Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies (Details)

v3.20.4
Commitments and Contingencies (Details) - GCI Holdings - USD ($)
$ in Millions
Jan. 01, 2021
Dec. 17, 2020
Oct. 10, 2018
Dec. 31, 2020
Other Commitments [Line Items]        
Liability recognized   $ 12.0    
Minimum        
Other Commitments [Line Items]        
Additional loss   0.0    
Maximum        
Other Commitments [Line Items]        
Additional loss   $ 44.0    
Rural Health Care ("RHC") Program        
Other Commitments [Line Items]        
Reduction of rural rate     26.00%  
Reduction in support payment due to reduction of rural rate     $ 27.8  
Rural Health Care ("RHC") Program | Subsequent event        
Other Commitments [Line Items]        
Account receivables collected $ 174.0      
Rural Health Care ("RHC") Program | Trade and other receivable        
Other Commitments [Line Items]        
Net accounts receivable       $ 237.0