CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011 Predecessor
OPERATING ACTIVITIES
Net income	$ 77	$ 211
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	741	533
Deferred income taxes	47	145
Provision for uncollectible accounts	25	19
Long-term debt (premium) discount amortization	(28)	6
Changes in current assets and current liabilities:
Accounts receivable	(9)	61
Accounts payable	(123)	(71)
Accounts receivable and payable-affiliates, net	(307)
Accrued income and other taxes	41	31
Other current assets and other current liabilities, net	70	(117)
Changes in other noncurrent assets and liabilities	(47)	(53)
Other, net	(10)	12
Net cash provided by operating activities	477	777
INVESTING ACTIVITIES
Payments for property, plant and equipment and capitalized software	(426)	(410)
Changes in advances to affiliates	742
Other, net		2
Net cash provided by (used in) investing activities	316	(408)
FINANCING ACTIVITIES
Payments of long-term debt	(840)	(203)
Dividends paid		(141)
Changes in advances from affiliates	48
Other, net		27
Net cash used in financing activities	(792)	(317)
Net increase in cash and cash equivalents	1	52
Cash and cash equivalents at beginning of period	48	372
Cash and cash equivalents at end of period	$ 49	$ 424