Consolidated Statements Of Operations (USD $) In Millions	3 Months Ended	6 Months Ended	3 Months Ended		9 Months Ended
	Sep. 30, 2011 Successor [Member]	Sep. 30, 2011 Successor [Member]	Mar. 31, 2011 Predecessor [Member]	Sep. 30, 2010 Predecessor [Member]	Sep. 30, 2010 Predecessor [Member]
OPERATING REVENUES
Operating revenues	$ 1,793	$ 3,609	$ 1,870	$ 1,923	$ 5,809
Operating revenues-affiliates	397	812	398	388	1,162
Total operating revenues	2,190	4,421	2,268	2,311	6,971
OPERATING EXPENSES
Cost of services and products (exclusive of depreciation and amortization)	624	1,215	626	665	1,946
Selling, general and administrative	458	1,032	501	509	1,554
Operating expenses-affiliates	76	149	52	51	143
Depreciation and amortization	620	1,243	451	470	1,402
Total operating expenses	1,778	3,639	1,630	1,695	5,045
OPERATING INCOME	412	782	638	616	1,926
OTHER INCOME (EXPENSE)
Interest expense	(95)	(183)	(150)	(150)	(465)
Other income		(1)	2	1	2
Total other income (expense)	(95)	(184)	(148)	(149)	(463)
INCOME BEFORE INCOME TAX EXPENSE	317	598	490	467	1,463
Income tax expense	118	234	191	181	621
NET INCOME	$ 199	$ 364	$ 299	$ 286	$ 842