Borrowings and Other Financing Instruments, Credit Facility (Details) - USD ($) $ in Millions |
Sep. 30, 2026 |
Dec. 31, 2025 |
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| Payable to Affiliates | ||||||
| Line of Credit Facility [Line Items] | ||||||
| Notes Payable, Current | $ 0 | $ 0 | ||||
| Revolving Credit Facility [Member] | ||||||
| Line of Credit Facility [Line Items] | ||||||
| Credit Facility | [1] | 150 | ||||
| Outstanding | [2] | 0 | ||||
| Available | $ 150 | |||||
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- Definition Represents the aggregate of total long-term debt, including current maturities and short-term debt. No definition available.
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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/2003/role/disclosureRef
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Sum of the carrying values as of the balance sheet date of the portions of long-term notes payable due within one year or the operating cycle if longer. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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