v3.25.2
Variable Interest Entities (VIEs) (Narrative) (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2025
Jun. 30, 2024
Variable Interest Entity [Line Items]      
Unfunded commitments to fund tax credit entities $ 234,000,000    
Amount of financial or other support not contractually required provided by the Corporation to VIEs   $ 0 $ 0
Low Income Housing Tax Credit Entities      
Variable Interest Entity [Line Items]      
Exposure to loss as a result of involvement with VIEs 570,000,000 570,000,000  
Other Tax Credit Entities      
Variable Interest Entity [Line Items]      
Exposure to loss as a result of involvement with VIEs $ 1,000,000 $ 1,000,000