%)
Class D [Member]
Per Unit Data
Net Asset Value, Beginning of Period	$ 0
Proceeds from Units Issued	25
Net Investment Income (Loss)	(0.02)
Net Realized and Unrealized Gain (Loss) on Investments, Derivative Instruments and Translation of Assets and Liabilities in Foreign Currencies	2.23
Net Increase in Net Assets Resulting from Investment Operations	2.21
Servicing Fees	(0.53)
Net Increase in Net Assets	1.68
Net Asset Value, End of Period	$ 26.68
Units Outstanding, End of Period | shares	2,223,612
Total Return Based on Net Asset Value	6.72%	[1]
Ratios to Weighted Average Net Assets (Non-Annualized)
Expenses without Waivers	0.14%	[2]
Warehousing Fees Waivers	(0.05%)
Total Expenses	0.09%
Net Investment Income (Loss)	(0.09%)
Class I [Member]
Per Unit Data
Net Asset Value, Beginning of Period	$ 25
Proceeds from Units Issued	0
Net Investment Income (Loss)	(0.02)
Net Realized and Unrealized Gain (Loss) on Investments, Derivative Instruments and Translation of Assets and Liabilities in Foreign Currencies	2.24
Net Increase in Net Assets Resulting from Investment Operations	2.22
Servicing Fees	0
Net Increase in Net Assets	2.22
Net Asset Value, End of Period	$ 27.22
Units Outstanding, End of Period | shares	78,270,676
Total Return Based on Net Asset Value	8.88%	[1]
Ratios to Weighted Average Net Assets (Non-Annualized)
Expenses without Waivers	0.12%	[2]
Warehousing Fees Waivers	(0.05%)
Total Expenses	0.07%
Net Investment Income (Loss)	(0.07%)
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 (Loss)	0.27
Net Realized and Unrealized Gain (Loss) on Investments, Derivative Instruments and Translation of Assets and Liabilities in Foreign Currencies	1.97
Net Increase in Net Assets	2.24
Net Asset Value, End of Period	$ 27.24
Units Outstanding, End of Period | shares	185,711,300
Total Return Based on Net Asset Value	8.96%	[3]
Ratios to Weighted Average Net Assets (Non-Annualized)
Expenses without Waivers	1.62%	[4]
Warehousing Fees Waivers	(0.51%)	[4]
Accrued Performance Participation Allocation	1.44%
Total Expenses	2.55%
Net Investment Income (Loss)	0.38%
[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 initial Net Asset Value per Unit of $25.00. 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 Aggregator Unit during the period, plus distributions per Aggregator Unit (assuming dividends and distributions are reinvested in accordance with the Aggregator’s distribution reinvestment plan) divided by the beginning Net Asset Value per Aggregator 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 - Schedu_2

Financial Highlights - Schedule of Capital Transactions and Differing Fee Arrangements (Detail) (Parenthetical)	Sep. 30, 2024 $ / shares
Investment Company, Financial Highlights [Line Items]
Net asset value per share	$ 25
BXPE US Aggregator CYM L P [Member]
Investment Company, Financial Highlights [Line Items]
Net asset value per share	$ 25

Financial Highlights - Addition

Financial Highlights - Additional Information (Detail) - BXPE US Aggregator CYM L P [Member] - shares	Sep. 30, 2024	Dec. 31, 2023	Sep. 30, 2023
Capital Unit, Class A [Member]
Investment Company, Financial Highlights [Line Items]
Limited Partners' Capital Account, Units Outstanding	185,711,300	0	0
Limited Partners' Capital Account, Units Issued	185,711,300	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)	9 Months Ended
	Sep. 30, 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 except as noted below, has determined that there were no subsequent events requiring adjustment to or disclosure in the condensed consolidated financial statements.