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Goodwill and Intangible Assets Goodwill and Intangible Assets (Narrative) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Core deposit intangible      
Amortization expense of core deposit intangible $ 1 $ 1 $ 2