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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 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Provision for income taxes:        
Total provision for income taxes $ 83 $ 76 $ 168 $ 125
Variable Interest Entity        
Provision for income taxes:        
Total provision for income taxes (4) (4) (8) (7)
Low income housing tax credits | Variable Interest Entity        
Provision for income taxes:        
Amortization of LIHTC investments 17 18 34 35
Low income housing tax credits and other tax benefits related to tax credit entities (16) (17) (32) (33)
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 $ (5) $ (5) $ (10) $ (9)