Pension and Other Postretirement Plans

6 Months Ended

Jun. 30, 2011

Pension and Other Postretirement Plans

15. 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 and six months ended June 30, 2011 and 2010.

Net Periodic Pension Expense U.S. Plan	Three Months Ended June 30						Six Months Ended June 30
(In Millions)	2011			2010			2011			2010
Service Cost	$	10.7		$	9.5		$	21.4		$	19.0
Interest Cost		10.2			9.2			20.4			18.4
Expected Return on Plan Assets		(19.7	)		(18.3	)		(39.4	)		(36.6	)
Amortization
Net Loss		6.5			5.0			13.0			10.0
Prior Service Cost		.4			.4			.8			.8
Net Periodic Pension Expense	$	8.1		$	5.8		$	16.2		$	11.6
Net Periodic Pension Expense Non U.S. Plans	Three Months Ended June 30						Six Months Ended June 30
(In Millions)	2011			2010			2011			2010
Service Cost	$	—		$	.6		$	—		$	1.6
Interest Cost		1.6			1.5			3.2			3.3
Expected Return on Plan Assets		(2.1	)		(1.8	)		(4.1	)		(3.9	)
Net Loss Amortization		—			—			.1			.4
Gain on Curtailment of Non-U.S. Plan		—			(2.2	)		—			(2.2	)
Net Periodic Pension Benefit	$	(.5	)	$	(1.9	)	$	(.8	)	$	(.8	)
Net Periodic Pension Expense Supplemental Plan	Three Months Ended June 30						Six Months Ended June 30
(In Millions)	2011			2010			2011			2010
Service Cost	$	0.8		$	.8		$	1.6		$	1.6
Interest Cost		1.1			1.2			2.2			2.4
Amortization
Net Loss		1.4			1.5			2.8			3.0
Prior Service Cost		.1			—			.2			—
Net Periodic Pension Expense	$	3.4		$	3.5		$	6.8		$	7.0
Net Periodic Benefit Expense Other Postretirement Plan	Three Months Ended June 30						Six Months Ended June 30
(In Millions)	2011			2010			2011			2010
Service Cost	$	.1		$	.2		$	.2		$	.4
Interest Cost		0.7			.7			1.4			1.4
Amortization
Net Loss		.4			.5			.8			1.0
Prior Service Cost		(1.3	)		(1.3	)		(2.6	)		(2.6	)
Net Periodic Benefit Expense (Benefit)	$	(.1	)	$	.1		$	(.2	)	$	.2