Other Operating Expense (Tables)

12 Months Ended

Dec. 31, 2024

Other Income and Expenses [Abstract]

Summary of other operating expenses

The components of Other Operating Expense were as follows.

TABLE 88: OTHER OPERATING EXPENSE

	FOR THE YEAR ENDED DECEMBER 31,
(In Millions)	2024		2023		2022
Business Promotion	$	81.3	$	74.8	$	76.7
Staff Related	46.4		35.0		34.6
FDIC Insurance Premiums(1)	43.0		112.0		17.8
Charitable Contributions(2)	83.8		15.6		19.4
Other Expenses	200.7		235.5		210.8
Total Other Operating Expense	$	455.2	$	472.9	$	359.3

(1) FDIC Insurance Premiums for the years ended December 31, 2024 and December 31, 2023 includes amounts related to the FDIC Insurance Premium Special Assessment. Refer to Note 24—Commitments and Contingent Liabilities for further information.

(2) Charitable Contributions includes a $70.0 million charitable contribution to the Northern Trust Foundation for the year ended December 31, 2024.