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Subsequent Event (Details) - USD ($) $ in Millions | 3 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Jan. 30, 2023 | Sep. 30, 2022
Subsequent Event [Line Items] |  |  |  |
Redemptions and repurchases of power bonds | $ 1 | $ 1 |  |
Increase/Decrease in Interest Rate Swap Liability | 90 |  |  |
Current regulatory assets | 320 |  |  | $ 138
Operating and maintenance | 827 | 780 |  |
Interest expense | 262 | $ 263 |  |
Non-current regulatory assets | 5,909 |  |  | 6,134
Regulatory Liability, Noncurrent | 109 |  |  | 172
Commodity Contract under FHP |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Derivative Liability, Fair Value of Collateral | 3 |  |  |
Unrealized gains/losses on commodity derivatives |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Regulatory Liability, Noncurrent | 43 |  |  | 102
Unrealized gains/losses on commodity derivatives |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Current regulatory assets | 137 |  |  | 14
Non-current regulatory assets | $ 15 |  |  | $ 1
Forecast | DeferredDerivativeGainLossUnderFHP |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Regulatory Liability, Noncurrent |  |  | $ 175 |

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- Definition Carrying amount as of the balance sheet date of capitalized costs of regulated entities that are expected to be recovered through revenue sources within one year or the normal operating cycle, if longer. Such costs are capitalized if they meet both of the following criteria: a. It is probable that future revenue in an amount at least equal to the capitalized cost will result from inclusion of that cost in allowable costs for rate-making purposes. b. Based on available evidence, the future revenue will be provided to permit recovery of the previously incurred cost rather than to provide for expected levels of similar future costs. If the revenue will be provided through an automatic rate-adjustment clause, this criterion requires that the regulator's intent clearly be to permit recovery of the previously incurred cost. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 340 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=6499975&loc=d3e44250-110382 + Details
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