Basis of Presentation (Details) - USD ($) $ / shares in Units, $ in Millions |
9 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
Jul. 14, 2025 |
Sep. 30, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Basis of Presentation | ||||
| Distribution to former parent | $ 150 | $ 65 | ||
| Net deferred tax asset | $ 39 | |||
| State income taxes payable | $ 91 | $ 91 | ||
| GCI Business | ||||
| Basis of Presentation | ||||
| Percentage of interest | 100.00% | 100.00% | ||
| Separation of GCI Liberty from Liberty Broadband | ||||
| Basis of Presentation | ||||
| Number of shares issued | 10,000 | |||
| Fee payable | $ 5 | |||
| Affiliated Entity | Liberty Broadband | ||||
| Basis of Presentation | ||||
| Number of shares issued | 10,000 | |||
| Non-voting preferred stock sold | $ 10 | |||
| Dividend rate | 12.00% | |||
| Liquidation price | $ 1,000 | |||
| Federal income taxes payable cancelled | 206 | |||
| Other receivables | $ 91 | $ 98 | $ 5 | |
| Affiliated Entity | Liberty Media | ||||
| Basis of Presentation | ||||
| Fee payable | 5 | |||
| Amount reimbursable | $ 1 | |||
| X | ||||||||||
- Definition Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset. No definition available.
|
| X | ||||||||||
- Definition Amount of federal income taxes payable that were cancelled. No definition available.
|
| X | ||||||||||
- Definition Amount of maximum service fee payable under separation agreement. No definition available.
|
| X | ||||||||||
- Definition Percentage of outstanding equity interests held in entities. No definition available.
|
| X | ||||||||||
- Definition The value of the non-voting preferred stock sold. No definition available.
|
| X | ||||||||||
- Definition Amount reimbursed for the expense incurred. No definition available.
|
| 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, before allowance, of receivables classified as other, due within one year or the operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Cash outflow in the form of capital distributions and dividends to common shareholders, preferred shareholders and noncontrolling interests. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition The percentage rate used to calculate dividend payments on preferred stock. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition The per share liquidation preference (or restrictions) of nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) that has a preference in involuntary liquidation considerably in excess of the par or stated value of the shares. The liquidation preference is the difference between the preference in liquidation and the par or stated values of the share. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Number of new stock issued during the period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Carrying value as of the balance sheet date of obligations incurred and payable for statutory income, sales, use, payroll, excise, real, property and other taxes. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|