v3.26.1
Fair Value Disclosures - Fair Value Measurements of Assets and Liabilities Using Significant Unobservable Inputs (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Liabilities, Total        
Liabilities:        
Beginning Balance $ 198 $ 204 $ 155 $ 241
Included in Earnings (16) (30) 4 (67)
Included in Other Comprehensive Income 0 0 0 0
Purchases 0 0 0 0
Issues 64 0 84 3
Sales 0 0 0 0
Settlements, Net (8) (4) (5) (6)
Transfers into Level 3 0 0 0 17
Transfers out of Level 3 0 0 0 (18)
Ending Balance 238 170 238 170
Unrealized Gains (Losses) Still Held - Liabilities 7 (30) 18 (67)
Fair Value, Liability, Recurring Basis, Still Held, Unrealized Gain (Loss), OCI 0 0 0 0
Investments securities        
Assets:        
Beginning Balance 3,325 3,644 3,486 3,610
Included in Earnings (155) (43) (240) (60)
Included in Other Comprehensive Income (1) 7 (23) 12
Purchases 0 202 21 289
Issues 0 0 0 0
Sales 0 0 0 0
Settlements, net (55) (48) (130) (89)
Transfers into Level 3 0 0 0 0
Transfers out of Level 3 0 0 0 0
Ending Balance 3,114 3,762 3,114 3,762
Unrealized Gains (Losses) Still Held - Assets (67) 62 (87) 172
Unrealized Gains (Losses) Still Held, Assets, OCI (1) 6 (18) 10
Mortgage loans held-for-sale        
Assets:        
Beginning Balance 0 155 0 1,295
Included in Earnings (2) 0 (2) 3
Included in Other Comprehensive Income 0 0 0 0
Purchases 0 0 0 32
Issues 0 0 0 0
Sales 0 0 0 0
Settlements, net 0 0 0 0
Transfers into Level 3 4 0 4 0
Transfers out of Level 3 0 (155) 0 (1,330)
Ending Balance 2 0 2 0
Unrealized Gains (Losses) Still Held - Assets (2) 0 (2) 0
Unrealized Gains (Losses) Still Held, Assets, OCI 0 0 0 0
Mortgage loans held-for-investment        
Assets:        
Beginning Balance 716 737 1,418 841
Included in Earnings (64) (5) (70) 5
Included in Other Comprehensive Income 0 0 0 0
Purchases 0 0 0 0
Issues 0 0 0 0
Sales 0 0 0 0
Settlements, net (7) (14) (64) (69)
Transfers into Level 3 267 271 306 302
Transfers out of Level 3 (90) (5) (768) (95)
Ending Balance 822 984 822 984
Unrealized Gains (Losses) Still Held - Assets (64) (5) (75) 0
Unrealized Gains (Losses) Still Held, Assets, OCI 0 0 0 0
Other Assets        
Assets:        
Beginning Balance 4,793 5,391 5,029 5,439
Included in Earnings (61) 65 (87) 144
Included in Other Comprehensive Income 0 0 0 0
Purchases (3) (9) (15) (9)
Issues 34 156 53 309
Sales 0 (2) 0 (8)
Settlements, net (223) (260) (440) (534)
Transfers into Level 3 0 0 0 0
Transfers out of Level 3 0 0 0 0
Ending Balance 4,540 5,341 4,540 5,341
Unrealized Gains (Losses) Still Held - Assets (63) 65 (91) 144
Unrealized Gains (Losses) Still Held, Assets, OCI $ 0 $ 0 $ 0 $ 0