Reporting Segments

9 Months Ended

Sep. 30, 2016

Segment Reporting [Abstract]

Reporting Segments

Reporting Segments— The following table shows the earnings contributions of Northern Trust’s reporting segments for the three- and nine- month periods ended September 30, 2016 and 2015.

Table 51: Results of Reporting Segments

Three Months Ended September 30,	Corporate & Institutional Services						Wealth Management						Treasury and Other						Total Consolidated
($ In Millions)	2016			2015			2016			2015			2016			2015			2016			2015
Noninterest Income
Trust, Investment and Other Servicing Fees	$	450.8		$	429.7		$	337.5		$	319.4		$	—		$	—		$	788.3		$	749.1
Foreign Exchange Trading Income	55.2			60.0			0.9			2.9			(2.5		)	—			53.6			62.9
Other Noninterest Income	41.5			45.9			26.3			28.3			0.9			0.4			68.7			74.6
Net Interest Income*	138.2			108.6			164.1			142.5			7.8			23.9			310.1			275.0
Revenue*	685.7			644.2			528.8			493.1			6.2			24.3			1,220.7			1,161.6
Provision for Credit Losses	4.0			(2.8		)	(7.0		)	(7.2		)	—			—			(3.0		)	(10.0		)
Noninterest Expense	487.8			464.6			318.0			316.3			37.2			31.4			843.0			812.3
Income before Income Taxes*	193.9			182.4			217.8			184.0			(31.0		)	(7.1		)	380.7			359.3
Provision for Income Taxes*	61.8			58.3			82.3			69.0			(21.0		)	(2.6		)	123.1			124.7
Net Income	$	132.1		$	124.1		$	135.5		$	115.0		$	(10.0	)	$	(4.5	)	$	257.6		$	234.6
Percentage of Consolidated Net Income	51		%	53		%	53		%	49		%	(4		)%	(2		)%	100		%	100		%
Average Assets	$	75,696.5		$	74,222.5		$	26,601.7		$	25,201.2		$	14,084.3		$	10,500.4		$	116,382.5		$	109,924.1

* Non-GAAP financial measures stated on a fully taxable equivalent basis (FTE). Total consolidated includes FTE adjustments of $7.0 million for 2016 and $6.1 millionfor 2015.

Nine Months Ended September 30,	Corporate & Institutional Services						Wealth Management						Treasury and Other						Total Consolidated
($ In Millions)	2016			2015			2016			2015			2016			2015			2016			2015
Noninterest Income
Trust, Investment and Other Servicing Fees	$	1,331.1		$	1,269.0		$	982.6		$	964.4		$	—		$	—		$	2,313.7		$	2,233.4
Foreign Exchange Trading Income	169.1			199.3			7.0			10.0			2.4			—			178.5			209.3
Other Noninterest Income	113.0			131.0			79.8			83.9			124.8			107.6			317.6			322.5
Net Interest Income*	417.8			297.3			482.8			421.8			30.1			80.3			930.7			799.4
Revenue*	2,031.0			1,896.6			1,552.2			1,480.1			157.3			187.9			3,740.5			3,564.6
Provision for Credit Losses	—			(3.0		)	(4.0		)	(21.5		)	—			—			(4.0		)	(24.5		)
Noninterest Expense	1,519.9			1,387.7			975.2			960.9			101.7			107.2			2,596.8			2,455.8
Income before Income Taxes*	511.1			511.9			581.0			540.7			55.6			80.7			1,147.7			1,133.3
Provision for Income Taxes*	158.0			160.9			219.1			203.2			4.6			34.7			381.7			398.8
Net Income	$	353.1		$	351.0		$	361.9		$	337.5		$	51.0		$	46.0		$	766.0		$	734.5
Percentage of Consolidated Net Income	46		%	48		%	47		%	46		%	7		%	6		%	100		%	100		%
Average Assets	$	75,589.0		$	73,089.3		$	26,525.6		$	24,732.4		$	12,795.3		11,896.6			$	114,909.9		$	109,718.3

* Non-GAAP financial measures stated on a fully taxable equivalent basis (FTE). Total consolidated includes FTE adjustments of $20.1 million for 2016 and $18.7 millionfor 2015.

In the three- and nine-month periods ended September 30, 2015, the presentation of average assets was changed to reflect a modification to the methodology by which assets are allocated among our reporting segments. The change in presentation resulted in an increase in average assets and a reduction in net interest margin for C&IS and a reduction in average assets and an increase in net interest margin for Treasury and Other.

Further discussion of reporting segment results is provided within the “Reporting Segments” section of Management’s Discussion and Analysis of Financial Condition and Results of Operations.