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Revenue (Tables) | 6 Months Ended
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Mar. 31, 2019
Revenue from Contract with Customer [Abstract] |
State [Table Text Block] | TVA’s revenues by state for the three and six months ended March 31, 2019 and 2018 are detailed in the table below:
Operating Revenues By State (in millions)
| Three Months Ended March 31 |  | Six Months Ended March 31
| 2019 |  | 2018 |  | 2019 |  | 2018
Alabama | $ | 387 |  |  | $ | 406 |  |  | $ | 779 |  |  | $ | 767 |
Georgia | 70 |  |  | 73 |  |  | 137 |  |  | 136 |
Kentucky | 173 |  |  | 174 |  |  | 341 |  |  | 333 |
Mississippi | 249 |  |  | 252 |  |  | 501 |  |  | 489 |
North Carolina | 21 |  |  | 20 |  |  | 41 |  |  | 36 |
Tennessee | 1,799 |  |  | 1,822 |  |  | 3,568 |  |  | 3,482 |
Virginia | 13 |  |  | 14 |  |  | 25 |  |  | 26 |
Subtotal | 2,712 |  |  | 2,761 |  |  | 5,392 |  |  | 5,269 |
Off-system sales | — |  |  | 2 |  |  | 1 |  |  | 4 |
Revenue capitalized during pre-commercial plant operations(1) | — |  |  | (10 | ) |  | — |  |  | (11 | )
Revenue from sales of electricity | 2,712 |  |  | 2,753 |  |  | 5,393 |  |  | 5,262 |
Other revenues | 38 |  |  | 39 |  |  | 82 |  |  | 79 |
Total operating revenues | $ | 2,750 |  |  | $ | 2,792 |  |  | $ | 5,475 |  |  | $ | 5,341 |
Note (1) Represents revenue capitalized during pre-commercial operations of $10 million and $11 million for the three and six months ended March 31, 2018, respectively. See Note 1 — Pre-Commercial Plant Operations.

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