Securities Purchased Under Agreements to Resell and Securities Sold Under Agreements to Repurchase (Tables)

12 Months Ended

Dec. 31, 2022

Investments, Debt and Equity Securities [Abstract]

Securities Purchased under Agreements to Resell

($ In Millions)	2022			2021
Balance at December 31	$	1,070.3		$	686.4
Average Balance During the Year	1,071.2			1,067.4
Average Interest Rate Earned During the Year	9.68		%	0.33		%
Maximum Month-End Balance During the Year	$	1,320.8		$	1,819.1

Note: Northern Trust nets securities sold under repurchase agreements against those purchased under resale agreements when FICC is the counterparty. The table above includes the impact of balance sheet netting under master netting arrangements. Refer to Note 27, “Offsetting of Assets and Liabilities.”

Securities Sold under Agreements to Repurchase

($ In Millions)	2022			2021
Balance at December 31	$	567.2		$	531.9
Average Balance During the Year	433.6			232.0
Average Interest Rate Paid During the Year	20.94		%	0.07		%
Maximum Month-End Balance During the Year	$	869.0		$	892.6

Note: Northern Trust nets securities sold under repurchase agreements against those purchased under resale agreements when FICC is the counterparty. The table above includes the impact of balance sheet netting under master netting arrangements. Refer to Note 27, “Offsetting of Assets and Liabilities.”

Transfer of Certain Financial Assets Accounted for as Secured Borrowings

	REMAINING CONTRACTUAL MATURITY OF THE AGREEMENTS
	December 31, 2022						December 31, 2021
($ In Millions)	OVERNIGHT AND CONTINUOUS		UP TO 30 DAYS		TOTAL		OVERNIGHT AND CONTINUOUS		UP TO 30 DAYS		TOTAL
U.S. Treasury and Agency Securities	$	567.2	$	—	$	567.2	$	32.4	$	499.5	$	531.9
Total Borrowings	567.2		—		567.2		32.4		499.5		531.9
Net Amount of Recognized Liabilities for Repurchase Agreements in Note 27	567.2		—		567.2		32.4		499.5		531.9