Home Equity Investments (HEI) - Schedule of Geographic Concentration of HEI (Details) - Geographic Concentration Risk - Investments Benchmark	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Unsecuritized HEI
Schedule of Equity Method Investments [Line Items]
Concentration risk (as a percent)	100.00%	100.00%
Unsecuritized HEI | California
Schedule of Equity Method Investments [Line Items]
Concentration risk (as a percent)	62.00%	49.00%
Unsecuritized HEI | Massachusetts
Schedule of Equity Method Investments [Line Items]
Concentration risk (as a percent)	7.00%
Unsecuritized HEI | Colorado
Schedule of Equity Method Investments [Line Items]
Concentration risk (as a percent)	6.00%	6.00%
Unsecuritized HEI | Washington
Schedule of Equity Method Investments [Line Items]
Concentration risk (as a percent)	6.00%	6.00%
Unsecuritized HEI | Florida
Schedule of Equity Method Investments [Line Items]
Concentration risk (as a percent)	4.00%	12.00%
Unsecuritized HEI | Arizona
Schedule of Equity Method Investments [Line Items]
Concentration risk (as a percent)	1.00%	5.00%
Unsecuritized HEI | New York
Schedule of Equity Method Investments [Line Items]
Concentration risk (as a percent)		4.00%
Unsecuritized HEI | Other States
Schedule of Equity Method Investments [Line Items]
Concentration risk (as a percent)	14.00%	18.00%
HEI held at consolidated HEI securitization entities
Schedule of Equity Method Investments [Line Items]
Concentration risk (as a percent)	100.00%	100.00%
HEI held at consolidated HEI securitization entities | California
Schedule of Equity Method Investments [Line Items]
Concentration risk (as a percent)	40.00%	47.00%
HEI held at consolidated HEI securitization entities | Massachusetts
Schedule of Equity Method Investments [Line Items]
Concentration risk (as a percent)	6.00%
HEI held at consolidated HEI securitization entities | Colorado
Schedule of Equity Method Investments [Line Items]
Concentration risk (as a percent)	4.00%	4.00%
HEI held at consolidated HEI securitization entities | Washington
Schedule of Equity Method Investments [Line Items]
Concentration risk (as a percent)	8.00%	7.00%
HEI held at consolidated HEI securitization entities | Florida
Schedule of Equity Method Investments [Line Items]
Concentration risk (as a percent)	9.00%	7.00%
HEI held at consolidated HEI securitization entities | Arizona
Schedule of Equity Method Investments [Line Items]
Concentration risk (as a percent)	9.00%	6.00%
HEI held at consolidated HEI securitization entities | New York
Schedule of Equity Method Investments [Line Items]
Concentration risk (as a percent)		7.00%
HEI held at consolidated HEI securitization entities | Other States
Schedule of Equity Method Investments [Line Items]
Concentration risk (as a percent)	24.00%	22.00%