Contractual Obligations, Commercial Commitments and Contingencies (Narrative) (Details) $ in Millions |
Sep. 30, 2026
USD ($)
|
|---|---|
| Utility [Member] | |
| Public Utility, Property, Plant and Equipment [Line Items] | |
| Business Combination, Indemnification Asset, Acquisition Date, Amount | $ 39.3 |
| Debt Obligation on 4.9% Equity Ownership [Member] | Subsidiaries [Member] | |
| Public Utility, Property, Plant and Equipment [Line Items] | |
| Equity ownership interest | 4.90% |
| Equity ownership interest aggregate cost | $ 43.1 |
| Electric Generation Company [Member] | Subsidiaries [Member] | |
| Public Utility, Property, Plant and Equipment [Line Items] | |
| Debt obligation | $ 878.6 |
| X | ||||||||||
- Definition Equity ownership interest guaranteed portion of Long-term Debt Obligation No definition available.
|
| X | ||||||||||
- Definition The noncontrolling equity interest in an electric generation company, accounted for under the cost method of accounting. No definition available.
|
| X | ||||||||||
- Definition Amount of indemnification asset recognized at acquisition date in business combination. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount of long-term debt and lease obligation, classified as noncurrent. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| 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. No definition available.
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|