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Revenue (Tables) | 6 Months Ended
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Jun. 30, 2019
Revenue from Contract with Customer [Abstract] |
Disaggregation of Revenue | The following table provides detail of Pinnacle West's consolidated revenue disaggregated by revenue sources (dollars in thousands):
|  | Three Months Ended June 30, |  | Six Months Ended June 30,
|  | 2019 | 2018 |  | 2019 | 2018
Retail residential electric service |  | $ | 432,568 |  | $ | 500,247 |  |  | $ | 784,134 |  | $ | 816,922 |
Retail non-residential electric service |  | 395,929 |  | 435,500 |  |  | 728,597 |  | 778,689 |
Wholesale energy sales |  | 21,991 |  | 15,392 |  |  | 58,443 |  | 27,481 |
Transmission services for others |  | 15,157 |  | 15,489 |  |  | 30,406 |  | 30,334 |
Other sources |  | 3,856 |  | 7,495 |  |  | 8,451 |  | 13,411 |
Total operating revenues |  | $ | 869,501 |  | $ | 974,123 |  |  | $ | 1,610,031 |  | $ | 1,666,837 |

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