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Revenue (Tables) | 6 Months Ended
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Jun. 30, 2018
Revenue from Contract with Customer [Abstract] |
Disaggregation of Revenue | The following tables represent a disaggregation of revenue from contracts with customers for the three and six months ended June 30, 2018, by type of service from each reportable segment:
|  | For the Three Months Ended June 30, 2018
Revenues by Type of Service |  | Regulated Distribution |  | Regulated Transmission |  | Corporate/Other and Reconciling Adjustments (1) |  | Total
|  | (In millions)
Distribution services(2) |  | $ | 1,228 |  |  | $ | — |  |  | $ | (43 | ) |  | $ | 1,185 |
Retail generation |  | 882 |  |  | — |  |  | (14 | ) |  | 868 |
Wholesale sales(2) |  | 121 |  |  | — |  |  | 84 |  |  | 205 |
Transmission(2) |  | — |  |  | 336 |  |  | — |  |  | 336 |
Other |  | 35 |  |  | — |  |  | — |  |  | 35 |
Total revenues from contracts with customers |  | $ | 2,266 |  |  | $ | 336 |  |  | $ | 27 |  |  | $ | 2,629 |
ARP |  | 60 |  |  | — |  |  | — |  |  | 60 |
Other non-customer revenue |  | 26 |  |  | 5 |  |  | (16 | ) |  | 15 |
Total revenues |  | $ | 2,352 |  |  | $ | 341 |  |  | $ | 11 |  |  | $ | 2,704 |
(1) Includes eliminations and reconciling adjustments of inter-segment revenues. (2) Includes $8 million in net reductions to revenue related to amounts subject to refund resulting from the Tax Act ($10 million subject to refund at Regulated Distribution, partially offset by $2 million subject to recovery at Regulated Transmission).
|  | For the Six Months Ended June 30, 2018
Revenues by Type of Service |  | Regulated Distribution |  | Regulated Transmission |  | Corporate/Other and Reconciling Adjustments (1) |  | Total
|  | (In millions)
Distribution services(2) |  | $ | 2,509 |  |  | $ | — |  |  | $ | (55 | ) |  | $ | 2,454 |
Retail generation |  | 1,922 |  |  | — |  |  | (28 | ) |  | 1,894 |
Wholesale sales(2) |  | 244 |  |  | — |  |  | 204 |  |  | 448 |
Transmission(2) |  | — |  |  | 655 |  |  | — |  |  | 655 |
Other |  | 70 |  |  | — |  |  |  |  | 70 |
Total revenues from contracts with customers |  | $ | 4,745 |  |  | $ | 655 |  |  | $ | 121 |  |  | $ | 5,521 |
ARP |  | 124 |  |  | — |  |  | — |  |  | 124 |
Other non-customer revenue |  | 59 |  |  | 9 |  |  | (33 | ) |  | 35 |
Total revenues |  | $ | 4,928 |  |  | $ | 664 |  |  | $ | 88 |  |  | $ | 5,680 |
(1) Includes eliminations and reconciling adjustments of inter-segment revenues. (2) Includes $84 million in reductions to revenue related to amounts subject to refund resulting from the Tax Act ($82 million at Regulated Distribution and $2 million at Regulated Transmission). The following table represents a disaggregation of the Regulated Distribution segment revenue from contracts with distribution service and retail generation customers for the three and six months ended June 30, 2018, by class:
|  | For the Three Months Ended June 30, 2018 |  | For the Six Months Ended June 30, 2018
Revenues by Customer Class |
|  | (In millions)
Residential |  | $ | 1,255 |  |  | $ | 2,718 |
Commercial |  | 570 |  |  | 1,150 |
Industrial |  | 262 |  |  | 516 |
Other |  | 23 |  |  | 47 |
Total Revenues |  | $ | 2,110 |  |  | $ | 4,431 |
The following table represents a disaggregation of revenue from contracts with regulated transmission customers for the three and six months ended June 30, 2018, by transmission owner:
|  | For the Three Months Ended June 30, 2018 |  | For the Six Months Ended June 30, 2018
Revenues from Contracts with Customers by Transmission Asset Owner |
|  | (In millions)
ATSI |  | $ | 167 |  |  | $ | 325 |
TrAIL |  | 63 |  |  | 123 |
MAIT |  | 34 |  |  | 64 |
Other |  | 72 |  |  | 143 |
Total Revenues |  | $ | 336 |  |  | $ | 655 |

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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=82913847&loc=SL49130545-203045 + Details
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