Long-Term Debt and Credit Facilities - Lumen Credit Agreements (Details) - USD ($) |
Mar. 31, 2026 |
Dec. 31, 2025 |
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| Line of Credit | Revolving Credit Facility | ||
| Long-term Debt and Credit Facilities | ||
| Available borrowing capacity | $ 769,000,000 | |
| Series A Revolving Credit Facility | ||
| Long-term Debt and Credit Facilities | ||
| Maximum borrowing capacity | 489,000,000 | |
| Series A Revolving Credit Facility | Line of Credit | ||
| Long-term Debt and Credit Facilities | ||
| Long-term debt, gross | 0 | $ 0 |
| Series B Revolving Credit Facility | ||
| Long-term Debt and Credit Facilities | ||
| Maximum borrowing capacity | 465,000,000 | |
| Series B Revolving Credit Facility | Line of Credit | ||
| Long-term Debt and Credit Facilities | ||
| Long-term debt, gross | $ 0 | $ 0 |
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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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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 Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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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://fasb.org/us-gaap/role/ref/legacyRef
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