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Regulatory Assets and Liabilities (Tables)

3 Months Ended

Dec. 31, 2024

Regulatory Assets and Liabilities Disclosure [Abstract]

Regulatory Assets and Liabilities

Components of regulatory assets and regulatory liabilities are summarized in the table below.

Regulatory Assets and Liabilities (in millions)
			At December 31, 2024						At September 30, 2024
Current regulatory assets
Unrealized losses on commodity derivatives			$	55					$	102
Unrealized losses on interest rate derivatives			46						54
Fuel cost adjustment receivable			9						35
Total current regulatory assets			110						191
Non-current regulatory assets
Non-nuclear decommissioning costs			6,202						6,187
Retirement benefit plans deferred costs			1,959						1,979
Nuclear decommissioning costs			440						362
Unrealized losses on interest rate derivatives			282						447
Environmental compliance and remediation costs			215						215
Unrealized losses on commodity derivatives			32						64
Other non-current regulatory assets			157						154
Total non-current regulatory assets			9,287						9,408
Total regulatory assets			$	9,397					$	9,599
Current regulatory liabilities
Fuel cost adjustment tax equivalents			$	169					$	169
Unrealized gains on commodity derivatives			17						5
Total current regulatory liabilities			186						174
Non-current regulatory liabilities
Retirement benefit plans deferred credits			77						81
Unrealized gains on commodity derivatives			1						2
Total non-current regulatory liabilities			78						83
Total regulatory liabilities			$	264					$	257

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- Definition

Tabular disclosure of assets and liabilities that are created when regulatory agencies permit public utilities to defer certain costs included in rate-setting to the balance sheet or that result from rate actions of a regulator. Rate actions of a regulator can impose a liability on a regulated enterprise resulting in a regulatory liability. Regulatory liabilities can result from obligations to make refunds to customers or deferral of gains that will be credited to customers in future periods

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