Benefit Plans (Tables)

6 Months Ended

Jun. 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 June 30,				Three Months Ended June 30,
		2012		2011		2012		2011
		(Dollars in millions)
Service cost		$	29	$	27	$	2	$	1
Interest cost			24		23		2		3
Estimated return on plan assets			(49)		(49)		―		―
Amortization and other			17		6		1		1
	Net periodic benefit cost	$	21	$	7	$	5	$	5

		Qualified Plan				Nonqualified Plans
		Six Months Ended June 30,				Six Months Ended June 30,
		2012			2011	2012		2011
		(Dollars in millions)
Service cost		$	58	$	53	$	4	$	3
Interest cost			49		46		5		5
Estimated return on plan assets			(98)		(98)		―		―
Amortization and other			34		13		2		2
	Net periodic benefit cost	$	43	$	14	$	11	$	10