v3.26.3
Warehouse Receivables & Warehouse Lines of Credit - Schedule of Warehouse Lines of Credit in Place (Details) - USD ($)
9 Months Ended
Oct. 13, 2026
Sep. 30, 2026
Sep. 13, 2026
Jul. 15, 2026
Feb. 10, 2026
Dec. 31, 2025
Dec. 04, 2025
Dec. 03, 2025
Warehouse Receivables And Warehouse Lines Of Credit [Line Items]                
Carrying Value   $ 936,000,000       $ 1,609,000,000    
Warehouse agreement borrowings                
Warehouse Receivables And Warehouse Lines Of Credit [Line Items]                
Maximum Facility Size   3,900,000,000       4,750,000,000    
Carrying Value   936,000,000       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   $ 52,000,000       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   $ 52,000,000       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   $ 300,000,000   $ 300,000,000   600,000,000    
Carrying Value   $ 0       131,000,000    
Committed line     $ 150,000,000          
Warehouse agreement borrowings | TD Bank | TD Bank, Pricing | Subsequent Event                
Warehouse Receivables And Warehouse Lines Of Credit [Line Items]                
Additional accordion option $ 150,000,000              
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) overnight index swap | Subsequent Event                
Warehouse Receivables And Warehouse Lines Of Credit [Line Items]                
Variable rate (as a percent) 1.20%              
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   $ 77,000,000       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   $ 755,000,000       $ 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%