Off-Balance-Sheet Financial Instruments, Guarantees and Other Commitments (Tables)

12 Months Ended

Dec. 31, 2019

Fair Value Disclosures [Abstract]

Commitments and Letters of Credit

The following table provides details of Northern Trust's off-balance sheet financial instruments as of December 31, 2019 and 2018.

TABLE 140: SUMMARY OF OFF-BALANCE SHEET FINANCIAL INSTRUMENTS

	DECEMBER 31,
(In Millions)	2019		2018
Legally Binding Commitments to Extend Credit(1)	$	24,406.2	$	25,023.0
Standby Letters of Credit and Financial Guarantees(2)(3)	2,416.7		2,486.2
Commercial Letters of Credit	32.3		32.3
Custody Securities Lent with Indemnification	138,085.9		128,904.8

(1) These amounts exclude $243.6 million and $242.3 million of commitments participated to others at December 31, 2019 and 2018, respectively.

(2) These amounts include $44.5 million and $72.3 million of standby letters of credit secured by cash deposits or participated to others as of December 31, 2019 and 2018, respectively.

(3) At December 31, 2019, $1.4 billion of the standby letters of credit will expire within one year or less and $845.9 million in one to five years.