Commitment, Contingencies And Guarantees: Manufactured Gas Plants (Details) - Manufactured Gas Plant - Black Hills Energy - Iowa Gas - USD ($) $ in Millions |
6 Months Ended | |
|---|---|---|
Jun. 30, 2025 |
Dec. 31, 2024 |
|
| Loss Contingencies [Line Items] | ||
| Insurance Settlements Receivable, Noncurrent | $ 1.5 | |
| Accrual for Environmental Loss Contingencies, Gross, Total | $ 9.7 | |
| Site remediation cost | 11.5 | |
| Insurance recovery asset | $ 1.5 |
| X | ||||||||||
- Definition Insurance recovery assets. No definition available.
|
| X | ||||||||||
- Definition Remediation cost No definition available.
|
| X | ||||||||||
- Definition Undiscounted amount of the accrual for environmental loss contingencies. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Carrying amount due after one year of the balance sheet date (or one operating cycle, if longer) of amount due in settlement of a claim for reimbursement from an insurance company when the Company has suffered a loss covered under an insurance policy. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- 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/2003/role/disclosureRef
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|