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Variable Interest Entities (VIEs) (Impact Of VIEs On The Consolidated Statements Of Comprehensive Income) (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Provision for income taxes:    
Total provision for income taxes $ 53 $ 29
Other noninterest income 9 23
Variable Interest Entity    
Provision for income taxes:    
Total provision for income taxes (4) (3)
Other noninterest income 0 1
Low income housing tax credits | Variable Interest Entity    
Provision for income taxes:    
Amortization of investments 22 19
Low income housing tax credits and other tax benefits related to tax credit entities (19) (17)
Other tax benefits related to tax credit entities | Variable Interest Entity    
Provision for income taxes:    
Low income housing tax credits and other tax benefits related to tax credit entities $ (7) $ (5)