Quarterly report pursuant to Section 13 or 15(d)

Debt - Senior Notes and Senior Credit Facility (Details)

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Debt - Senior Notes and Senior Credit Facility (Details) - USD ($)
$ in Millions
Jun. 12, 2023
May 01, 2023
Dec. 18, 2020
Mar. 31, 2024
Dec. 31, 2023
Oct. 15, 2021
Debt Instrument [Line Items]            
Outstanding principal       $ 3,684    
Fair value of debt       1,200 $ 1,255  
Revolving Credit Facility | SOFR            
Debt Instrument [Line Items]            
Interest rate basis SOFR          
Term Loan A | GCI, LLC            
Debt Instrument [Line Items]            
Principal amount           $ 250
Senior Notes            
Debt Instrument [Line Items]            
Fair value of debt       551    
Senior Notes | GCI Liberty Inc            
Debt Instrument [Line Items]            
Outstanding principal     $ 600      
Interest rate (as a percent)     4.75%      
Aggregate unamortized premium       22    
Line of credit            
Debt Instrument [Line Items]            
Outstanding principal       334    
Line of credit | GCI, LLC            
Debt Instrument [Line Items]            
Amount available for borrowing       457    
Line of credit | Minimum | GCI, LLC            
Debt Instrument [Line Items]            
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage 0.375%          
Line of credit | Maximum | GCI, LLC            
Debt Instrument [Line Items]            
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage 0.50%          
Line of credit | Revolving Credit Facility | GCI, LLC            
Debt Instrument [Line Items]            
Outstanding principal       90    
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 1.75%          
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       244    
Percentage of original principal amount 0.25%          
Change in percentage of original principal amount 1.25%          
Line of credit | Term Loan A | SOFR | GCI, LLC            
Debt Instrument [Line Items]            
Interest rate basis SOFR          
Line of credit | Term Loan A | SOFR | Minimum | GCI, LLC            
Debt Instrument [Line Items]            
Basis spread on variable rate 2.00%          
Line of credit | Term Loan A | SOFR | Maximum | GCI, LLC            
Debt Instrument [Line Items]            
Basis spread on variable rate 3.25%          
Line of credit | Term Loan A | Alternate base rate | GCI, LLC            
Debt Instrument [Line Items]            
Interest rate basis 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%          
Line of credit | Term Loan A | Alternate base rate | Maximum | GCI, LLC            
Debt Instrument [Line Items]            
Basis spread on variable rate 2.25%          
Senior Credit Facility | GCI, LLC            
Debt Instrument [Line Items]            
First lien leverage ratio 4.00          
Revolving Credit Facility | GCI, LLC            
Debt Instrument [Line Items]            
Principal amount           550
Revolving Credit Facility | SOFR | Minimum            
Debt Instrument [Line Items]            
Basis spread on variable rate 1.50%          
Revolving Credit Facility | SOFR | Maximum            
Debt Instrument [Line Items]            
Basis spread on variable rate 2.75%          
Standby Letters of Credit | GCI, LLC            
Debt Instrument [Line Items]            
Principal amount           $ 25
Wells Fargo Notes Payable | GCI Liberty Inc            
Debt Instrument [Line Items]            
Outstanding principal       $ 5 $ 5  
Wells Fargo Notes Payable | SOFR | GCI Liberty Inc            
Debt Instrument [Line Items]            
Interest rate basis   SOFR        
Basis spread on variable rate   1.75%        
Wells Fargo Notes Payable | LIBOR | GCI Liberty Inc            
Debt Instrument [Line Items]            
Interest rate basis     LIBOR      
Basis spread on variable rate     2.25%