v2.4.0.8

Earnings (Loss) per Share (Tables)

6 Months Ended

Jun. 30, 2014

Earnings (Loss) per Share [Abstract]

Schedule of Weighted Average Number of Shares [Table Text Block]

Reconciliations of the amounts used in the basic and diluted earnings (loss) per common share computations for the three and six months ended June 30, 2014 and 2013, are as follows (shares in thousands):

	Three Months Ended June 30,						Six Months Ended June 30,
	2014			2013			2014			2013
Diluted weighted average shares calculation:
Weighted average shares outstanding (basic)	416,507			447,558			418,296			449,620
Share-based awards	4,841			—			4,401			—
Weighted average shares outstanding (diluted)	421,348			447,558			422,697			449,620

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share

We excluded the following items from diluted earnings (loss) per common share for the three and six months ended June 30, 2014 and 2013, because they were anti-dilutive (shares in thousands):

	Three Months Ended June 30,						Six Months Ended June 30,
	2014			2013			2014			2013
Share-based awards	2,854			10,002			5,066			9,741

X

- Details

Name:	cpn_EarningsLossPerShareAbstract
Namespace Prefix:	cpn_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 260

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

+ Details

Name:	us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of the weighted average number of shares used in calculating basic net earnings per share (or unit) and diluted earnings per share (or unit).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 260

-SubTopic 10

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

+ Details

Name:	us-gaap_ScheduleOfWeightedAverageNumberOfSharesTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration