v3.26.1
Derivative Financial Instruments - Additional Information (Details) - USD ($)
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Derivative      
Collateral held for derivative assets $ 1,600,000,000   $ 576,000,000
Amount of variation margin payment applied to derivative asset contracts 386,000,000   270,000,000
Valuation adjustments related to the credit risk associated with counterparties of customer accommodation derivative contracts 10,000,000   6,000,000
Amount of variation margin payment applied to derivative liability contracts 489,000,000   415,000,000
Gain or losses reclassified from AOCI into earnings associated with the discontinuance of cash flow hedges 0 $ 0  
Total collateral      
Derivative      
Collateral held for derivative liabilities $ 3,100,000,000   868,000,000
Interest rate contracts      
Derivative      
Maximum length of time of hedging exposure 70 months    
Deferred loss, net of tax, on cash flow hedges recorded in accumulated other comprehensive income $ 321,000,000   275,000,000
Net deferred loss, net of tax, recorded in AOCI are expected to be reclassified into earnings 79,000,000    
Interest rate contracts | Credit Risk      
Derivative      
Notional amount of the risk participations agreements 3,800,000,000   3,200,000,000
Fair value of risk participation agreements $ 9,000,000   $ 4,000,000