Concentrations of Credit Risk (Tables)

12 Months Ended

Dec. 31, 2025

Risks and Uncertainties [Abstract]

Schedule of Geographic Concentrations

The table below provides additional detail regarding residential real estate loans by geographic region.

TABLE 65: RESIDENTIAL REAL ESTATE LOANS BY GEOGRAPHIC REGION

	DECEMBER 31,
(In Millions)	2025		2024
Residential Real Estate by geographic region:
Florida	$	1,597.9	$	1,636.5
California	1,291.7		1,371.9
Illinois	548.5		591.3
New York	539.3		510.8
Colorado	337.7		309.9
Texas	301.4		308.7
All other(1)	1,460.8		1,380.8
Total Residential Real Estate	$	6,077.3	$	6,109.9

(1) The remainder is distributed throughout the other geographic regions within the U.S. served by Northern Trust.

Schedule of Commercial Real Estate Loan Types

The table below provides additional detail regarding commercial real estate loan types.

TABLE 66: COMMERCIAL REAL ESTATE LOANS

	DECEMBER 31,
(In Millions)	2025		2024
Commercial Mortgages
Apartment/ Multi-family	$	1,586.4	$	1,599.9
Industrial/Warehouse	960.1		906.1
Office	948.0		944.4
Retail	695.9		665.6
Other	622.5		630.3
Total Commercial Mortgages	4,812.9		4,746.3
Construction, Acquisition and Development Loans	459.3		567.9
Total Commercial Real Estate Loans	$	5,272.2	$	5,314.2