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Line of Business Information
 3 Months Ended
Mar. 31, 2025
Segment Reporting [Abstract]  
Line of Business Information Line of Business Information
Our operations are organized into two lines of business, which represent our reportable segments: Investment Servicing and Investment Management, which are defined based on products and services provided. The results of operations for these lines of business are not necessarily comparable with those of other companies, including companies in the financial services industry. For information about our two lines of business, as well as revenues, expenses and capital allocation methodologies associated with them, refer to pages 171 to 173 in Note 24 to the consolidated financial statements included under Item 8, Financial Statements and Supplementary Data, in our 2024 Form 10-K.
Revenue and expenses are directly charged or allocated to our lines of business through management information systems. Our Chief Operating Decision Maker (CODM) is the chief executive officer. The line of business results are regularly provided to the CODM to evaluate the performance of each line of business and to inform how resources are allocated between those lines of business to best achieve management’s strategic and tactical goals. Capital is allocated based on the relative risks and capital requirements inherent in each business line, along with management judgment. Capital allocations may not be representative of the capital that might be required if these lines of business were separate business entities.
The following tables summarize our line of business results for the periods indicated. The "Other" columns represent amounts that are not allocated to our two lines of business, including expenses associated with the FDIC special assessment to recover estimated losses to the Deposit Insurance Fund arising from the protection of uninsured depositors following the closure of SVB and Signature Bank.
Three Months Ended March 31,
Investment
Servicing		Investment
Management		OtherTotal
(Dollars in millions)20252024202520242025202420252024
Revenue:
Servicing fees$1,275 $1,228 $— $— $— $— $1,275 $1,228 
Management fees— — 562 510 — — 562 510 
Foreign exchange trading services337 308 25 23 — — 362 331 
Securities finance108 90 6 6 — — 114 96 
Software and processing fees225 207 — — — — 225 207 
Other fee revenue
34 43 (2)7 — — 32 50 
Total fee revenue1,979 1,876 591 546 — — 2,570 2,422 
Net interest income709 711 5 5 — — 714 716 
Total revenue2,688 2,587 596 551 — — 3,284 3,138 
Provision for credit losses12 27 — — — — 12 27 
Expenses:
Compensation and employee benefits1,103 1,099 159 153 — — 1,262 1,252 
Information systems and communications477 417 20 15 — — 497 432 
Transaction processing services216 206 42 42 — — 258 248 
Other223 241 210 210 — 130 433 581 
Total expenses2,019 1,963 431 420 — 130 2,450 2,513 
Income before income tax expense$657 $597 $165 $131 $— $(130)$822 $598 
Pre-tax margin24 %23 %28 %24 %25 %19 %
Average assets (in billions)$333.9 $295.5 $3.4 $3.1 $337.3 $298.6