Employee Benefits (Tables)

9 Months Ended

Sep. 30, 2011

Pension Plan [Member]

Defined Benefit Plans Disclosures

	Successor						Predecessor
	Three  months ended September 30, 2011			Six months ended September  30, 2011			Three months ended March  31, 2011			Three  months ended September 30, 2010			Nine months ended September  30, 2010
	(Dollars in millions)
Service cost	$	14			27			14			13			40
Interest cost		106			214			104			112			336
Expected return on plan assets		(139	)		(278	)		(133	)		(139	)		(417	)
Amortization of unrecognized prior service cost		—			—			(6	)		(5	)		(16	)
Amortization of unrecognized net actuarial loss		—			—			31			33			98
Net periodic pension benefit (income) expense	$	(19	)		(37	)		10			14			41

Post-retirement Benefit Plans [Member]

Defined Benefit Plans Disclosures

	Successor						Predecessor
	Three months ended September 30, 2011			Six months ended September 30, 2011			Three months ended March 31, 2011			Three months ended September 30, 2010			Nine months ended September 30, 2010
	(Dollars in millions)
Service cost	$	2			3			2			1			5
Interest cost		42			83			41			46			137
Expected return on plan assets		(13	)		(25	)		(13	)		(15	)		(45	)
Amortization of unrecognized prior service costs		—			—			(24	)		(25	)		(75	)
Amortization of unrecognized net actuarial loss		—			—			10			10			30
Net periodic post-retirement (income) expense	$	31			61			16			17			52