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Revenue (Tables) | 3 Months Ended
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Mar. 31, 2020
Revenue from Contract with Customer [Abstract] |
Disaggregation of Revenue | The following table represents a disaggregation of the Regulated Distribution segment revenue from contracts with distribution service and retail generation customers for the three months ended March 31, 2020 and 2019, by class:
|  | For the Three Months Ended March 31,
Revenues by Customer Class |  | 2020 |  | 2019
|  | (In millions)
Residential |  | $ | 1,319 |  |  | $ | 1,484 |
Commercial |  | 544 |  |  | 587 |
Industrial |  | 277 |  |  | 249 |
Other |  | 20 |  |  | 24 |
Total Revenues |  | $ | 2,160 |  |  | $ | 2,344 |
The following table represents a disaggregation of revenue from contracts with regulated transmission customers by transmission owner for the three months ended March 31, 2020 and 2019, by transmission owner:
|  | For the Three Months Ended March 31,
Transmission Owner |  | 2020 |  | 2019
|  | (In millions)
ATSI |  | $ | 204 |  |  | $ | 174 |
TrAIL |  | 63 |  |  | 58 |
MAIT |  | 57 |  |  | 49 |
Other |  | 73 |  |  | 71 |
Total Revenues |  | $ | 397 |  |  | $ | 352 |
The following tables represent a disaggregation of revenue from contracts with customers for the three months ended March 31, 2020 and 2019, by type of service from each reportable segment:
|  | For the Three Months Ended March 31, 2020
Revenues by Type of Service |  | Regulated Distribution |  | Regulated Transmission |  | Corporate/Other and Reconciling Adjustments (1) |  | Total
|  | (In millions)
Distribution services (2) |  | $ | 1,256 |  |  | $ | — |  |  | $ | (21 | ) |  | $ | 1,235 |
Retail generation |  | 904 |  |  | — |  |  | (15 | ) |  | 889 |
Wholesale sales |  | 71 |  |  | — |  |  | 1 |  |  | 72 |
Transmission (2) |  | — |  |  | 397 |  |  | — |  |  | 397 |
Other |  | 36 |  |  | — |  |  | — |  |  | 36 |
Total revenues from contracts with customers |  | $ | 2,267 |  |  | $ | 397 |  |  | $ | (35 | ) |  | $ | 2,629 |
ARP (3) |  | 68 |  |  | — |  |  | — |  |  | 68 |
Other non-customer revenue |  | 23 |  |  | 4 |  |  | (15 | ) |  | 12 |
Total revenues |  | $ | 2,358 |  |  | $ | 401 |  |  | $ | (50 | ) |  | $ | 2,709 |
(1) Includes eliminations and reconciling adjustments of inter-segment revenues. (2) Includes $23 million reductions to revenue related to amounts subject to refund resulting from the Tax Act, primarily at Regulated Distribution. (3) ARP revenue for the three months ended March 31, 2020, is related to the Ohio decoupling rates that became effective on February 1, 2020.
|  | For the Three Months Ended March 31, 2019
Revenues by Type of Service |  | Regulated Distribution |  | Regulated Transmission |  | Corporate/Other and Reconciling Adjustments (1) |  | Total
|  | (In millions)
Distribution services (2) |  | $ | 1,286 |  |  | $ | — |  |  | $ | (21 | ) |  | $ | 1,265 |
Retail generation |  | 1,058 |  |  | — |  |  | (14 | ) |  | 1,044 |
Wholesale sales |  | 106 |  |  | — |  |  | 4 |  |  | 110 |
Transmission (2) |  | — |  |  | 352 |  |  | — |  |  | 352 |
Other |  | 34 |  |  | — |  |  | 1 |  |  | 35 |
Total revenues from contracts with customers |  | $ | 2,484 |  |  | $ | 352 |  |  | $ | (30 | ) |  | $ | 2,806 |
ARP (3) |  | 62 |  |  | — |  |  | — |  |  | 62 |
Other non-customer revenue |  | 27 |  |  | 4 |  |  | (16 | ) |  | 15 |
Total revenues |  | $ | 2,573 |  |  | $ | 356 |  |  | $ | (46 | ) |  | $ | 2,883 |
(1) Includes eliminations and reconciling adjustments of inter-segment revenues. (2) Includes $32 million in net reductions to revenue related to amounts subject to refund resulting from the Tax Act ($27 million at Regulated Distribution and $5 million at Regulated Transmission). (3) ARP revenue for the three months ended March 31, 2019, is related to the DMR and lost distribution and shared savings revenue in Ohio.

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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/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045 + Details
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