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 postretirement health care plan for the three and six months ended June 30, 2015 and 2014.

Table 56: Net Periodic Pension Expense (Benefit)


Net Periodic Pension Expense U.S. Plan	Three Months Ended June 30,						Six Months Ended June 30,
(In Millions)	2015			2014			2015			2014
Service Cost	$	9.4		$	8.2		$	18.9		$	16.4
Interest Cost		11.2			11.1			22.4			22.2
Expected Return on Plan Assets		(24.1	)		(24.5	)		(48.2	)		(48.9	)
Amortization
Net Actuarial Loss		7.4			5.3			14.8			10.7
Prior Service Cost		(0.1	)		(0.1	)		(0.2	)		(0.2	)

Net Periodic Pension Expense	$	3.8		$	—		$	7.7		$	0.2


Net Periodic Pension Expense (Benefit) Non U.S. Plans	Three Months Ended June 30,						Six Months Ended June 30,
(In Millions)	2015			2014			2015			2014
Interest Cost	$	1.4		$	1.8		$	2.8		$	3.5
Expected Return on Plan Assets		(1.4	)		(1.8	)		(2.9	)		(3.5	)
Net Actuarial Loss Amortization		0.4			(0.4	)		0.8			(0.8	)

Net Periodic Pension Expense (Benefit)	$	0.4		$	(0.4	)	$	0.7		$	(0.8	)


Net Periodic Pension Expense Supplemental Plan	Three Months Ended June 30,				Six Months Ended June 30,
(In Millions)	2015		2014		2015		2014
Service Cost	$	0.9	$	0.7	$	1.8	$	1.5
Interest Cost		1.2		1.2		2.5		2.4
Amortization
Net Actuarial Loss		1.9		1.4		3.7		2.9
Prior Service Cost		0.1		0.1		0.1		0.2

Net Periodic Pension Expense	$	4.1	$	3.4	$	8.1	$	7.0


Net Periodic Postretirement Expense (Benefit) Postretirement Health Care Plan	Three Months Ended June 30,					Six Months Ended June 30,
(In Millions)	2015		2014			2015		2014
Service Cost	$	0.1	$	0.1		$	0.1	$	0.1
Interest Cost		0.4		0.3			0.7		0.7
Amortization
Net Actuarial (Gain)		—		(0.2	)		—		(0.3	)

Net Periodic Postretirement Expense (Benefit)	$	0.5	$	0.2		$	0.8	$	0.5