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Goodwill and Other Intangibles (Other Intangibles) (Details) - USD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Finite and Indefinite-Lived Intangible Assets [Line Items]    
Not subject to amortization $ 58 $ 61
Total 506 518
Mortgage servicing rights    
Finite and Indefinite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 884 882
Accumulated Amortization (600) (569)
Net Carrying Amount 284 313
Customer relationships    
Finite and Indefinite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 268 202
Accumulated Amortization (158) (146)
Net Carrying Amount 110 56
Software and other    
Finite and Indefinite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 189 199
Accumulated Amortization (135) (111)
Net Carrying Amount $ 54 $ 88