Consolidated Statements of Cash Flows (USD $) In Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2011 Successor [Member]	Mar. 31, 2011 Predecessor [Member]	Jun. 30, 2010 Predecessor [Member]
OPERATING ACTIVITIES
Net (loss) income	$ (26)	$ 211	$ 196
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization	823	533	1,093
Deferred income taxes	(8)	145	303
Provision for uncollectible accounts	21	19	36
Loss on early retirement of debt	1		42
Changes in current assets and current liabilities:
Receivables	(15)	61	9
Accounts payable	(62)	(71)	20
Affiliates receivables or payable, net	39
Accrued income and other taxes	(61)	31	(37)
Other current assets and other current liabilities, net	30	(117)	(19)
Changes in other noncurrent assets and liabilities	21	(53)	(55)
Other, net	(63)	18	53
Net cash provided by operating activities	700	777	1,641
INVESTING ACTIVITIES
Payments for property, plant and equipment and capitalized software	(347)	(410)	(717)
Proceeds from sales or maturities of investment securities			159
Changes in short-term affiliate loans	(511)
Purchases of investment securities			(821)
Other, net	2	2
Net cash used in investing activities	(856)	(408)	(1,379)
FINANCING ACTIVITIES
Payments of long-term debt	(851)	(203)	(2,005)
Net proceeds from issuance of long-term debt	643		775
Dividends paid		(141)	(277)
Net proceeds from issuance of common stock		14	17
Early retirement of debt costs	(13)		(40)
Other, net		13	(20)
Net cash used in financing activities	(221)	(317)	(1,550)
Net (decrease) increase in cash and cash equivalents	(377)	52	(1,288)
Cash and cash equivalents at beginning of period	424	372	2,406
Cash and cash equivalents at end of period	47	424	1,118
Supplemental cash flow information:
Income taxes refunded (paid), net	11	1	(15)
Interest paid (net of capitalized interest of $4, $5 and $7)	$ (220)	$ (236)	$ (518)