Quarterly report [Sections 13 or 15(d)]

Debt - Senior Notes and Senior Credit Facility (Details)

v3.25.1
Debt - Senior Notes and Senior Credit Facility (Details) - USD ($)
$ in Millions
Mar. 25, 2025
Mar. 24, 2025
Jun. 12, 2023
May 01, 2023
Mar. 31, 2025
Dec. 31, 2024
Mar. 31, 2024
Dec. 18, 2020
Debt Instrument [Line Items]                
Outstanding principal         $ 3,673      
Fair value of debt         1,584 $ 1,897    
Revolving credit facility | SOFR                
Debt Instrument [Line Items]                
Interest rate basis     SOFR          
4.75% Senior notes due 2028                
Debt Instrument [Line Items]                
Fair value of debt         557      
4.75% Senior notes due 2028 | GCI Liberty Inc                
Debt Instrument [Line Items]                
Outstanding principal               $ 600
Interest rate (as a percent)               4.75%
Aggregate unamortized premium         18      
Line of credit                
Debt Instrument [Line Items]                
Outstanding principal         454      
Line of credit | GCI, LLC                
Debt Instrument [Line Items]                
Amount available for borrowing         292      
Line of credit | Minimum | GCI, LLC                
Debt Instrument [Line Items]                
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage 0.30%   0.375%          
Line of credit | Maximum | GCI, LLC                
Debt Instrument [Line Items]                
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage 0.375%   0.50%          
Line of credit | Revolving credit facility | GCI, LLC                
Debt Instrument [Line Items]                
Outstanding principal         155      
Line of credit | Revolving credit facility | Alternate base rate | GCI, LLC                
Debt Instrument [Line Items]                
Interest rate basis alternate base rate              
Line of credit | Revolving credit facility | Alternate base rate | Minimum | GCI, LLC                
Debt Instrument [Line Items]                
Basis spread on variable rate 0.50%              
Line of credit | Revolving credit facility | Alternate base rate | Maximum | GCI, LLC                
Debt Instrument [Line Items]                
Basis spread on variable rate 1.25%              
Line of credit | Standby letters of credit | GCI, LLC                
Debt Instrument [Line Items]                
Outstanding principal         3      
Line of credit | Term loan A | GCI, LLC                
Debt Instrument [Line Items]                
Outstanding principal         $ 299      
Percentage of original principal amount 0.25%   0.25%          
Change in percentage of original principal amount 1.25%   1.25%          
Line of credit | Term loan A | SOFR | GCI, LLC                
Debt Instrument [Line Items]                
Interest rate basis SOFR   SOFR          
Line of credit | Term loan A | SOFR | Minimum | GCI, LLC                
Debt Instrument [Line Items]                
Basis spread on variable rate 2.00%   2.00%          
Line of credit | Term loan A | SOFR | Maximum | GCI, LLC                
Debt Instrument [Line Items]                
Basis spread on variable rate 2.75%   3.25%          
Line of credit | Term loan A | Alternate base rate | GCI, LLC                
Debt Instrument [Line Items]                
Interest rate basis alternate base rate   alternate base rate          
Line of credit | Term loan A | Alternate base rate | Minimum | GCI, LLC                
Debt Instrument [Line Items]                
Basis spread on variable rate 1.00%   1.00%          
Line of credit | Term loan A | Alternate base rate | Maximum | GCI, LLC                
Debt Instrument [Line Items]                
Basis spread on variable rate 1.75%   2.25%          
Senior credit facility | GCI, LLC                
Debt Instrument [Line Items]                
Number of days stipulated for springing maturity per the agreement 91 days              
Interest rate         6.20%   7.30%  
Senior credit facility | Minimum | GCI, LLC                
Debt Instrument [Line Items]                
First lien leverage ratio     4          
Senior credit facility | Maximum | GCI, LLC                
Debt Instrument [Line Items]                
First lien leverage ratio     1          
Revolving credit facility | GCI, LLC                
Debt Instrument [Line Items]                
Principal amount $ 450 $ 550            
Revolving credit facility | SOFR                
Debt Instrument [Line Items]                
Interest rate basis SOFR              
Revolving credit facility | SOFR | Minimum                
Debt Instrument [Line Items]                
Basis spread on variable rate 1.50%   1.50%          
Revolving credit facility | SOFR | Maximum                
Debt Instrument [Line Items]                
Basis spread on variable rate 2.25%   2.75%          
Revolving credit facility | Alternate base rate | GCI, LLC                
Debt Instrument [Line Items]                
Interest rate basis   alternate base rate            
Revolving credit facility | Alternate base rate | Minimum | GCI, LLC                
Debt Instrument [Line Items]                
Basis spread on variable rate   0.50%            
Revolving credit facility | Alternate base rate | Maximum | GCI, LLC                
Debt Instrument [Line Items]                
Basis spread on variable rate   1.75%            
Standby letters of credit | GCI, LLC                
Debt Instrument [Line Items]                
Principal amount $ 35 $ 25            
Term loan A | GCI, LLC                
Debt Instrument [Line Items]                
Principal amount $ 300 $ 250            
Number of days stipulated for springing maturity per the agreement 91 days              
Wells Fargo notes payable | GCI Liberty Inc                
Debt Instrument [Line Items]                
Outstanding principal         $ 4 $ 4    
Wells Fargo notes payable | GCI, LLC                
Debt Instrument [Line Items]                
Interest rate         6.10%   7.10%  
Wells Fargo notes payable | SOFR | GCI Liberty Inc                
Debt Instrument [Line Items]                
Interest rate basis       SOFR        
Basis spread on variable rate       1.75%