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Goodwill and Other Intangibles (Other Intangibles Narrative) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Finite and Indefinite-Lived Intangible Assets [Line Items]      
Amortization expense for other intangibles $ 89 $ 104 $ 110
Mortgage servicing rights      
Finite and Indefinite-Lived Intangible Assets [Line Items]      
Net Carrying Amount 284 313  
Mortgage servicing rights | Fair Value      
Finite and Indefinite-Lived Intangible Assets [Line Items]      
Net Carrying Amount $ 286 $ 316