v3.26.1
Investment Securities - Available-For-Sale Securities (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Debt Securities, Available-for-sale [Line Items]    
Amortized
Cost Basis $ 2,263 $ 3,149
Gross Unrealized Gains in Other Comprehensive Income 198 225
Gross Unrealized Losses in Other Comprehensive Income (57) (58)
Available-for-Sale, at fair value 2,404 3,316
Accrued Interest Receivable 10 13
Agency    
Debt Securities, Available-for-sale [Line Items]    
Amortized
Cost Basis 1,871 2,726
Gross Unrealized Gains in Other Comprehensive Income 9 16
Gross Unrealized Losses in Other Comprehensive Income (36) (40)
Available-for-Sale, at fair value 1,844 2,702
Accrued Interest Receivable 4 6
Other mortgage-related securities [Member]    
Debt Securities, Available-for-sale [Line Items]    
Amortized
Cost Basis 392 423
Gross Unrealized Gains in Other Comprehensive Income 189 209
Gross Unrealized Losses in Other Comprehensive Income (21) (18)
Available-for-Sale, at fair value 560 614
Accrued Interest Receivable $ 6 $ 7