Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2012

Quarterly Financial Data (Unaudited)

Schedule of quarterly financial information

	Quarterly Financial Data
	Successor
2012	First Quarter		Second Quarter		Third Quarter		Fourth Quarter		Twelve Months Total
	(Dollars in millions)
Operating revenues	$	2,840		2,835		2,825		2,856		11,356
Operating income		290		291		322		375		1,278
Income tax expense (benefit)		48		27		54		67		196
Net income (loss)		77		37		83		111		308

	Quarterly Financial Data
	Predecessor		Successor
2011	First Quarter		Second Quarter			Third Quarter		Fourth Quarter			Nine Months Total
	(Dollars in millions)
Operating revenues	$	2,846		2,769			2,765		2,793			8,327
Operating income		579		138			223		182			543
Income tax expense (benefit)		146		—			33		(1	)		32
Net income (loss)		211		(13	)		32		—			19