v2.4.0.6

Quarterly Consolidated Financial Data (unaudited) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2011 | Sep. 30, 2011 | Jun. 30, 2011 | Mar. 31, 2011 | Dec. 31, 2010 | Sep. 30, 2010 | Jun. 30, 2010 | Mar. 31, 2010 | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009
Quarterly Financial Information Disclosure [Abstract] |  |  |  |  |  |  |  |  |  |  |
Operating revenues | $ 1,459 | $ 2,209 | $ 1,633 | $ 1,499 | $ 1,471 | $ 2,130 | $ 1,430 | $ 1,514 | $ 6,800 | $ 6,545 | $ 6,463
Income (loss) from operations | 196 | 403 | 183 | 18 | 89 | 554 | 108 | 150 | 800 | 901 | 1,013
Income (loss) before discontinued operations attributable to Calpine | (13) | 190 | (70) | (297) | (186) | 198 | (119) | (55) | (189) | (162) | 110
Discontinued operations, net of tax expense, attributable to Calpine | 0 | 0 | 0 | 0 | 162 | 19 | 4 | 8 | 0 | 193 | 35
Net income (loss) attributable to Calpine | $ (13) | $ 190 | $ (70) | $ (297) | $ (24) | $ 217 | $ (115) | $ (47) | $ (190) | $ 31 | $ 149
Basic earnings (loss) per common share: |  |  |  |  |  |  |  |  |  |  |
Income (loss) before discontinued operations attributable to Calpine | $ (0.03) | $ 0.39 | $ (0.14) | $ (0.61) | $ (0.38) | $ 0.41 | $ (0.25) | $ (0.11) | $ (0.39) | $ (0.33) | $ 0.24
Discontinued operations, net of tax expense, attributable to Calpine | $ 0.00 | $ 0.00 | $ 0.00 | $ 0.00 | $ 0.33 | $ 0.04 | $ 0.01 | $ 0.01 | $ 0.00 | $ 0.39 | $ 0.07
Net income (loss) attributable to Calpine | $ (0.03) | $ 0.39 | $ (0.14) | $ (0.61) | $ (0.05) | $ 0.45 | $ (0.24) | $ (0.10) | $ (0.39) | $ 0.06 | $ 0.31
Diluted earnings (loss) per common share: |  |  |  |  |  |  |  |  |  |  |
Income (loss) before discontinued operations attributable to Calpine | $ (0.03) | $ 0.39 | $ (0.14) | $ (0.61) | $ (0.38) | $ 0.41 | $ (0.25) | $ (0.11) | $ (0.39) | $ (0.33) | $ 0.24
Discontinued operations, net of tax expense, attributable to Calpine | $ 0.00 | $ 0.00 | $ 0.00 | $ 0.00 | $ 0.33 | $ 0.04 | $ 0.01 | $ 0.01 | $ 0.00 | $ 0.39 | $ 0.07
Discontinued operations, net of tax expense, attributable to Calpine | $ (0.03) | $ 0.39 | $ (0.14) | $ (0.61) | $ (0.05) | $ 0.45 | $ (0.24) | $ (0.10) | $ (0.39) | $ 0.06 | $ 0.31

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- Definition Aggregate revenue recognized during the period (derived from goods sold, services rendered, insurance premiums, or other activities that constitute an entity's earning process). For financial services companies, also includes investment and interest income, and sales and trading gains. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 5 -Section 03 -Paragraph 1 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 + Details
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