Employee Benefits (Tables)

6 Months Ended

Jun. 30, 2012

Pension Plan

Employee Benefits

Schedule of components of net periodic pension (income) and post-retirement benefit expense

	Pension Plan
	Successor									Predecessor
	Three Months Ended June 30, 2012			Six Months Ended June 30, 2012			Three Months Ended June 30, 2011			Three Months Ended March 31, 2011
	(Dollars in millions)
Service cost	$	15			29			13			14
Interest cost		97			196			108			104
Expected return on plan assets		(144	)		(288	)		(139	)		(133	)
Recognition of prior service cost		—			—			—			(6	)
Recognition of net actuarial loss		—			—			—			31
Net periodic pension (income) expense	$	(32	)		(63	)		(18	)		10

Post-Retirement Benefit Plan

Employee Benefits

Schedule of components of net periodic pension (income) and post-retirement benefit expense

	Post-Retirement Benefit Plan
	Successor									Predecessor
	Three Months Ended June 30, 2012			Six Months Ended June 30, 2012			Three Months Ended June 30, 2011			Three Months Ended March 31, 2011
	(Dollars in millions)
Service cost	$	2			4			1			2
Interest cost		37			73			41			41
Expected return on plan assets		(10	)		(21	)		(12	)		(13	)
Recognition of prior service cost		—			—			—			(24	)
Recognition of net actuarial loss		—			—			—			10
Net periodic post-retirement benefit expense	$	29			56			30			16