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v3.23.2

Subsequent Event (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022 | Sep. 30, 2022
Subsequent Event [Line Items] |  |  |  |  |  |
Redemptions and repurchases of power bonds |  |  | $ 29 | [1] | $ 28 |
Current regulatory assets | $ 236 |  | 236 |  |  | $ 138
Operating and maintenance | 896 | $ 722 | 2,546 |  | 2,269 |
Interest expense | 264 | $ 264 | 794 |  | $ 791 |
Non-current regulatory assets | 5,666 |  | 5,666 |  |  | 6,134
Regulatory Liability, Noncurrent | 59 |  | 59 |  |  | 172
Unrealized gains/losses on commodity derivatives |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Regulatory Liability, Noncurrent | 1 |  | 1 |  |  | 102
Unrealized gains/losses on commodity derivatives |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Current regulatory assets | 180 |  | 180 |  |  | 14
Non-current regulatory assets | $ 78 |  | $ 78 |  |  | $ 1
[1] | (1) The 2023 Series A Bonds were issued at 99.187 percent of par. (2) All redemptions were at 100 percent of par.

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