Asset Impairments and Other Charges (Tables)

12 Months Ended

Dec. 31, 2012

Asset Impairments and Other Charges [Abstract]

Asset impairments and other charges for EME consisted of the following:



	Years Ended December 31,
(in millions)	2012		2011		2010
Midwest Generation plants impairment¹	$	—	$	640	$	40
Wind projects impairment and other charges	—		64		—
Ambit impairment	15		—		—
Other charges	13		10		4
EME asset impairments and other charges²	$	28	$	714	$	44


¹	EME and Midwest Generation each recorded impairment charges on the Midwest Generation plants in 2011 and 2010. For an explanation of these charges, see the discussion below under Midwest Generation.


²	The fair value of long-lived assets as determined using the discounted cash flow models discussed below qualify as Level 3 in the fair value hierarchy.

Asset impairments and other charges for Midwest Generation consisted of the following:



	Years Ended December 31,
(in millions)	2012		2011		2010
Midwest Generation plants impairment	$	—	$	640	$	40
Other charges	14		13		8
Midwest Generation asset impairments and other charges¹	$	14	$	653	$	48


¹	The fair value of long-lived assets as determined using the discounted cash flow models discussed below qualify as Level 3 in the fair value hierarchy.

- Definition

Tabular disclosure for impairment of long-lived assets held and used by an entity which includes a description of the impaired long-lived asset and facts and circumstances leading to the impairment, aggregate amount of the impairment loss and where the loss is located in the income statement, method(s) for determining fair value, and the segment in which the impaired long-lived asset is reported.

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