v3.25.4
Derivative Financial Instruments And Hedging Activities (Narrative) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Derivative Instruments and Hedging Activities Disclosures [Line Items]        
Pre-tax AOCI loss $ (2,057) $ (3,912) $ (3,773) $ (4,481)
Accumulated Other Comprehensive Income related to discontinued cash flow hedges, before tax 9      
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months (66)      
Pre-tax net income related to amortization of discontinued cash flow hedges 2      
Maximum potential future exposure on swap participations 622      
Aggregate fair value of all derivative instruments with credit risk 54 47    
Posted collateral related to derivative instruments with credit risk 51 34    
Hedged Asset, Fair Value Hedge, Portfolio method, Amount 2,500 750    
Financial Asset, Closed Portfolio, Portfolio Layer Method, Amortized Cost 6,100 1,800    
Hedged Asset, Fair Value Hedge, Portfolio Layer Method, Hedged Layer, Fair Value, Cumulative Increase (Decrease) 3      
Debt Available-for-Sale Securities        
Derivative Instruments and Hedging Activities Disclosures [Line Items]        
Hedged Asset, Discontinued Fair Value Hedge, Cumulative Increase (Decrease) 31      
Unrealized gains (losses) on derivative instruments designated as cash flow hedges:        
Derivative Instruments and Hedging Activities Disclosures [Line Items]        
Pre-tax AOCI loss $ (91) $ (662) $ (399) $ (468)