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Line of Business Information
 3 Months Ended
Mar. 31, 2023
Segment Reporting [Abstract]  
Line of Business Information Line of Business Information
Our operations are organized into two lines of business: 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 175 to 177 in Note 24 to the consolidated financial statements included under Item 8, Financial Statements and Supplementary Data, in our 2022 Form 10-K.
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 repositioning charges, employee costs, acquisition costs, revenue-related recoveries and certain legal accruals.
Three Months Ended March 31,
Investment
Servicing		Investment
Management		OtherTotal
(Dollars in millions)20232022202320222023202220232022
Servicing fees$1,217 $1,368 $— $— $— $— $1,217 $1,368 
Management fees— — 457 520 — — 457 520 
Foreign exchange trading services321 342 21 17 — — 342 359 
Securities finance103 93 6 3 — — 109 96 
Software and processing fees165 201 — — — — 165 201 
Other fee revenue28 46 17 (17)— — 45 29 
Total fee revenue1,834 2,050 501 523 — — 2,335 2,573 
Net interest income762 509 4 — — — 766 509 
Total other income— (1)— — — — — (1)
Total revenue2,596 2,558 505 523 — — 3,101 3,081 
Provision for credit losses44 — — — — — 44 — 
Total expenses1,978 1,925 386 389 5 13 2,369 2,327 
Income before income tax expense$574 $633 $119 $134 $(5)$(13)$688 $754 
Pre-tax margin22 %25 %24 %26 %22 %24 %