FAIR VALUE MEASUREMENTS - Carrying Values and Fair Values of Financial Assets Recorded at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands		Sep. 30, 2025	Jun. 30, 2025	Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Dec. 31, 2023
Assets:
MSRs and MSR financing receivables		$ 10,389,766		$ 10,321,671
Government and government-backed securities		9,622,754		7,245,667
Residential mortgage loans, HFS	[1]	5,947,402		4,374,241
Residential mortgage loans, HFS, at fair value		5,888,611		4,307,571
Residential mortgage loans subject to repurchase		2,700,353		2,745,756	$ 2,409,992
Derivative and hedging assets		53,684		75,147
Notes receivable		449,507		393,786
Loans receivable		8,038		31,580
Other assets		2,639,938		2,311,979
Liabilities:
Derivative liabilities		101,789		52,610
MSR financing liability, at fair value		69,034		101,088
Notes receivable financing liability		375,685		371,788
RTL financing liability, at fair value		87,717		0
Recurring Basis
Assets:
Excess MSRs, principal balance		49,260,027		53,494,378
MSRs and MSR financing receivables, principal balance		596,093,013		590,214,351
Servicer advance investments, principal balance		264,921		298,945
Government and government-backed securities, principal balance		8,585,928		9,947,189
Non-Agency Securities, Principal Balance		8,618,043		8,962,730
Residential mortgage loans, HFS, principal balance		65,743		75,872
Residential mortgage loans, HFS, at fair value, principal balance		5,763,203		4,274,620
Residential mortgage loans, HFI, at fair value, principal balance		360,448		396,061
Residential mortgage loans subject to repurchase, principal balance		2,700,353		2,745,756
Consumer loans, principal balance		730,184		767,623
Derivative and hedging assets, principal balance		22,646,931		18,597,732
Mortgage loans receivable, principal balance		2,572,891		2,172,713
Notes receivable, principal balance		539,910		487,276
Loans receivable, principal balance		8,038		31,580
Equity investment, at fair value, principal balance		192,500		192,500
CLOs, principal balance		365,153		243,355
Investments of consolidated entities - funds, principal balance		1,412,589		1,108,903
Investments of consolidated entities - loan securitizations, principal balance		4,090,592		3,900,428
Liabilities:
Secured financing agreements, principal balance		16,540,707		16,784,505
Secured notes and bonds payable, principal balance		9,597,963		10,353,561
Unsecured notes, net of issuance costs, principal balance		1,512,940		1,302,492
Residential mortgage loan repurchase liability, principal balance		2,700,353		2,745,756
Derivative liabilities, principal balance		16,202,262		11,255,492
MSR financing liability, principal balance		8,361,854		15,271,757
Notes receivable financing liability, principal balance		371,446		371,446
RTL financing liability, principal balance		87,717
Notes payable and secured financing of consolidated entities - funds, principal balance		1,216,181		1,182,640
Notes payable of consolidated entities - loan securitizations, principal balance		3,578,414		3,402,823
Recurring Basis | Asset-Backed Securities Issued
Liabilities:
Fair value, measurement with unobservable inputs reconciliation, recurring basis, liability value		153,000		185,500
Recurring Basis | Level 3
Liabilities:
Fair value, measurement with unobservable inputs reconciliation, recurring basis, liability value		1,783,382	$ 1,690,205	2,482,756	1,757,439	$ 1,347,594	$ 772,925
Recurring Basis | Level 3 | Asset-Backed Securities Issued
Liabilities:
Fair value, measurement with unobservable inputs reconciliation, recurring basis, liability value		153,019	$ 160,433	185,460	$ 197,234	$ 205,286	$ 235,770
Recurring Basis | Carrying Value
Assets:
Excess MSRs		334,668		369,162
MSRs and MSR financing receivables		10,389,766		10,321,671
Servicer advance investments		302,278		339,646
Government and government-backed securities		8,562,825		9,736,116
Non-Agency Securities		721,445		552,797
Residential mortgage loans, HFS		58,791		66,670
Residential mortgage loans, HFS, at fair value		5,888,611		4,307,571
Residential mortgage loans, HFI, at fair value		334,589		361,890
Residential mortgage loans subject to repurchase		2,700,353		2,745,756
Consumer loans		598,147		665,565
Derivative and hedging assets		53,684		75,147
Mortgage loans receivable		2,575,354		2,178,075
Notes receivable		449,507		393,786
Loans receivable		8,038		31,580
Equity investment, at fair value		194,313		194,410
CLOs		363,274		242,227
Investments of consolidated entities - funds		1,427,623		1,118,359
Investments of consolidated entities - loan securitizations		4,010,477		3,753,219
Other assets		212,731		113,224
Assets, fair value		39,186,474		37,566,871
Liabilities:
Secured financing agreements		16,538,685		16,782,467
Secured notes and bonds payable		9,545,280		10,298,075
Unsecured notes, net of issuance costs		1,417,676		1,204,220
Residential mortgage loan repurchase liability		2,700,353		2,745,756
Derivative liabilities		101,789		52,610
MSR financing liability, at fair value		69,034		101,088
Notes receivable financing liability		375,685		371,788
RTL financing liability, at fair value		87,717
Notes payable and secured financing of consolidated entities - funds		1,214,220		959,958
Notes payable of consolidated entities - loan securitizations		3,474,605		3,228,957
Liabilities, fair value		35,525,044		35,744,919
Recurring Basis | Fair Value
Assets:
Excess MSRs		334,668		369,162
MSRs and MSR financing receivables		10,389,766		10,321,671
Servicer advance investments		302,278		339,646
Government and government-backed securities		8,562,823		9,736,121
Non-Agency Securities		721,445		552,797
Residential mortgage loans, HFS		58,791		66,670
Residential mortgage loans, HFS, at fair value		5,888,611		4,307,571
Residential mortgage loans, HFI, at fair value		334,589		361,890
Residential mortgage loans subject to repurchase		2,700,353		2,745,756
Consumer loans		598,147		665,565
Derivative and hedging assets		53,684		75,147
Mortgage loans receivable		2,575,354		2,178,075
Notes receivable		449,507		393,786
Loans receivable		8,038		31,580
Equity investment, at fair value		194,313		194,410
CLOs		363,274		242,227
Investments of consolidated entities - funds		1,427,623		1,118,359
Investments of consolidated entities - loan securitizations		4,010,477		3,753,219
Other assets		212,731		113,224
Assets, fair value		39,186,472		37,566,876
Liabilities:
Secured financing agreements		16,542,384		16,787,036
Secured notes and bonds payable		9,560,799		10,318,385
Unsecured notes, net of issuance costs		1,449,399		1,229,408
Residential mortgage loan repurchase liability		2,700,353		2,745,756
Derivative liabilities		101,789		52,610
MSR financing liability, at fair value		69,034		101,088
Notes receivable financing liability		380,439		377,227
RTL financing liability, at fair value		87,717
Notes payable and secured financing of consolidated entities - funds		1,214,220		959,958
Notes payable of consolidated entities - loan securitizations		3,474,605		3,228,957
Liabilities, fair value		35,580,739		35,800,425
Recurring Basis | Fair Value | Level 1
Assets:
Excess MSRs		0		0
MSRs and MSR financing receivables		0		0
Servicer advance investments		0		0
Government and government-backed securities		24,788		3,285,478
Non-Agency Securities		0		0
Residential mortgage loans, HFS		0		0
Residential mortgage loans, HFS, at fair value		0		0
Residential mortgage loans, HFI, at fair value		0		0
Residential mortgage loans subject to repurchase		0		0
Consumer loans		0		0
Derivative and hedging assets		0		0
Mortgage loans receivable		0		0
Notes receivable		0		0
Loans receivable		0		0
Equity investment, at fair value		0		0
CLOs		0		0
Investments of consolidated entities - funds		0		0
Investments of consolidated entities - loan securitizations		0		0
Other assets		123,218		17,831
Assets, fair value		148,006		3,303,309
Liabilities:
Secured financing agreements		0		0
Secured notes and bonds payable		0		0
Unsecured notes, net of issuance costs		0		0
Residential mortgage loan repurchase liability		0		0
Derivative liabilities		14		1,259
MSR financing liability, at fair value		0		0
Notes receivable financing liability		0		0
RTL financing liability, at fair value		0
Notes payable and secured financing of consolidated entities - funds		0		0
Notes payable of consolidated entities - loan securitizations		0		0
Liabilities, fair value		14		1,259
Recurring Basis | Fair Value | Level 1 | US Treasury Bill Securities
Liabilities:
Amortized cost		24,800		24,800
Recurring Basis | Fair Value | Level 2
Assets:
Excess MSRs		0		0
MSRs and MSR financing receivables		0		0
Servicer advance investments		0		0
Government and government-backed securities		8,538,035		6,450,643
Non-Agency Securities		0		0
Residential mortgage loans, HFS		0		0
Residential mortgage loans, HFS, at fair value		5,863,074		4,280,405
Residential mortgage loans, HFI, at fair value		0		0
Residential mortgage loans subject to repurchase		2,700,353		2,745,756
Consumer loans		0		0
Derivative and hedging assets		17,111		53,651
Mortgage loans receivable		0		0
Notes receivable		0		0
Loans receivable		0		0
Equity investment, at fair value		0		0
CLOs		351,838		217,049
Investments of consolidated entities - funds		782,310		0
Investments of consolidated entities - loan securitizations		3,051,688		2,791,027
Other assets		0		0
Assets, fair value		21,304,409		16,538,531
Liabilities:
Secured financing agreements		16,283,814		16,611,477
Secured notes and bonds payable		0		0
Unsecured notes, net of issuance costs		0		0
Residential mortgage loan repurchase liability		2,700,353		2,745,756
Derivative liabilities		54,254		15,628
MSR financing liability, at fair value		0		0
Notes receivable financing liability		0		0
RTL financing liability, at fair value		0
Notes payable and secured financing of consolidated entities - funds		987,573		0
Notes payable of consolidated entities - loan securitizations		2,608,079		2,369,934
Liabilities, fair value		22,634,073		21,742,795
Recurring Basis | Fair Value | Level 3
Assets:
Excess MSRs		334,668		369,162
MSRs and MSR financing receivables		10,389,766		10,321,671
Servicer advance investments		302,278		339,646
Government and government-backed securities		0		0
Non-Agency Securities		721,445		552,797
Residential mortgage loans, HFS		58,791		66,670
Residential mortgage loans, HFS, at fair value		25,537		27,166
Residential mortgage loans, HFI, at fair value		334,589		361,890
Residential mortgage loans subject to repurchase		0		0
Consumer loans		598,147		665,565
Derivative and hedging assets		36,573		21,496
Mortgage loans receivable		2,575,354		2,178,075
Notes receivable		449,507		393,786
Loans receivable		8,038		31,580
Equity investment, at fair value		194,313		194,410
CLOs		11,436		25,178
Investments of consolidated entities - funds		297,163		785,253
Investments of consolidated entities - loan securitizations		958,789		962,192
Other assets		89,513		95,393
Assets, fair value		17,385,907		17,391,930
Liabilities:
Secured financing agreements		258,570		175,559
Secured notes and bonds payable		9,560,799		10,318,385
Unsecured notes, net of issuance costs		1,449,399		1,229,408
Residential mortgage loan repurchase liability		0		0
Derivative liabilities		47,521		35,723
MSR financing liability, at fair value		69,034		101,088
Notes receivable financing liability		380,439		377,227
RTL financing liability, at fair value		87,717
Notes payable and secured financing of consolidated entities - funds		226,647		959,958
Notes payable of consolidated entities - loan securitizations		866,526		859,023
Liabilities, fair value		12,946,652		14,056,371
Recurring Basis | Fair Value | NAV
Assets:
Equity investment, at fair value		0
Investments of consolidated entities - funds		348,150		333,106
Assets, fair value		348,150		333,106
Liabilities:
Liabilities, fair value		$ 0		$ 0

[1] The Company's consolidated balance sheets include assets and liabilities of consolidated variable interest entities (“VIEs”) and certain other consolidated VIEs, including funds and collateralized financing entities (“CFEs”) that are presented separately within assets and liabilities of consolidated entities. VIE assets can only be used to settle obligations and liabilities of the VIEs. VIE creditors do not have recourse to Rithm Capital Corp. As of September 30, 2025 and December 31, 2024, total assets of such consolidated VIEs were $7.1 billion and $6.3 billion, respectively, and total liabilities of such consolidated VIEs were $5.6 billion and $5.2 billion, respectively. See Note 20 for further details.