v3.25.3
Investment Securities - Available-For-Sale Securities (Details) - USD ($)
$ in Millions
Sep. 30, 2025
Dec. 31, 2024
Debt Securities, Available-for-sale [Line Items]    
Amortized
Cost Basis $ 3,483 $ 3,815
Gross Unrealized Gains in Other Comprehensive Income 223 198
Gross Unrealized Losses in Other Comprehensive Income (65) (114)
Available-for-Sale, at fair value 3,641 3,899
Accrued Interest Receivable 10 10
Agency    
Debt Securities, Available-for-sale [Line Items]    
Amortized
Cost Basis 3,053 3,528
Gross Unrealized Gains in Other Comprehensive Income 13 4
Gross Unrealized Losses in Other Comprehensive Income (49) (100)
Available-for-Sale, at fair value 3,017 3,432
Accrued Interest Receivable 6 7
Other mortgage-related securities [Member]    
Debt Securities, Available-for-sale [Line Items]    
Amortized
Cost Basis 430 287
Gross Unrealized Gains in Other Comprehensive Income 210 194
Gross Unrealized Losses in Other Comprehensive Income (16) (14)
Available-for-Sale, at fair value 624 467
Accrued Interest Receivable $ 4 $ 3