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Mortgage Banking Activity (Tables)
 3 Months Ended
Mar. 31, 2025
Mortgage Banking [Abstract]  
Schedule of Residential Mortgage Loans Held for Sale
The following table summarizes activity related to residential mortgage loans held for sale as of and for the three months ended March 31, 2025 and the year ended December 31, 2024.
MORTGAGE LOAN ACTIVITY
(Dollars in millions)March 31, 2025December 31, 2024
Balance at beginning of period$81 $62 
Originations and purchases234 951 
Sales, net of gains(207)(932)
Balance at end of period$108 $81 
Schedule of Mortgage Servicing Rights The following table presents the carrying values of mortgage servicing rights as of March 31, 2025 and December 31, 2024.
MORTGAGE SERVICING RIGHTS
March 31, 2025December 31, 2024
(Dollars in millions)Gross Carrying AmountAccumulated AmortizationNet Carrying AmountGross Carrying AmountAccumulated AmortizationNet Carrying Amount
Mortgage servicing rights$32 $(10)$22 $30 $(9)$21