Income Taxes (Tables)

6 Months Ended

Jun. 30, 2011

Income Taxes [Abstract]

Income tax expense table

	Three Months Ended June 30,						Six Months Ended June 30,
	2011			2010			2011			2010
Income tax expense (benefit)	$	18		$	6		$	(65	)(1)	$	17	(2)
Imputed tax rate		(35	)%		(5	)%		15	%		(11	)%
Intraperiod tax allocation expense (benefit)	$	18		$	(31	)	$	(16	)	$	(17	)

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(1) Includes a tax benefit of approximately $76 million related to the consolidation of the CCFC and Calpine groups for federal income tax reporting purposes for the six months ended June 30, 2011 (as described below).

(2) Includes approximately $13 million in intraperiod tax expense related to a prior period with an offsetting benefit in OCI.

Schedule of income tax expense benefit intraperiod tax allocation

	Six Months Ended June 30,
	Included in continuing operations						Included in discontinued operations				Included in OCI
	2011			2010			2011		2010		2011		2010
Intraperiod tax allocations expense (benefit)	$	(16	)	$	(17	)	$	—	$	8	$	16	$	9

Schedule of income tax expense benefit intraperiod tax allocation

Intraperiod Tax Allocation — In accordance with U.S. GAAP, intraperiod tax allocation provisions require allocation of a tax expense (benefit) to continuing operations due to current OCI gains (losses) and income from discontinued operations with an offsetting amount recognized in OCI and discontinued operations. The following table details the effects of our intraperiod tax allocations for the three and six months ended June 30, 2011 and 2010 (in millions).

	Three Months Ended June 30,
	Included in continuing operations					Included in discontinued operations				Included in OCI
	2011		2010			2011		2010		2011			2010
Intraperiod tax allocation expense (benefit)	$	18	$	(31	)	$	—	$	8	$	(18	)	$	23