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Regulatory Assets and Liabilities Regulatory Assets and Liabilities (Tables)

12 Months Ended

Sep. 30, 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  At September 30 (in millions)
			2024						2023
Current regulatory assets
Unrealized losses on commodity derivatives			$	102					$	136
Unrealized losses on interest rate derivatives			54						31
Fuel cost adjustment receivable			35						11
Total current regulatory assets			191						178
Non-current regulatory assets
Non-nuclear decommissioning costs			6,187						2,922
Retirement benefit plans deferred costs			1,979						1,440
Unrealized losses on interest rate derivatives			447						272
Nuclear decommissioning costs			362						728
Environmental compliance and remediation costs			215						—
Unrealized losses on commodity derivatives			64						52
Other non-current regulatory assets			154						152
Total non-current regulatory assets			9,408						5,566
Total regulatory assets			$	9,599					$	5,744
Current regulatory liabilities
Fuel cost adjustment tax equivalents			$	169					$	201
Unrealized gains on commodity derivatives			5						21
Total current regulatory liabilities			174						222
Non-current regulatory liabilities
Retirement benefit plans deferred credits			81						95
Unrealized gains on commodity derivatives			2						12
Total non-current regulatory liabilities			83						107
Total regulatory liabilities			$	257					$	329

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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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