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Significant Accounting Policies (Tables)
12 Months Ended
Dec. 31, 2024
Accounting Policies [Abstract]  
Summary of Real Estate Assets
A summary of our real estate assets is as follows (dollars in millions):
December 31,
20242023
Real estate under development, current (included in other current assets)$— $— 
Real estate and other assets held for sale (included in other current assets)40 42 
Real estate under development505 300 
Real estate held for investment (included in other assets, net)243 179 
Total real estate$788 $521 
Schedule of Loan Servicing Rights Recognized The amount of MSRs recognized during the years ended December 31, 2024, 2023 and 2022 was as follows (dollars in millions):
Year Ended December 31,
202420232022
Beginning balance, mortgage servicing rights$499 $561 $579 
Mortgage servicing rights recognized125 82 146 
Mortgage servicing rights sold— — — 
Amortization expense(138)(144)(164)
Ending balance, mortgage servicing rights$486 $499 $561 
Schedule of Assumptions Used in Measuring Fair Value of Servicing Assets The key assumptions used during the years ended December 31, 2024, 2023 and 2022 in measuring fair value were as follows:
Year Ended December 31,
202420232022
Weighted average discount rate
13.6 %13.0 %12.9 %
Weighted average conditional prepayment rate
11.8 %12.0 %10.1 %