OPUC (Details 3) $ in Millions	12 Months Ended
Oct. 31, 2020 USD ($)
Distribution \| Cascade Natural Gas [Member] \| Subsequent Event [Member] \| Tax Cuts and Jobs Act [Member] \| OPUC [Member]
Public Utilities, General Disclosures [Line Items]
Public Utilities, Approved One-Time Increase (Decrease) to Customers, Amount	$ (1.4)

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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