Commitments and Contingent Liabilities (Tables)

12 Months Ended

Dec. 31, 2022

Commitments and Contingencies Disclosure [Abstract]

Schedule of Summary of Off-Balance Sheet Financial Instruments

The following table provides details of Northern Trust's off-balance sheet financial instruments as of December 31, 2022 and 2021.

TABLE 122: SUMMARY OF OFF-BALANCE SHEET FINANCIAL INSTRUMENTS

	DECEMBER 31,
	2022						2021
($ In Millions)	ONE YEAR AND LESS		OVER ONE YEAR		TOTAL		ONE YEAR AND LESS		OVER ONE YEAR		TOTAL
Undrawn Commitments(1)	$	13,639.2	$	17,321.4	$	30,960.6	$	9,567.0	$	17,855.2	$	27,422.2
Standby Letters of Credit and Financial Guarantees(2)(3)	17,553.0		409.9		17,962.9		3,485.6		553.9		4,039.5
Commercial Letters of Credit	25.4		1.3		26.7		68.5		1.1		69.6
Securities Lent with Indemnification	130,311.0		—		130,311.0		170,445.3		—		170,445.3
Unsettled Reverse Repurchase Agreements	496.8		—		496.8		—		—		—
Total Off-Balance Sheet Financial Instruments	$	162,025.4	$	17,732.6	$	179,758.0	$	183,566.4	$	18,410.2	$	201,976.6

(1) These amounts exclude $266.6 million and $366.6 million of commitments participated to others at December 31, 2022 and 2021, respectively.

(2) These amounts include $35.1 million and $30.5 million of standby letters of credit secured by cash deposits or participated to others as of December 31, 2022 and 2021, respectively.

(3) This amount includes a $16.3 billion guarantee to the Fixed Income Clearing Corporation (FICC) under the sponsored member program, without taking into consideration the related collateral, as of December 31, 2022. As of December 31, 2021, there was a $2.3 billion guarantee to the FICC; Northern Trust became a sponsored member during the third quarter of 2021.