Gain (loss) after tax expense or benefit, not previously recognized and resulting from the sale of a business component, which is recognized at the date of sale. A gain (loss) reflects the amount by which the consideration received exceeds (is exceeded by) the net carrying amount (reflecting previous provisions for loss on disposal, if any) of the disposal group.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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- Definition

The cash inflow from sale of buildings.

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- Definition

The cash inflow associated with the sale of equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

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Discontinued Operations And Dispositions (Narrative) (Details) (USD $) In Millions, unless otherwise specified	1 Months Ended						12 Months Ended
	Jul. 31, 2011 Power [Member] mW	Mar. 31, 2011 Power [Member] mW	May 31, 2009 Other [Member]	Sep. 30, 2010 GWF [Member]	Jun. 30, 2009 GWF [Member]	May 31, 2009 GWF [Member]	Dec. 31, 2010 Enterprise Group Development Corporation [Member]	Dec. 31, 2011 Energy Holdings [Member]
Sale of gas fired generation facilities	1,000	1,000
Aggregate amount for plant sale	$ 335	$ 352
Gain on disposal of discontinued operations	25	54	2				4
Proceeds from sale of building								215
Ownership interest			6.50%
Proceeds, net of sales costs								175
Equity method investment, sale price						70
Separate sale prices							46
Sale of ownership equity				$ 63	$ 7