v3.25.1
Investments Narrative (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Dec. 31, 2024
Dec. 31, 2023
Investments [Line Items]        
Available-for-sale Securities, Premiums $ 48   $ 51  
Available for sale Securities Discounts (168)   (175)  
Provision for/(reversal of) credit losses 1 $ (4)    
Debt securities, available-for-sale, amortized cost, allowance for credit loss, excluding accrued interest 30 26 30 $ 31
Amortized Cost Of Held to maturity Securities Transferred To Available For Sale Securities 0      
Total net accretion or amortization recognized in interest income associated with PLRMBS with previous credit losses to the prior methodology 3      
Interest-bearing deposits        
Investments [Line Items]        
Allowance for Credit Loss 0   0  
Accrued Interest, after Allowance for Credit Loss 14   15  
Fed Funds Sold        
Investments [Line Items]        
Allowance for Credit Loss 0   0  
Accrued Interest, after Allowance for Credit Loss 1      
Securities borrowed or purchased under agreements to resell        
Investments [Line Items]        
Allowance for Credit Loss 0   0  
Accrued Interest, after Allowance for Credit Loss 1   1  
Mortgage Backed Securities        
Investments [Line Items]        
Held-to-maturity Securities, Premiums 2   2  
Held-to-maturity Securities, Discounts (2)   (2)  
Debt securities, available-for-sale, amortized cost, allowance for credit loss, excluding accrued interest 30   30  
Available-for-sale Securities | Mortgage Backed Securities        
Investments [Line Items]        
Allowance for credit losses on AFS 289   293  
Available-for-sale Securities | Other Than Mortgage Backed Securities        
Investments [Line Items]        
Debt securities, available-for-sale, amortized cost, allowance for credit loss, excluding accrued interest 0   $ 0  
Held-to-maturity Securities | Other Than Mortgage Backed Securities        
Investments [Line Items]        
Allowance for credit loss $ 0 $ 0