Commitment and Contingent Liabilities (Tables)

6 Months Ended

Jun. 30, 2021

Commitments and Contingencies Disclosure [Abstract]

Schedule of Fair Value, Off-balance Sheet Risks

The following table provides details of Northern Trust's off-balance sheet financial instruments as of June 30, 2021 and December 31, 2020.

TABLE 74: SUMMARY OF OFF-BALANCE SHEET FINANCIAL INSTRUMENTS

	JUNE 30, 2021						DECEMBER 31, 2020
($ In Millions)	ONE YEAR AND LESS		OVER ONE YEAR		TOTAL		ONE YEAR AND LESS		OVER ONE YEAR		TOTAL
Undrawn Commitments(1)	$	9,676.4	$	18,209.5	$	27,885.9	$	11,260.5	$	17,678.0	$	28,938.5
Standby Letters of Credit and Financial Guarantees(2)	1,284.9		402.9		1,687.8		1,228.1		763.5		1,991.6
Commercial Letters of Credit	62.1		—		62.1		54.6		—		54.6
Custody Securities Lent with Indemnification	175,509.6		—		175,509.6		157,478.0		—		157,478.0
Total Off-Balance Sheet Financial Instruments	$	186,533.0	$	18,612.4	$	205,145.4	$	170,021.2	$	18,441.5	$	188,462.7

(1) These amounts exclude $342.5 million and $384.7 million of commitments participated to others at June 30, 2021 and December 31, 2020, respectively.

(2) These amounts include $33.3 million and $24.2 million of standby letters of credit secured by cash deposits or participated to others as of June 30, 2021 and December 31, 2020, respectively.