Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Cash flows from operating activities
Net income	$ 60	$ 45
Adjustments to reconcile net income to net cash from operating activities
Depreciation and amortization	52	48
Deferred income tax expense	28	24
Earnings from unconsolidated affiliate, adjusted for cash distributions	0	(3)
Other non-cash income items	(1)	(6)
Asset and liability changes	(92)	(35)
Net cash provided by operating activities	47	73
Cash flows from investing activities
Capital expenditures	(42)	(96)
Net change in note receivable from affiliate	(4)	23
Other	(1)	0
Net cash used in investing activities	(47)	(73)
Net change in cash and cash equivalents	0	0
Cash and cash equivalents
Beginning of period	0	0
End of period	$ 0	$ 0