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Revenue (Tables) | 3 Months Ended
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Mar. 31, 2021
Revenue from Contract with Customer [Abstract] |
Summary of Revenue | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three months ended March 31, 2021 | ​ | Three months ended March 31, 2020
​ | ​ | ​ | ​ | ​ | Cost- | ​ | ​ | ​ | ​ | ​ | Cost- | ​ | ​
​ | ​ | Earning | ​ | Recovery | ​ | Total | ​ | Earning | ​ | Recovery | ​ | Total
(in millions) |  | Activities |  | Activities | ​ | Consolidated |  | Activities |  | Activities |  | Consolidated
Revenues from contracts with customers1,2 | ​ | $ | 1,704 | ​ | $ | 1,195 | ​ | $ | 2,899 | ​ | $ | 1,624 |  | $ | 718 |  | $ | 2,342
Alternative revenue programs and other operating revenue3 | ​ |  | 63 | ​ |  | (9) | ​ |  | 54 | ​ |  | 117 |  | ​ | 321 |  | ​ | 438
Total operating revenue | ​ | $ | 1,767 | ​ | $ | 1,186 | ​ | $ | 2,953 | ​ | $ | 1,741 | ​ | $ | 1,039 | ​ | $ | 2,780
1 | In the absence of a 2021 GRC, SCE recorded CPUC revenue based on the 2020 authorized revenue requirements until a GRC decision is issued. For further information, see Note 1.
2 | At March 31, 2021 and December 31, 2020, SCE’s receivables related to contracts from customers were $1.6 billion and $1.5 billion, respectively, which include accrued unbilled revenue of $673 million and $521 million, respectively.
3 | Includes differences between amounts billed and authorized levels for both the CPUC and FERC.

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