v3.26.1
Debt Securities (Schedule Of Contractual Maturities Of Investment Securities) (Details) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Investments, Debt and Equity Securities [Abstract]    
Available-for-sale securities, due within one year, amortized cost $ 419  
Available-for-sale securities, after one year through five years, amortized cost 2,683  
Available-for-sale securities, after five years through ten years, amortized cost 1,626  
Available-for-sale securities, after ten years, amortized cost 6,534  
Available-for-sale securities, amortized cost 11,262 $ 11,376
Available-for-sale securities, due within one year, fair value 418  
Available-for-sale securities, after one year through five years, fair value 2,658  
Available-for-sale securities, after five years through ten years, fair value 1,595  
Available-for-sale securities, after ten years, fair value 6,244  
Debt Securities, Available-for-sale 10,915 11,112
Held-to-maturity securities, due within one year, amortized cost 0  
Held-to-maturity securities, after one year through five years, amortized cost 0  
Held-to-maturity securities, after five years through ten years, amortized cost 1  
Held-to-maturity securities, after ten years, amortized cost 17  
Investment securities held to maturity 18 18
Held-to-maturity securities, due within one year, fair value 0  
Held-to-maturity securities, after one year through five years, fair value 0  
Held-to-maturity securities, after five years through ten years, fair value 1  
Held-to-maturity securities, after ten years, fair value 17  
Held-to-maturity securities, fair value $ 18 $ 19