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v3.19.2

Revenue (Details) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 30, 2019 USD ($) Customers percent | Jun. 30, 2018 USD ($) | Jun. 30, 2019 USD ($) Customers percent | Jun. 30, 2018 USD ($)
State [Line Items] |  |  |  |
Revenue Capitalized During Pre-Commercial Operations | $ 0 | $ (1,000,000) | $ 0 | $ (11,000,000)
Electric revenue | (2,563,000,000) | (2,667,000,000) | (7,955,000,000) | (7,936,000,000)
Sales of Electricity | 2,565,000,000 | 2,669,000,000 | 7,958,000,000 | 7,931,000,000
Off System Sales of Electricity | 2,000,000 | 2,000,000 | 3,000,000 | 6,000,000
Other revenue | $ 39,000,000 | 38,000,000 | $ 121,000,000 | 117,000,000
Total number of customers | 154 |  | 154 |
Total long duration contract revenue recognition | 2,366,000,000 |  | 7,347,000,000 |
Total number of customers that represent a percent of sales | percent | 1 |  | 1 |
Revenues | $ 2,604,000,000 | 2,707,000,000 | $ 8,079,000,000 | 8,048,000,000
ALABAMA |  |  |  |
State [Line Items] |  |  |  |
Electric revenue | (367,000,000) | (383,000,000) | (1,146,000,000) | (1,152,000,000)
GEORGIA |  |  |  |
State [Line Items] |  |  |  |
Electric revenue | (59,000,000) | (59,000,000) | (196,000,000) | (196,000,000)
KENTUCKY |  |  |  |
State [Line Items] |  |  |  |
Electric revenue | (157,000,000) | (171,000,000) | (498,000,000) | (504,000,000)
MISSISSIPPI |  |  |  |
State [Line Items] |  |  |  |
Electric revenue | (250,000,000) | (258,000,000) | (751,000,000) | (746,000,000)
NORTH CAROLINA |  |  |  |
State [Line Items] |  |  |  |
Electric revenue | (15,000,000) | (14,000,000) | (56,000,000) | (49,000,000)
TENNESSEE |  |  |  |
State [Line Items] |  |  |  |
Electric revenue | (1,705,000,000) | (1,771,000,000) | (5,273,000,000) | (5,252,000,000)
VIRGINIA |  |  |  |
State [Line Items] |  |  |  |
Electric revenue | $ (10,000,000) | $ (11,000,000) | $ (35,000,000) | $ (37,000,000)
20-year Termination Notice [Member] |  |  |  |
State [Line Items] |  |  |  |
Number of customers | Customers | 3 |  | 3 |
Long-Duration Contracts Revenue Recognition, Policy [Policy Text Block] |  |  | 96 |
Number of customers that represent the percent of sales | percent | 0 |  | 0 |
Revenues | $ 28,000,000 |  |  |
15-year Termination Notice [Member] |  |  |  |
State [Line Items] |  |  |  |
Number of customers | Customers | 11 |  | 11 |
Long-Duration Contracts Revenue Recognition, Policy [Policy Text Block] |  |  | 362 |
Number of customers that represent the percent of sales | percent | 0 |  | 0 |
Revenues | $ 112,000,000 |  |  |
12-year Termination Notice [Member] |  |  |  |
State [Line Items] |  |  |  |
Number of customers | Customers | 1 |  | 1 |
Long-Duration Contracts Revenue Recognition, Policy [Policy Text Block] |  |  | 19 |
Number of customers that represent the percent of sales | percent | 0 |  | 0 |
Revenues | $ 6,000,000 |  |  |
10-year Termination Notice [Member] |  |  |  |
State [Line Items] |  |  |  |
Number of customers | Customers | 52 |  | 52 |
Long-Duration Contracts Revenue Recognition, Policy [Policy Text Block] |  |  | 2536 |
Number of customers that represent the percent of sales | percent | 0 |  | 0 |
Revenues | $ 822,000,000 |  |  |
6-year Termination Notice [Member] |  |  |  |
State [Line Items] |  |  |  |
Number of customers | Customers | 1 |  | 1 |
Long-Duration Contracts Revenue Recognition, Policy [Policy Text Block] |  |  | 36 |
Number of customers that represent the percent of sales | percent | 0 |  | 0 |
Revenues | $ 11,000,000 |  |  |
5-year termination notice [Member] |  |  |  |
State [Line Items] |  |  |  |
Number of customers | Customers | 86 |  | 86 |
Long-Duration Contracts Revenue Recognition, Policy [Policy Text Block] |  |  | 4298 |
Number of customers that represent the percent of sales | percent | 1 |  | 1 |
Revenues | $ 1,387,000,000 |  |  |

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