v3.26.1
Mortgage Servicing Assets (Tables)
 3 Months Ended
Mar. 31, 2026
Servicing Asset [Abstract]  
Schedule of Changes in Carrying Amount of Mortgage Servicing Assets
Changes in the carrying amount of commercial mortgage servicing assets are summarized as follows:
 Three months ended March 31,
Dollars in millions20262025
Balance at beginning of period$577 $609 
Servicing retained from loan sales22 15 
Purchases4 4 
Amortization(31)(31)
Balance at end of period$572 $597 
Fair value at end of period$733 $805 
Changes in the carrying amount of residential mortgage servicing assets are summarized as follows:
Three months ended March 31,
Dollars in millions20262025
Balance at beginning of period$112 $111 
Servicing retained from loan sales5 3 
Amortization(3)(3)
Balance at end of period$114 $111 
Fair value at end of period$140 $138 
Schedule of Range and Weighted-Average of Significant Unobservable Inputs The sensitivity, range, and weighted average of the significant unobservable inputs used to determine the fair value of our commercial mortgage servicing assets at March 31, 2026, and December 31, 2025, along with the valuation techniques, are shown in the following table:
March 31, 2026December 31, 2025
Significant
Unobservable Input
Range
Weighted Average		RangeWeighted Average
Escrow earn rate3.92 %4.11 %4.10 %3.94 %4.09 %4.08 %
Effect on fair value from 10% adverse change$(29)$(29)
Effect on fair value from 20% adverse change(57)(57)
Residual cash flows discount rate6.97 %10.83 %10.58 %6.96 %10.84 %10.58 %
Effect on fair value from 10% adverse change$(19)$(19)
Effect on fair value from 20% adverse change(36)(36)
Expected defaults1.00 %1.50 %1.03 %1.00 %2.00 %1.01 %
Effect on fair value from 10% adverse change$(2)$(2)
Effect on fair value from 20% adverse change(3)(3)
Loan assumption rate8.00 %45.00 %9.83 %8.00 %45.00 %10.05 %
Effect on fair value from 10% adverse change$(6)$(6)
Effect on fair value from 20% adverse change(12)(13)
The sensitivity, range, and weighted-average of the significant unobservable inputs used to fair value our mortgage servicing assets at March 31, 2026, and December 31, 2025, along with the valuation techniques, are shown in the following table:
March 31, 2026December 31, 2025
Significant
Unobservable Input
RangeWeighted AverageRangeWeighted Average
Prepayment speed5.60 %32.73 %8.04 %6.01 %33.07 %8.33 %
Effect on Fair Value of a 10% adverse change$(4)$(4)
Effect on Fair Value of a 20% adverse change(8)(8)
Discount rate6.50 %8.75 %6.62 %6.50 %8.75 %6.62 %
Effect on Fair Value of a 10% adverse change$(4)$(4)
Effect on Fair Value of a 20% adverse change(7)(7)
Servicing cost$70.00 $4,332 $76.72 $70.00 $4,332 $76.47 
Schedule of Assumptions and Information for Originated Mortgage Servicing Right Additions
Assumptions and information for originated commercial mortgage servicing right additions for the year ended March 31, 2026 are shown in the following table:

Dollars in millions
March 31, 2026
Unpaid principal balance of loans sold during the period$1,685 
Pretax gains related to the sale of mortgage loans30 
Weighted average servicing fee rate0.17 %
Weighted average assumptions:
Escrow earn rate assumption4.26 %
Discount rate assumption10.34 %
Default rate assumption1.02 %
Prepayment rate assumption12.26 %