Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2014

Benefit Plans

Company's pension and postretirement benefit plans

($ in millions)		Three months ended June 30,				Six months ended June 30,
		2014		2013		2014		2013
Pension benefits
Service cost	$	24	$	39	$	48	$	79
Interest cost		64		66		128		132
Expected return on plan assets		(100)		(96)		(199)		(193)
Amortization of:
Prior service credit		(14)		(1)		(29)		(1)
Net actuarial loss		28		65		57		130
Settlement loss		11		9		22		19
Net periodic pension cost	$	13	$	82	$	27	$	166
Postretirement benefits
Service cost	$	2	$	3	$	5	$	7
Interest cost		5		9		11		17
Amortization of:
Prior service credit		(5)		(6)		(11)		(12)
Net actuarial gain		(5)		(3)		(11)		(6)
Net periodic postretirement (credit) cost	$	(3)	$	3	$	(6)	$	6