v3.26.1
Warehouse Receivables & Warehouse Lines of Credit - Schedule of Warehouse Lines of Credit in Place (Details) - USD ($)
 6 Months Ended
Jun. 30, 2026
Feb. 10, 2026
Dec. 31, 2025
Dec. 04, 2025
Dec. 03, 2025
Warehouse Receivables And Warehouse Lines Of Credit [Line Items]          
Carrying Value $ 711,000,000   $ 1,609,000,000    
Warehouse agreement borrowings          
Warehouse Receivables And Warehouse Lines Of Credit [Line Items]          
Maximum Facility Size 4,200,000,000   4,750,000,000    
Carrying Value 711,000,000   1,609,000,000    
Warehouse agreement borrowings | JP Morgan | JP Morgan Chase Bank, N.A. (JP Morgan), Pricing          
Warehouse Receivables And Warehouse Lines Of Credit [Line Items]          
Maximum Facility Size 1,325,000,000   1,325,000,000    
Carrying Value $ 90,000,000   804,000,000    
Warehouse agreement borrowings | JP Morgan | JP Morgan Chase Bank, N.A. (JP Morgan), Pricing | Secured overnight financing rate (SOFR) overnight index swap          
Warehouse Receivables And Warehouse Lines Of Credit [Line Items]          
Variable rate (as a percent) 1.35%        
Warehouse agreement borrowings | JP Morgan | JP Morgan (Bridge Loans)          
Warehouse Receivables And Warehouse Lines Of Credit [Line Items]          
Maximum Facility Size $ 25,000,000   25,000,000    
Carrying Value $ 0   0    
Warehouse agreement borrowings | JP Morgan | JP Morgan (Bridge Loans) | Secured overnight financing rate (SOFR) overnight index swap          
Warehouse Receivables And Warehouse Lines Of Credit [Line Items]          
Variable rate (as a percent) 2.00%        
Warehouse agreement borrowings | JP Morgan | JP Morgan (Business Lending Activity)          
Warehouse Receivables And Warehouse Lines Of Credit [Line Items]          
Maximum Facility Size   $ 15,000,000      
Warehouse agreement borrowings | Fannie Mae ASAP Program | Fannie Mae Multifamily ASAP Program, Pricing          
Warehouse Receivables And Warehouse Lines Of Credit [Line Items]          
Maximum Facility Size $ 650,000,000   1,200,000,000 $ 1,200,000,000 $ 650,000,000
Carrying Value $ 133,000,000   221,000,000    
Warehouse agreement borrowings | Fannie Mae ASAP Program | Fannie Mae Multifamily ASAP Program, Pricing | Maximum | Secured overnight financing rate (SOFR) overnight index swap          
Warehouse Receivables And Warehouse Lines Of Credit [Line Items]          
Variable rate (as a percent) 1.35%        
Warehouse agreement borrowings | Fannie Mae ASAP Program | Fannie Mae Multifamily ASAP Program, Pricing | Minimum | Secured overnight financing rate (SOFR) overnight index swap          
Warehouse Receivables And Warehouse Lines Of Credit [Line Items]          
Variable rate (as a percent) 0.25%        
Warehouse agreement borrowings | TD Bank | TD Bank, Pricing          
Warehouse Receivables And Warehouse Lines Of Credit [Line Items]          
Maximum Facility Size $ 600,000,000   600,000,000    
Carrying Value $ 13,000,000   131,000,000    
Warehouse agreement borrowings | TD Bank | TD Bank, Pricing | Secured overnight financing rate (SOFR) overnight index swap          
Warehouse Receivables And Warehouse Lines Of Credit [Line Items]          
Variable rate (as a percent) 1.25%        
Warehouse agreement borrowings | TD Bank | TD Bank, Pricing | Secured Overnight Financing Rate (SOFR) Adjustment          
Warehouse Receivables And Warehouse Lines Of Credit [Line Items]          
Variable rate (as a percent) 0.10%        
Warehouse agreement borrowings | Bank of America (BofA) | Bank of America, Pricing          
Warehouse Receivables And Warehouse Lines Of Credit [Line Items]          
Maximum Facility Size $ 350,000,000   350,000,000    
Carrying Value $ 24,000,000   335,000,000    
Warehouse agreement borrowings | Bank of America (BofA) | Bank of America, Pricing | Secured overnight financing rate (SOFR) overnight index swap          
Warehouse Receivables And Warehouse Lines Of Credit [Line Items]          
Variable rate (as a percent) 1.20%        
Warehouse agreement borrowings | Bank of America (BofA) | BofA, pricing          
Warehouse Receivables And Warehouse Lines Of Credit [Line Items]          
Maximum Facility Size $ 250,000,000   250,000,000    
Carrying Value $ 0   0    
Warehouse agreement borrowings | Bank of America (BofA) | BofA, pricing | Secured overnight financing rate (SOFR) overnight index swap          
Warehouse Receivables And Warehouse Lines Of Credit [Line Items]          
Variable rate (as a percent) 1.20%        
Warehouse agreement borrowings | Scotia Bank | Scotia Bank, Pricing          
Warehouse Receivables And Warehouse Lines Of Credit [Line Items]          
Maximum Facility Size $ 1,000,000,000   1,000,000,000    
Carrying Value $ 451,000,000   $ 118,000,000    
Warehouse agreement borrowings | Scotia Bank | Scotia Bank, Pricing | Secured overnight financing rate (SOFR) overnight index swap          
Warehouse Receivables And Warehouse Lines Of Credit [Line Items]          
Variable rate (as a percent) 1.30%