Leases - weighted-Average Remaining Lease Terms and Weighted-Average Discount Rates (Details) - NW Natural |
Jun. 30, 2026 |
Dec. 31, 2025 |
Jun. 30, 2025 |
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| Lessee, Lease, Description [Line Items] | |||
| Weighted-average remaining lease term (years) | 13 years 9 months 18 days | 14 years 3 months 18 days | 14 years 9 months 18 days |
| Weighted-average discount rate | 7.30% | 7.30% | 7.30% |
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- Definition 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. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Weighted average discount rate for operating lease calculated at point in time. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Details
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