WUTC (Details 5) $ in Millions	Jan. 23, 2023 USD ($)
Gas Distribution [Member] \| WUTC [Member] \| Cascade Natural Gas [Member] \| Subsequent Event [Member]
Public Utilities, General Disclosures [Line Items]
Public Utilities, Denied Rate Increase (Decrease), Amount	$ 3.3

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.

No definition available.

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