Pension and Other Postretirement Plans

3 Months Ended

Mar. 31, 2013

Pension and Other Postretirement Plans

14. Pension and Other Postretirement Plans – The following tables set forth the net periodic pension and postretirement benefit expense for Northern Trust’s U.S. and non-U.S. pension plans, supplemental pension plan, and other postretirement plan for the three months ended March 31, 2013 and 2012.

Net Periodic Pension Expense U.S. Plan	Three Months Ended March 31,
(In Millions)	2013			2012
Service Cost	$	7.6		$	8.8
Interest Cost		10.5			10.4
Expected Return on Plan Assets		(23.1	)		(21.8	)
Amortization
Net Actuarial Loss		10.4			8.6
Prior Service Cost		(0.1	)		(0.1	)
Net Periodic Pension Expense	$	5.3		$	5.9

Net Periodic Pension Expense Non U.S. Plans	Three Months Ended March 31,
(In Millions)	2013			2012
Interest Cost	$	1.7		$	1.6
Expected Return on Plan Assets		(1.5	)		(1.6	)
Net Actuarial Loss Amortization		0.1			0.2
Net Periodic Pension Expense	$	0.3		$	0.2

Net Periodic Pension Expense Supplemental Plan	Three Months Ended March 31,
(In Millions)	2013		2012
Service Cost	$	0.4	$	0.7
Interest Cost		1.1		1.1
Amortization
Net Actuarial Loss		1.7		1.5
Prior Service Cost		0.1		0.1
Net Periodic Pension Expense	$	3.3	$	3.4

Net Periodic Postretirement Benefit Other Postretirement Plan	Three Months Ended March 31,
(In Millions)	2013			2012
Service Cost	$	—		$	0.1
Interest Cost		0.3			0.4
Amortization
Net Actuarial Gain		(0.3	)		(0.3	)
Prior Service Cost		(0.7	)		(1.3	)
Net Periodic Postretirement Benefit	$	(0.7	)	$	(1.1	)