FAIR VALUE MEASUREMENTS - Financial Assets Measured at Fair Value on a Recurring Basis using Level 3 Inputs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Purchases, sales and repayments
Purchases, net		$ 4,761,020
Non-Agency
Gains (losses) included in net income
Gain (loss) on settlement of investments, net	$ (28,500)	(953,500)
Excess MSRs Investees
Purchases, sales and repayments
New Residential’s percentage ownership	50.00%
Recurring Basis | Level 3
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning	$ 10,473,953	20,139,743
Transfers
Transfers from Level 3	0	(718,892)
Transfers to Level 3	2,386	445,040
Acquisitions (Note 3)	(3,129,562)
Gains (losses) included in net income
Reversal (provision) for credit losses on securities	5,201	(13,404)
Change in fair value of Excess MSRs	(15,078)	(32,464)
Change in fair value of Excess MSRs, equity method investees	1,818	(6,978)
Servicing revenue, net	(513,686)	(2,183,073)
Change in fair value of servicer advance investments	(9,076)	763
Change in fair value of residential mortgage loans	155,758	(107,604)
Gain (loss) on settlement of investments, net	(28,146)	(953,407)
Other income (loss), net	(306,078)	(80,733)
Gains (losses) included in other comprehensive income	28,882	(300,467)
Interest income	64,072	207,453
Purchases, sales and repayments
Purchases, net	5,635,602
Proceeds from sales	(3,904,136)	(8,697,830)
Proceeds from repayments	(2,517,922)	(2,649,940)
Originations and other	1,633,590	664,726
Balance, ending	13,425,847	10,473,953
Recurring Basis | Level 3 | Servicer Advance Investments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning	538,056	581,777
Transfers
Transfers from Level 3	0	0
Transfers to Level 3	0	0
Acquisitions (Note 3)	0
Gains (losses) included in net income
Reversal (provision) for credit losses on securities	0	0
Change in fair value of Excess MSRs	0	0
Change in fair value of Excess MSRs, equity method investees	0	0
Servicing revenue, net	0	0
Change in fair value of servicer advance investments	(9,076)	763
Change in fair value of residential mortgage loans	0	0
Gain (loss) on settlement of investments, net	0	0
Other income (loss), net	0	0
Gains (losses) included in other comprehensive income	0	0
Interest income	1,678	18,182
Purchases, sales and repayments
Purchases, net	1,286,526	1,294,757
Proceeds from sales	0	0
Proceeds from repayments	(1,395,377)	(1,357,423)
Originations and other	0	0
Balance, ending	421,807	538,056
Recurring Basis | Level 3 | Excess MSRs
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning	410,855	505,343
Transfers
Transfers from Level 3	0	0
Transfers to Level 3	0	0
Acquisitions (Note 3)	0
Gains (losses) included in net income
Reversal (provision) for credit losses on securities	0	0
Change in fair value of Excess MSRs	(15,078)	(16,232)
Change in fair value of Excess MSRs, equity method investees	1,818	(3,489)
Servicing revenue, net	0	0
Change in fair value of servicer advance investments	0	0
Change in fair value of residential mortgage loans	0	0
Gain (loss) on settlement of investments, net	404	67
Other income (loss), net	(326)	(12,190)
Gains (losses) included in other comprehensive income	0	0
Interest income	20,296	28,352
Purchases, sales and repayments
Purchases, net	0	0
Proceeds from sales	(984)	(1,061)
Proceeds from repayments	(72,038)	(89,935)
Originations and other	0	0
Balance, ending	344,947	410,855
Recurring Basis | Level 3 | MSRs And MSR Financing Receivables
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning	4,585,841	5,686,233
Transfers
Transfers from Level 3	0	0
Transfers to Level 3	0	0
Acquisitions (Note 3)	(1,507,524)
Gains (losses) included in net income
Reversal (provision) for credit losses on securities	0	0
Change in fair value of Excess MSRs	0	0
Change in fair value of Excess MSRs, equity method investees	0	0
Servicing revenue, net	(513,686)	(2,183,073)
Change in fair value of servicer advance investments	0	0
Change in fair value of residential mortgage loans	0	0
Gain (loss) on settlement of investments, net	0	0
Other income (loss), net	0	0
Gains (losses) included in other comprehensive income	0	0
Interest income	0	0
Purchases, sales and repayments
Purchases, net	10,949	431,608
Proceeds from sales	(63,451)	(15,341)
Proceeds from repayments	0	0
Originations and other	1,331,626	666,414
Balance, ending	6,858,803	4,585,841
Recurring Basis | Level 3 | Non-Agency
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning	1,180,924	7,957,785
Transfers
Transfers from Level 3	0	0
Transfers to Level 3	0	0
Acquisitions (Note 3)	0
Gains (losses) included in net income
Reversal (provision) for credit losses on securities	5,201	(13,404)
Change in fair value of Excess MSRs	0	0
Change in fair value of Excess MSRs, equity method investees	0	0
Servicing revenue, net	0	0
Change in fair value of servicer advance investments	0	0
Change in fair value of residential mortgage loans	0	0
Gain (loss) on settlement of investments, net	(28,550)	(953,541)
Other income (loss), net	9,136	(42,506)
Gains (losses) included in other comprehensive income	28,882	(580,102)
Interest income	13,740	105,373
Purchases, sales and repayments
Purchases, net	174,340	575,030
Proceeds from sales	(164,630)	(5,288,480)
Proceeds from repayments	(267,101)	(577,543)
Originations and other	0	(1,688)
Balance, ending	951,942	1,180,924
Recurring Basis | Level 3 | Derivatives
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning	289,074	39,891
Transfers
Transfers from Level 3	0	0
Transfers to Level 3	0	0
Acquisitions (Note 3)	(116,403)
Gains (losses) included in net income
Reversal (provision) for credit losses on securities	0	0
Change in fair value of Excess MSRs	0	0
Change in fair value of Excess MSRs, equity method investees	0	0
Servicing revenue, net	0	0
Change in fair value of servicer advance investments	0	0
Change in fair value of residential mortgage loans	0	0
Gain (loss) on settlement of investments, net	0	0
Other income (loss), net	(293,699)	0
Gains (losses) included in other comprehensive income	0	249,183
Interest income	0	0
Purchases, sales and repayments
Purchases, net	0	0
Proceeds from sales	0	0
Proceeds from repayments	0	0
Originations and other	0	0
Balance, ending	111,778	289,074
Recurring Basis | Level 3 | Residential Mortgage Loans
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning	2,320,384	3,998,825
Transfers
Transfers from Level 3	0	(718,892)
Transfers to Level 3	2,386	445,040
Acquisitions (Note 3)	0
Gains (losses) included in net income
Reversal (provision) for credit losses on securities	0	0
Change in fair value of Excess MSRs	0	0
Change in fair value of Excess MSRs, equity method investees	0	0
Servicing revenue, net	0	0
Change in fair value of servicer advance investments	0	0
Change in fair value of residential mortgage loans	155,758	(107,604)
Gain (loss) on settlement of investments, net	0	0
Other income (loss), net	(1,357)	(8,276)
Gains (losses) included in other comprehensive income	0	(6,020)
Interest income	0	0
Purchases, sales and repayments
Purchases, net	4,128,097	2,415,084
Proceeds from sales	(3,675,071)	(3,391,887)
Proceeds from repayments	(487,830)	(305,886)
Originations and other	(19,030)	0
Balance, ending	2,423,337	2,320,384
Recurring Basis | Level 3 | Consumer Loans
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning	685,575	827,545
Transfers
Transfers from Level 3	0	0
Transfers to Level 3	0	0
Acquisitions (Note 3)	0
Gains (losses) included in net income
Reversal (provision) for credit losses on securities	0	0
Change in fair value of Excess MSRs	0	0
Change in fair value of Excess MSRs, equity method investees	0	0
Servicing revenue, net	0	0
Change in fair value of servicer advance investments	0	0
Change in fair value of residential mortgage loans	0	0
Gain (loss) on settlement of investments, net	0	0
Other income (loss), net	(20,133)	(6,385)
Gains (losses) included in other comprehensive income	0	36,472
Interest income	18,925	24,120
Purchases, sales and repayments
Purchases, net	29,002	33,041
Proceeds from sales	0	0
Proceeds from repayments	(206,078)	(229,218)
Originations and other	0	0
Balance, ending	507,291	685,575
Recurring Basis | Level 3 | Notes and Loans Receivable
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning	52,389	37,001
Transfers
Transfers from Level 3	0	0
Transfers to Level 3	0	0
Acquisitions (Note 3)	0
Gains (losses) included in net income
Reversal (provision) for credit losses on securities	0	0
Change in fair value of Excess MSRs	0	0
Change in fair value of Excess MSRs, equity method investees	0	0
Servicing revenue, net	0	0
Change in fair value of servicer advance investments	0	0
Change in fair value of residential mortgage loans	0	0
Gain (loss) on settlement of investments, net	0	0
Other income (loss), net	301	814
Gains (losses) included in other comprehensive income	0	0
Interest income	9,433	3,074
Purchases, sales and repayments
Purchases, net	6,688	11,500
Proceeds from sales	0	0
Proceeds from repayments	(28,631)	0
Originations and other	250,000	0
Balance, ending	290,180	52,389
Recurring Basis | Level 3 | Mortgage Loans Receivable
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning	0	0
Transfers
Transfers from Level 3	0	0
Transfers to Level 3	0	0
Acquisitions (Note 3)	(1,505,635)
Gains (losses) included in net income
Reversal (provision) for credit losses on securities	0	0
Change in fair value of Excess MSRs	0	0
Change in fair value of Excess MSRs, equity method investees	0	0
Servicing revenue, net	0	0
Change in fair value of servicer advance investments	0	0
Change in fair value of residential mortgage loans	0	0
Gain (loss) on settlement of investments, net	0	0
Other income (loss), net	0	0
Gains (losses) included in other comprehensive income	0	0
Interest income	0	0
Purchases, sales and repayments
Purchases, net	0	0
Proceeds from sales	0	0
Proceeds from repayments	(60,867)	0
Originations and other	70,994	0
Balance, ending	$ 1,515,762	$ 0