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Other Operating Expense (Tables)
 12 Months Ended
Dec. 31, 2025
Other Income and Expenses [Abstract]  
Schedule of Other Operating Expenses
The components of Other Operating Expense were as follows.
TABLE 86: OTHER OPERATING EXPENSE
FOR THE YEAR ENDED DECEMBER 31,
(In Millions)202520242023
Business Promotion$77.2 $81.3 $74.8 
Staff Related36.1 46.4 35.0 
FDIC Insurance Premiums(1)
17.8 43.0 112.0 
Charitable Contributions(2)
11.8 83.8 15.6 
Other Expenses202.4 200.7 235.5 
Total Other Operating Expense$345.3 $455.2 $472.9 
(1) FDIC Insurance Premiums includes a release of $15.9 million, and expenses of $14.7 million and $84.6 million related to the FDIC Special Assessment for the years ended December 31, 2025, 2024 and 2023, respectively.
(2) Charitable Contributions includes a $70.0 million charitable contribution to the Northern Trust Foundation for the year ended December 31, 2024.