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Revenue (Tables) | 12 Months Ended
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Dec. 31, 2018
Revenue from Contract with Customer [Abstract] |
Summary of Revenue | The following table is a summary of SCE's revenue:
| Years ended December 31,
| 2018 | 2017 | 2016
(in millions) | Earning Activities | Cost- Recovery Activities | Total Consolidated | Earning Activities | Cost-Recovery Activities | Total Consolidated | Earning Activities | Cost-Recovery Activities | Total Consolidated
Revenues from contracts with customers 1,2 | $ | 6,519 |  | $ | 5,611 |  | $ | 12,130 |  | * |  | * |  | * |  | * |  | * |  | * |
Alternative revenue programs and other operating revenue | 41 |  | 440 |  | 481 |  | * |  | * |  | * |  | * |  | * |  | * |
Total operating revenue | $ | 6,560 |  | $ | 6,051 |  | $ | 12,611 |  | $ | 6,611 |  | $ | 5,643 |  | $ | 12,254 |  | $ | 6,504 |  | $ | 5,326 |  | $ | 11,830 |
* As discussed in Note 1, prior period amounts have not been adjusted under the modified retrospective method.
1 | During the year ended December 31, 2018, SCE recorded CPUC revenue based on the 2017 authorized revenue requirements adjusted for the July 2017 cost of capital decision and Tax Reform pending the outcome of the 2018 GRC. These revenue adjustments are included in "Revenues from contracts with customers." For further information, see Note 1.
2 | At December 31, 2018 and 2017, SCE's receivables related to contracts from customers were $1.1 billion and $825 million, respectively, which include accrued unbilled revenue of $482 million and $212 million, respectively.

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