SECURED FINANCING - Repurchase Agreements - Remaining Maturities, Collateral Types and Weighted Average Rate (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Repurchase Agreements:
Gross amounts	$ 70,072,146	$ 68,302,011
Amounts offset	(3,530,768)	(2,613,088)
Net amounts of Repurchase agreements as presented in the Consolidated Statements of Financial Condition	$ 66,541,378	$ 65,688,923	[1]
Repurchase agreements, remaining maturities, percentage	1.00%	1.00%
CRTs
Repurchase Agreements:
Gross amounts	$ 286,134	$ 569,011
Non-Agency Mortgage-Backed Securities
Repurchase Agreements:
Gross amounts	2,507,567	2,481,415
Residential Mortgage Loans
Repurchase Agreements:
Gross amounts	1,663,651	1,390,961
Agency Mortgage-Backed Securities
Repurchase Agreements:
Gross amounts	65,614,794	63,794,614
Commercial Mortgage-Backed Securities
Repurchase Agreements:
Gross amounts	0	66,010
1 day
Repurchase Agreements:
Gross amounts	27,312,141	0
1 day | CRTs
Repurchase Agreements:
Gross amounts	0	0
1 day | Non-Agency Mortgage-Backed Securities
Repurchase Agreements:
Gross amounts	60,497	0
1 day | Residential Mortgage Loans
Repurchase Agreements:
Gross amounts	0	0
1 day | Agency Mortgage-Backed Securities
Repurchase Agreements:
Gross amounts	27,251,644	0
1 day | Commercial Mortgage-Backed Securities
Repurchase Agreements:
Gross amounts	0	0
2 to 29 days
Repurchase Agreements:
Gross amounts	1,831,806	29,936,453
2 to 29 days | CRTs
Repurchase Agreements:
Gross amounts	286,134	405,341
2 to 29 days | Non-Agency Mortgage-Backed Securities
Repurchase Agreements:
Gross amounts	967,919	861,271
2 to 29 days | Residential Mortgage Loans
Repurchase Agreements:
Gross amounts	0	0
2 to 29 days | Agency Mortgage-Backed Securities
Repurchase Agreements:
Gross amounts	577,753	28,603,831
2 to 29 days | Commercial Mortgage-Backed Securities
Repurchase Agreements:
Gross amounts	0	66,010
30 to 59 days
Repurchase Agreements:
Gross amounts	12,906,755	35,545,924
30 to 59 days | CRTs
Repurchase Agreements:
Gross amounts	0	116,087
30 to 59 days | Non-Agency Mortgage-Backed Securities
Repurchase Agreements:
Gross amounts	672,983	682,037
30 to 59 days | Residential Mortgage Loans
Repurchase Agreements:
Gross amounts	0	251,357
30 to 59 days | Agency Mortgage-Backed Securities
Repurchase Agreements:
Gross amounts	12,233,772	34,496,443
30 to 59 days | Commercial Mortgage-Backed Securities
Repurchase Agreements:
Gross amounts	0	0
60 to 89 days
Repurchase Agreements:
Gross amounts	25,870,163	1,285,522
60 to 89 days | CRTs
Repurchase Agreements:
Gross amounts	0	47,583
60 to 89 days | Non-Agency Mortgage-Backed Securities
Repurchase Agreements:
Gross amounts	403,259	545,684
60 to 89 days | Residential Mortgage Loans
Repurchase Agreements:
Gross amounts	162,222	0
60 to 89 days | Agency Mortgage-Backed Securities
Repurchase Agreements:
Gross amounts	25,304,682	692,255
60 to 89 days | Commercial Mortgage-Backed Securities
Repurchase Agreements:
Gross amounts	0	0
90 to 119 days
Repurchase Agreements:
Gross amounts	300,230	62,468
90 to 119 days | CRTs
Repurchase Agreements:
Gross amounts	0	0
90 to 119 days | Non-Agency Mortgage-Backed Securities
Repurchase Agreements:
Gross amounts	54,150	60,383
90 to 119 days | Residential Mortgage Loans
Repurchase Agreements:
Gross amounts	0	0
90 to 119 days | Agency Mortgage-Backed Securities
Repurchase Agreements:
Gross amounts	246,080	2,085
90 to 119 days | Commercial Mortgage-Backed Securities
Repurchase Agreements:
Gross amounts	0	0
Over 119 days
Repurchase Agreements:
Gross amounts	1,851,051	1,471,644
Over 119 days | CRTs
Repurchase Agreements:
Gross amounts	0	0
Over 119 days | Non-Agency Mortgage-Backed Securities
Repurchase Agreements:
Gross amounts	348,759	332,040
Over 119 days | Residential Mortgage Loans
Repurchase Agreements:
Gross amounts	1,501,429	1,139,604
Over 119 days | Agency Mortgage-Backed Securities
Repurchase Agreements:
Gross amounts	863	0
Over 119 days | Commercial Mortgage-Backed Securities
Repurchase Agreements:
Gross amounts	$ 0	$ 0

[1] (1)Derived from the audited consolidated financial statements at December 31, 2024.