Commitments and Contingencies (Details) $ in Millions  | 
1 Months Ended | 3 Months Ended | |
|---|---|---|---|
| 
 May 05, 2021  
USD ($) 
 | 
 Oct. 31, 2020  
plaintiff 
 | 
 Mar. 31, 2021  
USD ($) 
 | 
|
| Other Commitments [Line Items] | |||
| Litigation settlement expense | $ 110 | ||
| Hollywood Firefighters' Pension Fund et al Versus GCI Liberty, Inc. et al | |||
| Other Commitments [Line Items] | |||
| Number of plaintiffs | plaintiff | 2 | ||
| Litigation settlement expense | $ 110 | 
| X | ||||||||||
- Definition Amount of litigation expense, including but not limited to legal, forensic, accounting, and investigative fees. No definition available. 
  | 
| X | ||||||||||
- Definition Number of plaintiffs that have filed claims pertaining to a loss contingency. 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. No definition available. 
  | 
| X | ||||||||||
- Details 
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