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Revenue (Tables) | 9 Months Ended
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Jun. 30, 2020
Revenue from Contract with Customer [Abstract] |
State [Table Text Block] | TVA's operating revenues by state for the three and nine months ended June 30, 2020 and 2019, are detailed in the table below:
Operating Revenues By State (in millions) |  |  |  |  |  |  |
| Three Months Ended June 30 |  |  |  | Nine Months Ended June 30 |  |
| 2020 |  | 2019 |  | 2020 |  | 2019
Alabama | $ | 312 |  |  | $ | 367 |  |  | $ | 1,041 |  |  | $ | 1,146 |
Georgia | 52 |  |  | 59 |  |  | 179 |  |  | 196 |
Kentucky | 140 |  |  | 157 |  |  | 455 |  |  | 498 |
Mississippi | 204 |  |  | 250 |  |  | 668 |  |  | 751 |
North Carolina | 13 |  |  | 15 |  |  | 50 |  |  | 56 |
Tennessee | 1,485 |  |  | 1,705 |  |  | 4,809 |  |  | 5,273 |
Virginia | 9 |  |  | 10 |  |  | 32 |  |  | 35 |
Subtotal | 2,215 |  |  | 2,563 |  |  | 7,234 |  |  | 7,955 |
Off-system sales | 1 |  |  | 2 |  |  | 3 |  |  | 3 |
Revenue from sales of electricity | 2,216 |  |  | 2,565 |  |  | 7,237 |  |  | 7,958 |
Other revenue | 35 |  |  | 39 |  |  | 113 |  |  | 121 |
Total operating revenues | $ | 2,251 |  |  | $ | 2,604 |  |  | $ | 7,350 |  |  | $ | 8,079 |
Revenue from External Customers by Products and Services [Table Text Block] | TVA's operating revenues by customer type for the three and nine months ended June 30, 2020 and 2019, are detailed in the table below:
Operating Revenues by Customer Type (in millions) |  |  |  |  |  |  |
| Three Months Ended June 30 |  |  |  | Nine Months Ended June 30 |  |
| 2020 |  | 2019 |  | 2020 |  | 2019
Revenue from sales of electricity |  |  |  |  |  |  |
Local power companies(1) | $ | 2,058 |  |  | $ | 2,366 |  |  | $ | 6,716 |  |  | $ | 7,347 |
Industries directly served | 132 |  |  | 168 |  |  | 442 |  |  | 521 |
Federal agencies and other | 26 |  |  | 31 |  |  | 79 |  |  | 90 |
Revenue from sales of electricity | 2,216 |  |  | 2,565 |  |  | 7,237 |  |  | 7,958 |
Other revenue | 35 |  |  | 39 |  |  | 113 |  |  | 121 |
Total operating revenues | $ | 2,251 |  |  | $ | 2,604 |  |  | $ | 7,350 |  |  | $ | 8,079 |
Note (1) The amount for the three and nine months ended June 30, 2020, is net of $38 million and $108 million, respectively, of wholesale bill credits to LPCs participating in the long-term Partnership Agreement.

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- Definition Tabular disclosure of entity-wide revenues from external customers for each product or service or each group of similar products or services if the information is not provided as part of the reportable operating segment information. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 40 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9031-108599 + Details
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