Quarterly report pursuant to Section 13 or 15(d)

Earnings Attributable to GCI Liberty Stockholders Per Common Share (Details)

v3.10.0.1
Earnings Attributable to GCI Liberty Stockholders Per Common Share (Details) - shares
3 Months Ended 9 Months Ended
Mar. 09, 2018
Sep. 30, 2018
Sep. 30, 2018
Earnings Per Share [Abstract]      
Basic WASO 109,004,250 107,631,000 107,693,000
Diluted WASO   109,061,000 107,693,000
Antidilutive shares excluded from diluted WASO   0 1,499,000