Acquisitions, Divestitures and Discontinued Operations (Tables)

12 Months Ended

Dec. 31, 2012

Dec. 31, 2010

Acquisitions, Divestitures and Discontinued Operations [Abstract]

Business Acquisition, Pro Forma Information

The following table summarizes the pro forma operating revenues and net income (loss) attributable to Calpine for 2010 as if the Conectiv Acquisition had occurred on January 1, 2009. The pro forma information has been prepared by adding the preliminary, unaudited historical results of Conectiv, as adjusted for depreciation expense (utilizing the preliminary values assigned to the net assets acquired from Conectiv), interest expense from NDH Project Debt and income taxes to our historical results for the periods indicated below (in millions, except per share amounts).

	2010
Operating revenues	$	7,931
Net loss attributable to Calpine	$	(83	)
Basic loss per common share attributable to Calpine	$	(0.17	)
Diluted loss per common share attributable to Calpine	$	(0.17	)

Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures

The table below presents the components of our discontinued operations for the period presented (in millions):

	2010
Operating revenues	$	92
Gain on disposal of discontinued operations	209
Income from discontinued operations before taxes	43
Less: Income tax expense	59
Discontinued operations, net of tax	$	193

Losses Due To Acquisition

We recorded a total pre-tax loss of approximately $125 million on our Consolidated Statement of Operations for the year ended December 31, 2010, for this transaction, which was recorded as shown below (in millions):

Broad River: debt extinguishment costs	$	30
South Point: impairment loss	95
Total loss recorded for this transaction	$	125