Quarterly report pursuant to Section 13 or 15(d)

Acquisition - Pro Forma Revenue and Net Earnings (Details)

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Acquisition - Pro Forma Revenue and Net Earnings (Details) - GCI Liberty Inc - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2020
Business Acquisition [Line Items]    
Revenue $ 249,567 $ 715,330
Net earnings (loss) (107,934) (102,994)
Net earnings (loss) attributable to Liberty Broadband shareholders $ (107,908) $ (102,917)
Basic net earnings (loss) attributable to Series A, Series B and Series C Liberty Broadband shareholders per common share (in dollars per share) $ (0.54) $ (0.51)
Diluted net earnings (loss) attributable to Series A, Series B and Series C Liberty Broadband shareholders per common share (in dollars per share) $ (0.54) $ (0.51)