v3.19.1

Quarterly Consolidated Financial Data (unaudited) (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating revenues | $ 2,354 | $ 2,890 | $ 2,259 | $ 2,009 | $ 1,801 | $ 2,586 | $ 2,084 | $ 2,281 | $ 9,512 | [1] | $ 8,752 | [1] | $ 6,716 | [1]
Income (loss) from operations | 105 | 568 | 417 | (328) | (100) | 393 | 13 | 72 | 762 |  | 378 |  | 839 |
Net income (loss) attributable to Calpine | $ (16) | $ 272 | $ 352 | $ (598) | $ (292) | $ 225 | $ (216) | $ (56) | $ 10 |  | $ (339) |  | $ 92 |
[1] | Includes intersegment revenues of $488 million, $324 million and $20 million in the West, $573 million, $361 million and $81 million in Texas, $234 million, $237 million and $48 million in the East and $4 million, $4 million, $2 million in Retail for the years ended December 31, 2018, 2017 and 2016, respectively.

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