Components of Net Periodic Pension and Postretirement Benefit Costs

6 Months Ended

Jun. 30, 2012

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 are as follows:

($ in millions)		Three months ended June 30,						Six months ended June 30,
		2012			2011			2012			2011
Pension benefits
Service cost	$	38		$	38		$	76		$	76
Interest cost		75			80			149			161
Expected return on plan assets		(99	)		(92	)		(197	)		(184	)
Amortization of:
Prior service credit		(1	)		(1	)		(1	)		(1	)
Net actuarial loss		45			39			89			77
Settlement loss		9			8			19			17
Net periodic pension cost	$	67		$	72		$	135		$	146
Postretirement benefits
Service cost	$	3		$	3		$	6		$	6
Interest cost		9			9			18			18
Amortization of:
Prior service credit		(5	)		(5	)		(11	)		(11	)
Net actuarial gain		(5	)		(8	)		(10	)		(15	)
Net periodic postretirement benefit cost (credit)	$	2		$	(1	)	$	3		$	(2	)