Income Taxes (Tables)

12 Months Ended

Dec. 31, 2012

Income Taxes

Schedule of components of the income tax expense from continuing operations

	Successor					Predecessor
	Year Ended December 31, 2012			Nine Months Ended December 31, 2011		Three Months Ended March 31, 2011		Year Ended December 31, 2010
	(Dollars in millions)
Income tax expense:
Current tax provision:
Federal	$	638			173		104		470
State and local		105			26		11		80
Total current tax provision		743			199		115		550
Deferred tax expense (benefit):
Federal		(175	)		128		61		208
State and local		(26	)		22		15		33
Total deferred tax expense (benefit)		(201	)		150		76		241
Income tax expense	$	542			349		191		791

Schedule of effective income tax rate for continuing operations that differs from the statutory tax rate

	Successor				Predecessor
	Year Ended December 31, 2012		Nine Months Ended December 31, 2011		Three Months Ended March 31, 2011		Year Ended December 31, 2010
	(in percent)
Effective income tax rate:
Federal statutory income tax rate		35.0%		35.0%		35.0%		35.0%
State income taxes—net of federal effect		3.7		3.5		3.4		3.9
Medicare subsidiary		—		—		—		2.7
Excess compensation		—		—		—		1.0
Other		0.3		0.6		0.6		(0.4	)
Effective income tax rate		39.0%		39.1%		39.0%		42.2%

Schedule of components of the deferred tax assets and liabilities

	Successor
	December 31, 2012			December 31, 2011
	(Dollars in millions)
Deferred tax assets and liabilities:
Deferred tax liabilities:
Property, plant and equipment	$	(1,046	)		(1,279	)
Intangibles assets		(2,226	)		(2,274	)
Receivable from an affiliate due to pension plan participation		(398	)		(359	)
Other		(39	)		(148	)
Total deferred tax liabilities		(3,709	)		(4,060	)
Deferred tax assets:
Payable to affiliate due to post-retirement benefit plan participation		932			920
Debt premiums		70			164
Other		239			304
Total deferred tax assets		1,241			1,388
Valuation allowance on deferred tax assets		(12	)		(8	)
Net deferred tax assets		1,229			1,380
Net deferred tax liabilities	$	(2,480	)		(2,680	)