Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2012

Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]

Summary of the components of net periodic benefit cost recognized for pension plans

		Qualified Plan				Nonqualified Plans
		Three Months Ended September 30,				Three Months Ended September 30,
		2012		2011		2012		2011
		(Dollars in millions)
Service cost		$	28	$	23	$	2	$	2
Interest cost			25		23		2		2
Estimated return on plan assets			(51)		(49)		―		―
Amortization and other			18		9		2		1
	Net periodic benefit cost	$	20	$	6	$	6	$	5

		Qualified Plan				Nonqualified Plans
		Nine Months Ended September 30,				Nine Months Ended September 30,
		2012			2011	2012		2011
		(Dollars in millions)
Service cost		$	86	$	76	$	6	$	5
Interest cost			74		69		7		7
Estimated return on plan assets			(149)		(147)		―		―
Amortization and other			52		22		4		3
	Net periodic benefit cost	$	63	$	20	$	17	$	15