v3.19.3.a.u2

Quarterly Consolidated Financial Data (unaudited) (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating revenues | $ 2,082 | $ 2,792 | $ 2,599 | $ 2,599 | $ 2,354 | $ 2,890 | $ 2,259 | $ 2,009 | $ 10,072 | [1] | $ 9,512 | [1] | $ 8,752 | [1]
Income (loss) from operations | 108 | 682 | 444 | 358 | 105 | 568 | 417 | (328) | 1,592 |  | 762 |  | 378 |
Net income (loss) attributable to Calpine | $ (156) | $ 485 | $ 266 | $ 175 | $ (16) | $ 272 | $ 352 | $ (598) | $ 770 |  | $ 10 |  | $ (339) |
[1] | Includes intersegment revenues of $530 million, $488 million and $324 million in the West, $946 million, $573 million and $361 million in Texas, $522 million, $234 million and $237 million in the East and $11 million, $4 million, $4 million in Retail for the years ended December 31, 2019, 2018 and 2017, respectively.

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