Components of Net Periodic Pension and Postretirement Benefit Costs

3 Months Ended

Mar. 31, 2013

Components of Net Periodic Pension and Postretirement Benefit Costs

Components of Net Periodic Pension and Postretirement Benefit Costs

11.  Components of Net Periodic Pension and Postretirement Benefit Costs

The components of net periodic cost for the Company’s pension and postretirement benefit plans for the three months ended March 31are as follows:

($ in millions)		2013		2012
Pension benefits
Service cost	$	40	$	38
Interest cost		66		74
Expected return on plan assets		(97)		(98)
Amortization of:
Net actuarial loss		65		44
Settlement loss		10		10
Net periodic pension cost	$	84	$	68
Postretirement benefits
Service cost	$	4	$	3
Interest cost		8		9
Amortization of:
Prior service credit		(6)		(6)
Net actuarial gain		(3)		(5)
Net periodic postretirement cost	$	3	$	1