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Recent Accounting Pronouncements
3 Months Ended
Mar. 31, 2026
Accounting Changes and Error Corrections [Abstract]  
Recent Accounting Pronouncements Recent Accounting Pronouncements
On January 1, 2026, Northern Trust early adopted ASU No. 2025-09, “Derivatives and Hedging (Topic 815): Hedge Accounting Improvements” (ASU 2025-09). ASU 2025-09 enhances hedge accounting guidance to better align accounting with an entity’s risk management activities by expanding eligibility and operability of hedge accounting across five targeted areas. Upon adoption, ASU 2025-09 did not impact Northern Trust’s consolidated balance sheets or consolidated statements of income. Please refer to Note 21 – Derivative Financial Instruments for further information.