Basis of Presentation (Details) $ in Millions |
3 Months Ended | 9 Months Ended | |||
|---|---|---|---|---|---|
Aug. 06, 2020 |
Sep. 30, 2020
USD ($)
|
Sep. 30, 2019
USD ($)
|
Sep. 30, 2020
USD ($)
|
Sep. 30, 2019
USD ($)
|
|
| Liberty Media | |||||
| Related Party Transaction [Line Items] | |||||
| Reimbursable amount | $ 2.0 | $ 2.3 | $ 6.1 | $ 6.8 | |
| Liberty Broadband | GCI Liberty Inc | Series A and B common stock | |||||
| Related Party Transaction [Line Items] | |||||
| Business combination shares issued ratio | 0.58 | ||||
| Liberty Broadband | GCI Liberty Inc | Series A redeemable preferred stock | |||||
| Related Party Transaction [Line Items] | |||||
| Business combination shares issued ratio | 1 | ||||
| CEO | Liberty Media | |||||
| Related Party Transaction [Line Items] | |||||
| CEO compensation allocation percentage | 14.00% | ||||
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