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Revenue (Tables) | 3 Months Ended
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Dec. 31, 2018
Revenue from Contract with Customer [Abstract] |
State [Table Text Block] |
Operating Revenues By State Three Months Ended December 31 (in millions)
| 2018 |  | 2017
Alabama | $ | 392 |  |  | $ | 361 |
Georgia | 67 |  |  | 63 |
Kentucky | 168 |  |  | 159 |
Mississippi | 251 |  |  | 237 |
North Carolina | 20 |  |  | 16 |
Tennessee | 1,771 |  |  | 1,660 |
Virginia | 12 |  |  | 12 |
Subtotal | 2,681 |  |  | 2,508 |
Off-system sales | — |  |  | 2 |
Revenue capitalized during pre-commercial plant operations(1) | — |  |  | (1 | )
Revenue from sales of electricity | 2,681 |  |  | 2,509 |
Other revenues | 44 |  |  | 40 |
Total operating revenues | $ | 2,725 |  |  | $ | 2,549 |

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