v3.26.1
Borrowings - Schedule of Secured Facilities (Details) - USD ($)
 6 Months Ended 12 Months Ended
Jun. 30, 2026
Dec. 31, 2025
Aug. 07, 2026
Secured financing | Master Repurchase Agreement Due Sept 16 2027      
Line of Credit Facility [Line Items]      
Line Amount $ 1,000,000,000    
Committed Line Amount 100,000,000    
Outstanding balance 973,000,000 $ 983,000,000  
Secured financing | Master Repurchase Agreement Due April 23 2027      
Line of Credit Facility [Line Items]      
Line Amount 1,500,000,000    
Committed Line Amount 250,000,000    
Outstanding balance $ 1,059,000,000 437,000,000  
Facility term (in months) 12 months    
Extension term (in months) 3 months    
Timing option for extending facility (in months) 3 months    
Secured financing | Master Repurchase Agreement Due December 17 2027      
Line of Credit Facility [Line Items]      
Line Amount $ 2,500,000,000    
Committed Line Amount 250,000,000    
Outstanding balance 752,000,000 1,617,000,000  
Secured financing | Master Repurchase Agreement Due May 27 2026      
Line of Credit Facility [Line Items]      
Line Amount 2,500,000,000    
Committed Line Amount 500,000,000    
Outstanding balance 1,544,000,000 1,475,000,000  
Secured financing | Master Repurchase Agreement Due September 03 2027      
Line of Credit Facility [Line Items]      
Line Amount 1,000,000,000    
Committed Line Amount 100,000,000    
Outstanding balance 594,000,000 476,000,000  
Secured financing | Master Repurchase Agreement Due November 26 2027      
Line of Credit Facility [Line Items]      
Line Amount 1,500,000,000    
Committed Line Amount 100,000,000    
Outstanding balance 1,468,000,000 1,452,000,000  
Secured financing | Master Repurchase Agreement Due June 11 2027      
Line of Credit Facility [Line Items]      
Line Amount 3,000,000,000    
Committed Line Amount 250,000,000    
Outstanding balance 2,657,000,000 2,834,000,000  
Secured financing | Master Repurchase Agreement Due June 11 2027      
Line of Credit Facility [Line Items]      
Line Amount 1,500,000,000    
Committed Line Amount 150,000,000    
Outstanding balance 1,457,000,000 1,453,000,000  
Secured financing | Master Repurchase Agreement Due May 26 2028      
Line of Credit Facility [Line Items]      
Line Amount 1,500,000,000    
Committed Line Amount 200,000,000    
Outstanding balance 652,000,000 615,000,000  
Secured financing | Master Repurchase Agreement Due November 27 2026      
Line of Credit Facility [Line Items]      
Line Amount 500,000,000    
Committed Line Amount 0    
Outstanding balance 41,000,000 30,000,000  
Secured financing | Master Repurchase Agreement Due Sep 30 2027      
Line of Credit Facility [Line Items]      
Line Amount 1,200,000,000    
Committed Line Amount 0    
Outstanding balance 137,000,000 145,000,000  
Secured financing | Master Repurchase Agreement Due Sep 30 2027 | Mortgages      
Line of Credit Facility [Line Items]      
Line Amount 950,000,000    
Secured financing | Master Repurchase Agreement , Mortgage Loans Held for Sale1      
Line of Credit Facility [Line Items]      
Outstanding balance   107,000,000  
Secured financing | Master Repurchase Agreement Due July 12, 2026      
Line of Credit Facility [Line Items]      
Line Amount 200,000,000    
Committed Line Amount 30,000,000    
Outstanding balance 54,000,000 46,000,000  
Secured financing | Master Repurchase Agreement Due July 24, 2026      
Line of Credit Facility [Line Items]      
Line Amount 100,000,000    
Committed Line Amount 0    
Outstanding balance 14,000,000 16,000,000  
Secured financing | Master Repurchase Agreement Due Mar 26 2027      
Line of Credit Facility [Line Items]      
Line Amount 750,000,000    
Committed Line Amount 100,000,000    
Outstanding balance 626,000,000 514,000,000  
Secured financing | Master Repurchase Agreement Due July 10, 2026      
Line of Credit Facility [Line Items]      
Line Amount 1,000,000,000    
Committed Line Amount 50,000,000    
Outstanding balance 485,000,000 234,000,000  
Secured financing | Master Repurchase Agreement Due July 10, 2026 | Subsequent Event      
Line of Credit Facility [Line Items]      
Line Amount     $ 1,000,000,000
Committed Line Amount     250,000,000
Secured financing | Master Repurchase Agreement Due Nov 18 2026      
Line of Credit Facility [Line Items]      
Line Amount 1,000,000,000    
Committed Line Amount 0    
Outstanding balance 793,000,000 364,000,000  
Secured financing | Master Repurchase Agreement Due Dec 23 2026      
Line of Credit Facility [Line Items]      
Line Amount 200,000,000    
Committed Line Amount 0    
Outstanding balance 0 0  
Secured financing | Master Repurchase Agreement , Mortgage Loans Held for Sale 2      
Line of Credit Facility [Line Items]      
Outstanding balance   0  
Secured financing | Early Funding Facility, One      
Line of Credit Facility [Line Items]      
Line Amount 5,000,000,000    
Committed Line Amount 0    
Early funding facilities 424,000,000 575,000,000  
Secured financing | Early Funding Facility, Two      
Line of Credit Facility [Line Items]      
Line Amount 2,000,000,000    
Committed Line Amount 0    
Early funding facilities $ 255,000,000 478,000,000  
Timing for review of agreement (in days) 90 days    
Secured financing | MRA Funding      
Line of Credit Facility [Line Items]      
Line Amount $ 27,950,000,000    
Committed Line Amount 2,080,000,000    
Outstanding balance 13,985,000,000 13,851,000,000  
MSR and advance facilities | Mortgage Serving Rights Line of Credit Maturing 1      
Line of Credit Facility [Line Items]      
Outstanding Balance   0  
MSR and advance facilities | Mortgage Serving Rights Line of Credit Maturing Sep 30 2027      
Line of Credit Facility [Line Items]      
Line Amount 950,000,000    
Committed Line Amount 0    
Outstanding Balance 0 150,000,000  
MSR and advance facilities | Mortgage Serving Rights Line of Credit Maturing 2      
Line of Credit Facility [Line Items]      
Outstanding Balance   0  
MSR and advance facilities | Mortgage Serving Rights Line of Credit Maturing Apr 02 2027      
Line of Credit Facility [Line Items]      
Line Amount 1,750,000,000    
Committed Line Amount 700,000,000    
Outstanding Balance 225,000,000 700,000,000  
MSR and advance facilities | Mortgage Serving Rights Line of Credit Maturing Apr 02 2027 | Subsequent Event      
Line of Credit Facility [Line Items]      
Line Amount     2,000,000,000
Committed Line Amount     $ 700,000,000
MSR and advance facilities | Mortgage Serving Rights Line of Credit Maturing Jul 20 2027      
Line of Credit Facility [Line Items]      
Line Amount 875,000,000    
Committed Line Amount 875,000,000    
Outstanding Balance 0 450,000,000  
MSR and advance facilities | Mortgage Serving Rights Line of Credit Maturing APR 01 2027      
Line of Credit Facility [Line Items]      
Line Amount 500,000,000    
Committed Line Amount 0    
Outstanding Balance 250,000,000 360,000,000  
MSR and advance facilities | Mortgage Serving Rights Line Of Credit Maturing Jul 23 2027      
Line of Credit Facility [Line Items]      
Line Amount 500,000,000    
Committed Line Amount 150,000,000    
Outstanding Balance 100,000,000 150,000,000  
MSR and advance facilities | Mortgage Serving Rights Line Of Credit Maturing Jul 17 2027      
Line of Credit Facility [Line Items]      
Line Amount 500,000,000    
Committed Line Amount 250,000,000    
Outstanding Balance 100,000,000 310,000,000  
MSR and advance facilities | Mortgage Serving Rights Line Of Credit Maturing Jul 25 2027      
Line of Credit Facility [Line Items]      
Line Amount 1,500,000,000    
Committed Line Amount 1,200,000,000    
Outstanding Balance 340,000,000 440,000,000  
MSR and advance facilities | Mortgage Serving Rights Line Of Credit Maturing Jun 27 2027      
Line of Credit Facility [Line Items]      
Line Amount 500,000,000    
Committed Line Amount 250,000,000    
Outstanding Balance 265,000,000 265,000,000  
MSR and advance facilities | Mortgage Serving Rights Line Of Credit Maturing Jun 25 2027      
Line of Credit Facility [Line Items]      
Line Amount 300,000,000    
Committed Line Amount 0    
Outstanding Balance 150,000,000 150,000,000  
MSR and advance facilities | Advance Facility Line Of Credit Maturing Jul 25 2027      
Line of Credit Facility [Line Items]      
Line Amount 1,500,000,000    
Advance facility | Master Repurchase Agreement Due July 12, 2026      
Line of Credit Facility [Line Items]      
Line Amount 30,000,000    
Advance facility | Advance Facility Line Of Credit Maturing May 26 2028      
Line of Credit Facility [Line Items]      
Line Amount 850,000,000    
Committed Line Amount 700,000,000    
Outstanding Balance 414,000,000 364,000,000  
Advance facility | Advance Facility Line Of Credit Maturing Jul 12 2026      
Line of Credit Facility [Line Items]      
Line Amount 30,000,000    
Committed Line Amount 30,000,000    
Outstanding Balance 15,000,000 1,000,000  
Advance facility | Advance Facility Line Of Credit Maturing Dec 1 2027      
Line of Credit Facility [Line Items]      
Line Amount 350,000,000    
Committed Line Amount 100,000,000    
Outstanding Balance 89,000,000 99,000,000  
Advance facility | Advance Facility Line Of Credit Maturing Jul 25 2027      
Line of Credit Facility [Line Items]      
Line Amount 500,000,000    
Committed Line Amount 500,000,000    
Outstanding Balance 359,000,000 342,000,000  
Personal loan funding | Personal Loans Held for Sale Maturing August 19 2027      
Line of Credit Facility [Line Items]      
Line Amount 200,000,000    
Committed Line Amount 200,000,000    
Outstanding Balance 43,000,000 63,000,000  
Personal loan funding | Personal Loans Held for Sale Maturing November 21 2028      
Line of Credit Facility [Line Items]      
Line Amount 150,000,000    
Committed Line Amount 75,000,000    
Outstanding Balance 38,000,000 17,000,000  
Personal loan funding | Personal Loans Held for Sale Maturing December 2026      
Line of Credit Facility [Line Items]      
Line Amount 175,000,000    
Committed Line Amount 175,000,000    
Outstanding Balance 0 13,000,000  
Personal loan funding | Personal Loans Held for Sale Maturing March 27 2028      
Line of Credit Facility [Line Items]      
Line Amount 300,000,000    
Committed Line Amount 100,000,000    
Outstanding Balance 103,000,000 185,000,000  
Personal loan funding | Personal Loans Held for Sale Maturing December 26 2028      
Line of Credit Facility [Line Items]      
Line Amount 300,000,000    
Committed Line Amount 300,000,000    
Outstanding Balance 163,000,000 26,000,000  
Total Secured Financing      
Line of Credit Facility [Line Items]      
Line Amount 38,180,000,000    
Committed Line Amount 7,685,000,000    
Outstanding Balance $ 16,639,000,000 $ 17,936,000,000  
Total Secured Financing | Maximum      
Line of Credit Facility [Line Items]      
Basis spread on variable rate (as percent) 3.25% 3.25%  
Total Secured Financing | Minimum      
Line of Credit Facility [Line Items]      
Basis spread on variable rate (as percent) 0.75% 0.80%  
Total Personal loan funding      
Line of Credit Facility [Line Items]      
Line Amount $ 1,125,000,000    
Committed Line Amount 850,000,000    
Outstanding Balance 347,000,000 $ 304,000,000  
MSR and advance facilities      
Line of Credit Facility [Line Items]      
Line Amount 9,105,000,000    
Committed Line Amount 4,755,000,000    
Outstanding Balance 2,307,000,000 $ 3,781,000,000  
MSR and advance facilities | Advance Facility Line Of Credit Maturing Jul 25 2027      
Line of Credit Facility [Line Items]      
Line Amount 2,000,000,000    
Early buy out financing | Master Repurchase Agreement Due Sept 16 2027      
Line of Credit Facility [Line Items]      
Line Amount 150,000,000    
Early buy out financing | Master Repurchase Agreement Due June 11 2027      
Line of Credit Facility [Line Items]      
Line Amount 3,000,000,000    
Early buy out financing | Master Repurchase Agreement Due Mar 26 2027      
Line of Credit Facility [Line Items]      
Line Amount $ 750,000,000