Financing: Long-term Debt (Additional Information) (Details) - USD ($) $ in Millions |
12 Months Ended | ||||
|---|---|---|---|---|---|
Jan. 15, 2026 |
Oct. 02, 2025 |
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Debt Instrument [Line Items] | |||||
| Less unamortized deferred financing costs | $ 26.1 | $ 26.1 | |||
| Repayment of long term debt | $ 0.0 | $ 600.0 | $ 525.0 | ||
| Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] | |||||
| Debt Instrument [Line Items] | |||||
| Proceeds from Issuance of Debt | $ 450.0 | ||||
| Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] | Senior Unsecured Notes Due 2031 [Member] | |||||
| Debt Instrument [Line Items] | |||||
| Stated interest rate (percent) | 4.55% | ||||
| Less unamortized deferred financing costs | $ 4.0 | ||||
| Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] | Senior Unsecured Notes Due 2026 [Member] | Subsequent Event | |||||
| Debt Instrument [Line Items] | |||||
| Stated interest rate (percent) | 3.95% | ||||
| Repayment of long term debt | $ 300.0 | ||||
| X | ||||||||||
- Definition Contractual interest rate for funds borrowed, under the debt agreement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| 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 | ||||||||||
- Definition Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|