EMPLOYEE BENEFIT PLANS

Net periodic benefit costs are charged to "employee benefits expense" on the consolidated statements of comprehensive income. The components of net periodic benefit cost for the Corporation's qualified pension plan, non-qualified pension plan and postretirement benefit plan are as follows.



Qualified Defined Benefit Pension Plan	Three Months Ended September 30,						Nine Months Ended September 30,
(in millions)	2013			2012			2013			2012
Service cost	$	9		$	9		$	28		$	25
Interest cost	20			19			59			59
Expected return on plan assets	(33		)	(29		)	(99		)	(85		)
Amortization of prior service cost	1			1			3			3
Amortization of net loss	18			14			56			40
Net periodic defined benefit cost	$	15		$	14		$	47		$	42



Non-Qualified Defined Benefit Pension Plan	Three Months Ended September 30,				Nine Months Ended September 30,
(in millions)	2013		2012		2013			2012
Service cost	$	1	$	1	$	3		$	3
Interest cost	2		2		7			7
Amortization of prior service cost	—		—		(1		)	(1		)
Amortization of net loss	3		1		8			5
Net periodic defined benefit cost	$	6	$	4	$	17		$	14



Postretirement Benefit Plan	Three Months Ended September 30,						Nine Months Ended September 30,
(in millions)	2013			2012			2013			2012
Interest cost	$	1		$	1		$	3		$	3
Expected return on plan assets	(1		)	(1		)	(3		)	(3		)
Amortization of transition obligation	—			1			—			3
Amortization of net loss	—			—			1			1
Net periodic postretirement benefit cost	$	—		$	1		$	1		$	4

For further information on the Corporation's employee benefit plans, refer to Note 17 to the consolidated financial statements in the Corporation's 2012 Annual Report.