Business, Basis of Presentation, and Summary of Significant Accounting Policies (Details)	Sep. 30, 2026 GW
Property, Plant, and Equipment [Line Items]
Generation capacity	15.5
Nuclear fuel
Property, Plant, and Equipment [Line Items]
Generation capacity	2.2

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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