Joint Venture - BCRED Emerald JV and BCRED Verdelite JV (Details) - USD ($)					12 Months Ended
	Dec. 22, 2022	Oct. 21, 2022	Sep. 26, 2022	Sep. 25, 2022	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Schedule of Equity Method Investments [Line Items]
Capital contribution					$ 0	$ 0	$ 459,430,000
Loan Purchase | Affiliated Entity
Schedule of Equity Method Investments [Line Items]
Purchases from related party					482,400,000
Loan Purchase, Fair Value | Affiliated Entity
Schedule of Equity Method Investments [Line Items]
Purchases from related party					486,900,000
BCRED Emerald JV LP
Schedule of Equity Method Investments [Line Items]
Committed contribution			$ 2,250,000,000	$ 1,500,000,000
Capital contribution	$ 222,000,000.0		940,500,000		$ 1,815,000,000	2,002,500,000
Payments to acquire equity method investments	97,700,000		670,200,000	733,400,000
In-kind capital investments contributed	124,300,000		270,300,000
Equity ownership percentage					75.00%
Proceeds from sale of investments			1,971,600,000
Available capital contribution					$ 435,000,000.0	247,500,000
BCRED Emerald JV LP | JV Partner
Schedule of Equity Method Investments [Line Items]
Committed contribution			750,000,000.0	500,000,000.0
Capital contribution	$ 74,000,000.0		313,500,000		$ 605,000,000.0	667,500,000
Payments to acquire equity method investments			251,400,000
In-kind capital investments contributed			$ 62,100,000
Equity ownership percentage					25.00%
Available capital contribution					$ 145,000,000.0	82,500,000
Contributed net assets				244,500,000
Aggregate cost of assets contributed				$ 977,800,000
BCRED Verdelite JV LP
Schedule of Equity Method Investments [Line Items]
Committed contribution		$ 147,000,000.0
Capital contribution		26,200,000
Payments to acquire equity method investments		117,700,000			$ 117,700,000	$ 117,700,000
In-kind capital investments contributed		91,500,000
Equity ownership percentage					87.50%	87.50%
Available capital contribution					$ 29,300,000	$ 29,300,000
BCRED Verdelite JV LP | JV Partner
Schedule of Equity Method Investments [Line Items]
Committed contribution		21,000,000.0
Payments to acquire equity method investments		$ 16,800,000			$ 16,800,000	$ 16,800,000
Equity ownership percentage					12.50%	12.50%
Available capital contribution					$ 4,200,000	$ 4,200,000