Divestitures

3 Months Ended

Mar. 31, 2012

Discontinued Operations and Disposal Groups [Abstract]

Divestitures [Text Block]

DIVESTITURES

Edgewater Generating Unit 5:   On March 1, 2011, we sold our 25% interest in Edgewater Generating Unit 5 to Wisconsin Power and Light Company, a subsidiary of Alliant Energy Corp. (WPL) for our net book value, including working capital, of approximately $38 million. This transaction was treated as a sale of an asset.