Consolidated Statements Of Comprehensive Income (Loss) (USD $) In Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Consolidated Statements Of Comprehensive Income (Loss)
Net Income (Loss)	$ 94	$ (54)	$ 158	$ (18)
Gain (losses) from continuing operations on commodity derivatives designated as cash flow hedges:
Gains (losses) arising during period	3	12	2	(78)
Amount of losses reclassified into income	19	38	46	87
Net gains on commodity derivatives	22	50	48	9
Losses on treasury rate locks reclassified into income		2		3
Amortization of (gains) losses for prior service costs	(5)	4	(4)	4
Other comprehensive income from continuing operations, before income taxes	17	56	44	16
Income tax expense related to other comprehensive income from continuing operations	7	23	18	7
Other comprehensive income from continuing operations, net of income taxes	10	33	26	9
Other Comprehensive Income from Discontinued Operations, Net of Income Taxes		113		71
Comprehensive Income	$ 104	$ 92	$ 184	$ 62