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Number of loans count.

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Proceeds From Loan Origination And Other Loan Receivable Fees

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Represents repayments of loan participants.

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SEC Schedule, 12-29, Real Estate Companies, Investment In Mortgage Loans On Real Estate, Remaining Amount Of Mortgage

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Amount of contractual principal due at origination of mortgage loan within investment in mortgage loan on real estate by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate.

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Face (par) amount of debt instrument at time of issuance.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount of decrease in investment in mortgage loan on real estate by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate, from sale.

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Transactions With Related Parties - Affiliate Transactions (Details) $ in Thousands, € in Millions, £ in Millions	3 Months Ended				6 Months Ended
	Dec. 31, 2024 USD ($) loan	Sep. 30, 2024 USD ($)	Sep. 30, 2024 EUR (€)	Sep. 30, 2024 GBP (£)	Jun. 30, 2025 USD ($) loan	Jun. 30, 2024 USD ($)	Mar. 31, 2025 USD ($)	Sep. 30, 2024 EUR (€)	Sep. 30, 2024 GBP (£)	Dec. 31, 2021 EUR (€)	Dec. 31, 2019 EUR (€)	Dec. 31, 2018 GBP (£)
Related Party Transaction [Line Items]
Total face value					$ 14,035,684
Origination and other fees received on loans receivable					30,475	$ 11,774
Book Value	$ 4,452				108,087
Repayment of loan participations					$ 54,028	235,960
Bank Loan Portfolio Joint Venture
Related Party Transaction [Line Items]
Ownership percentage					29.00%
Book Value					$ 55,906
Net Lease Joint Venture
Related Party Transaction [Line Items]
Ownership percentage	75.00%				75.00%
Book Value	$ 4,452				$ 52,181
Secured term loans, net
Related Party Transaction [Line Items]
Total face value	1,764,437				1,760,748
Senior secured notes, net
Related Party Transaction [Line Items]
Total face value	785,316				785,316
Securitized debt obligations, net
Related Party Transaction [Line Items]
Face Value	1,936,967				2,502,834
Principal Balance, collateral assets	2,552,403				3,204,886
Total face value	1,936,967				2,502,834
B-6 Term Loan \| Secured term loans, net
Related Party Transaction [Line Items]
Maximum borrowing capacity					1,000,000
Total face value	0				1,048,375
B-5 Term Loan \| Secured term loans, net
Related Party Transaction [Line Items]
Maximum borrowing capacity	650,000
Total face value	650,000				0
December 2024 \| Senior secured notes, net
Related Party Transaction [Line Items]
Face Value	450,000
Total face value	$ 450,000				450,000
2025 FL5 Underlying Collateral Assets \| Securitized debt obligations, net
Related Party Transaction [Line Items]
Principal Balance, collateral assets					997,805		$ 1,000,000
Related Party
Related Party Transaction [Line Items]
Face amount of loans		$ 94,400			1,400,000				£ 303.5	€ 350.0	€ 350.0	£ 148.7
Related party transaction, interest in loan, percentage		17.00%	17.00%	17.00%
Selling loan amount \| €			€ 232.0
Remaining loan amount in new lenders \| €								€ 347.0
Repayment of loan participations		$ 46,400
Related Party \| Senior Participations
Related Party Transaction [Line Items]
Proceeds of loan participations \| £				£ 100.0
Related Party \| Senior Loans
Related Party Transaction [Line Items]
Face amount of loans		$ 560,000
Agency Multifamily Lending Partnership \| Related Party
Related Party Transaction [Line Items]
Number of loans referred \| loan	3
Origination and other fees received on loans receivable	$ 217
Blackstone-Advised Investment Vehicles, or the Funds
Related Party Transaction [Line Items]
Proceeds from sale of assets						59,000
Blackstone-Advised Investment Vehicles, or the Funds \| Performing Loans, Blackstone-Advised Investment Vehicle
Related Party Transaction [Line Items]
Origination and other fees received on loans receivable					$ 554,400	$ 98,600
Number of loans count \| loan					4
Blackstone-Advised Investment Vehicles, or the Funds \| Performing Loan
Related Party Transaction [Line Items]
Origination and other fees received on loans receivable					$ 148,800
Blackstone-Advised Investment Vehicles, or the Funds \| Related Party \| Senior Loans
Related Party Transaction [Line Items]
Face Value					$ 562,800
Count, financing provided \| loan					3
Blackstone-Advised Investment Vehicles, or the Funds \| Related Party \| Mezzanine Loan
Related Party Transaction [Line Items]
Face Value					$ 93,600
Count, financing provided \| loan					3
Blackstone-Advised Investment Vehicles, or the Funds \| Related Party \| B-6 Term Loan \| Secured term loans, net
Related Party Transaction [Line Items]
Principal Balance, collateral assets					$ 83,900
Blackstone-Advised Investment Vehicles, or the Funds \| Related Party \| B-5 Term Loan \| Secured term loans, net
Related Party Transaction [Line Items]
Principal Balance, collateral assets	62,500
Blackstone-Advised Investment Vehicles, or the Funds \| Related Party \| December 2024 \| Senior secured notes, net
Related Party Transaction [Line Items]
Principal Balance, collateral assets	$ 80,000
Blackstone-Advised Investment Vehicles, or the Funds \| Related Party \| 2025 FL5 Underlying Collateral Assets \| Securitized debt obligations, net
Related Party Transaction [Line Items]
Principal Balance, collateral assets							$ 75,000