v3.19.1

Quarterly Consolidated Financial Data (unaudited) | 12 Months Ended
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Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract] |
Quarterly Consolidated Financial Data (unaudited) | Quarterly Consolidated Financial Data (unaudited) Our quarterly operating results have fluctuated in the past and may continue to do so in the future as a result of a number of factors, including, but not limited to, our restructuring activities (including asset sales and dispositions), the completion of development projects, the timing and amount of curtailment of operations under the terms of certain PPAs, the degree of risk management and marketing, hedging, optimization and trading activities, energy commodity market prices and variations in levels of production. Furthermore, the majority of the dollar value of capacity payments under certain of our PPAs are received during the months of May through October.
| Quarter Ended
| December 31 |  | September 30 |  | June 30 |  | March 31
| (in millions)
2018 |  |  |  |  |  |  |
Operating revenues | $ | 2,354 |  |  | $ | 2,890 |  |  | $ | 2,259 |  |  | $ | 2,009 |
Income (loss) from operations | $ | 105 |  |  | $ | 568 |  |  | $ | 417 |  |  | $ | (328 | )
Net income (loss) attributable to Calpine | $ | (16 | ) |  | $ | 272 |  |  | $ | 352 |  |  | $ | (598 | )
2017 |  |  |  |  |  |  |
Operating revenues | $ | 1,801 |  |  | $ | 2,586 |  |  | $ | 2,084 |  |  | $ | 2,281 |
Income (loss) from operations | $ | (100 | ) |  | $ | 393 |  |  | $ | 13 |  |  | $ | 72 |
Net income (loss) attributable to Calpine | $ | (292 | ) |  | $ | 225 |  |  | $ | (216 | ) |  | $ | (56 | )

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- Definition The entire disclosure for quarterly financial data. Includes, but is not limited to, tabular presentation of financial information for fiscal quarters, effect of year-end adjustments, and an explanation of matters or transactions that affect comparability of the information. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -URI http://asc.fasb.org/topic&trid=2126967 + Details
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