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 nine months ended September 30, 2012 and 2011.


Net Periodic Pension Expense U.S. Plan	Three Months Ended September 30,						Nine Months Ended September 30,
(In Millions)	2012			2011			2012			2011
Service Cost	$	8.9		$	10.7		$	26.5		$	32.1
Interest Cost		10.3			10.2			31.1			30.6
Expected Return on Plan Assets		(21.7	)		(19.7	)		(65.3	)		(59.1	)
Amortization
Net Actuarial Loss		8.6			6.5			25.8			19.5
Prior Service Cost		(0.1	)		0.4			(0.3	)		1.2

Net Periodic Pension Expense	$	6.0		$	8.1		$	17.8		$	24.3


Net Periodic Pension Expense	Three Months Ended						Nine Months Ended
Non U.S. Plans	September 30,						September 30,
(In Millions)	2012			2011			2012			2011
Interest Cost	$	1.6		$	1.6		$	4.7		$	4.9
Expected Return on Plan Assets		(1.7	)		(2.1	)		(4.9	)		(6.2	)
Net Actuarial Loss Amortization		0.2			0.1			0.6			0.1

Net Periodic Pension Expense (Benefit)	$	0.1		$	(0.4	)	$	0.4		$	(1.2	)


Net Periodic Pension Expense	Three Months Ended						Nine Months Ended
Supplemental Plan	September 30,						September 30,
(In Millions)	2012			2011			2012			2011
Service Cost	$	0.8		$	0.8		$	2.2		$	2.4
Interest Cost		1.2			1.1			3.4			3.3
Amortization
Net Actuarial Loss		1.5			1.4			4.5			4.2
Prior Service Cost		0.2			0.1			0.4			0.3

Net Periodic Pension Expense	$	3.7		$	3.4		$	10.5		$	10.2


Net Periodic Benefit Expense	Three Months Ended						Nine Months Ended
Other Postretirement Plan	September 30,						September 30,
(In Millions)	2012			2011			2012			2011
Service Cost	$	0.1		$	0.1		$	0.2		$	0.3
Interest Cost		0.3			0.7			1.0			2.1
Amortization
Net Actuarial (Gain) Loss		(0.7	)		0.4			(1.6	)		1.2
Prior Service Cost		(1.2	)		(1.3	)		(3.8	)		(3.9	)

Net Periodic Benefit	$	(1.5	)	$	(0.1	)	$	(4.2	)	$	(0.3	)