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Acquisitions, Dispositions And Other Adjustments (Tables)
12 Months Ended
Dec. 31, 2011
Acquisitions, Dispositions And Other Adjustments  
Operating Results Of Discontinued Operation
 Aug. 27, Dec. 31,
 2010 2009
Operating revenues$349 $563
Operating expenses 327  523
Operating income 22  40
Income before income taxes 18  29
Income tax expense 8  9
Income from discontinued operations during phase-out period 10  20
Gain on disposal of discontinued operations 769   -
Income from discontinued operations, net of tax$779 $20