CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended	3 Months Ended
	Jun. 30, 2011	Jun. 30, 2012	Mar. 31, 2011 Predecessor
OPERATING ACTIVITIES
Net income (loss)	$ (13)	$ 114	$ 211
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	802	1,479	533
Deferred income taxes		68	145
Provision for uncollectible accounts	21	53	19
Long-term debt (premium) discount amortization	(66)	(47)	6
Net loss on early retirement of debt	1	37
Changes in current assets and current liabilities:
Accounts receivable	(15)	(73)	61
Accounts payable	(62)	(76)	(71)
Accounts receivable and payable-affiliates, net	39	(307)
Accrued income and other taxes	(61)	(8)	31
Other current assets and other current liabilities, net	30	(27)	(117)
Changes in other noncurrent assets and liabilities	21	(139)	(53)
Other, net	3	4	12
Net cash provided by operating activities	700	1,078	777
INVESTING ACTIVITIES
Payments for property, plant and equipment and capitalized software	(347)	(752)	(410)
Changes in advances to affiliates	(511)	669
Proceeds from sale of property		133
Other, net	2		2
Net cash provided by (used in) investing activities	(856)	50	(408)
FINANCING ACTIVITIES
Net proceeds from issuance of long-term debt	643	897
Payments of long-term debt	(851)	(2,251)	(203)
Early retirement of debt costs	(13)	(177)
Dividends paid			(141)
Changes in notes payable-affiliates		583
Changes in accounts payable-affiliates		(187)
Other, net			27
Net cash used in financing activities	(221)	(1,135)	(317)
Net (decrease) increase in cash and cash equivalents	(377)	(7)	52
Cash and cash equivalents at beginning of period	424	48	372
Cash and cash equivalents at end of period	$ 47	$ 41	$ 424