Employee Benefits (Tables)

6 Months Ended

Jun. 30, 2011

Pension plans

Employee benefits.

Schedule of components of net periodic (benefit) expense

Net periodic pension (benefit) expense for the three and six months ended June 30, 2011 and 2010 consisted of the following components:

	Three months ended June 30,						Six months ended June 30,
	2011			2010			2011			2010
	(Dollars in millions)
Service cost	$	20			17			28			33
Interest cost		169			58			229			122
Expected return on plan assets		(212	)		(71	)		(285	)		(142	)
Net amortization and deferral		3			3			7			10
Net periodic pension (benefit) expense	$	(20	)		7			(21	)		23

Postretirement benefit plans

Employee benefits.

Schedule of components of net periodic (benefit) expense

Net periodic postretirement benefit expense for the three and six months ended June 30, 2011 and 2010 consisted of the following components:

	Three months ended June 30,						Six months ended June 30,
	2011			2010			2011			2010
	(Dollars in millions)
Service cost	$	4			3			7			7
Interest cost		48			8			55			16
Expected return on plan assets		(13	)		(1	)		(14	)		(2	)
Amortization of unrecognized prior service cost		(1	)		—			(1	)		(1	)
Net periodic postretirement benefit expense	$	38			10			47			20