Annual report pursuant to Section 13 and 15(d)

Debt (Details)

v3.22.0.1
Debt (Details) - USD ($)
3 Months Ended 12 Months Ended
May 12, 2021
Dec. 18, 2020
Nov. 23, 2020
Oct. 15, 2020
Aug. 27, 2020
Aug. 12, 2020
Dec. 31, 2021
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2021
Oct. 15, 2021
Dec. 31, 2020
Revolving Credit Facility                        
Debt disclosures                        
Principal amount                     $ 550,000,000  
Revolving Credit Facility | LIBOR                        
Debt disclosures                        
Interest rate basis       LIBOR                
2.75% Exchangeable Senior Debentures due 2050                        
Debt disclosures                        
Carrying value             $ 585,000,000     $ 585,000,000   $ 609,000,000
Principal amount         $ 575,000,000              
Interest rate (as a percent)         2.75%   2.75%     2.75%    
Percentage of redemption and purchase price         100.00%              
2.75% Exchangeable Senior Debentures due 2050 | Charter. | Series A common stock                        
Debt disclosures                        
Shares attributable to debentures per $1,000 original principal amount of Debentures         1.1661              
Total shares attributable to debentures         670,507              
Debt instrument, face amount per debenture         $ 1,000              
Exchange price of shares attributable to debentures         $ 857.56              
Exchangeable Senior Debentures Option                        
Debt disclosures                        
Principal amount     $ 75,000,000   $ 75,000,000              
1.25% Exchangeable Senior Debentures due 2050                        
Debt disclosures                        
Carrying value             $ 818,000,000     $ 818,000,000   837,000,000
Principal amount     $ 825,000,000                  
Interest rate (as a percent)     1.25%       1.25%     1.25%    
Percentage of redemption and purchase price     100.00%                  
1.25% Exchangeable Senior Debentures due 2050 | Charter. | Series A common stock                        
Debt disclosures                        
Shares attributable to debentures per $1,000 original principal amount of Debentures     1.1111                  
Total shares attributable to debentures     916,657                  
Debt instrument, face amount per debenture     $ 1,000                  
Exchange price of shares attributable to debentures     $ 900.00                  
1.75% Exchangeable Senior Debentures due 2046                        
Debt disclosures                        
Carrying value             $ 25,000,000     $ 25,000,000   26,000,000
Interest rate (as a percent)             1.75%     1.75%    
1.75% Exchangeable Senior Debentures due 2046 | GCI Liberty Inc                        
Debt disclosures                        
Principal amount   $ 15,000,000                    
Fair value of debt   $ 26,000,000                    
Interest rate (as a percent)   1.75%         1.75%     1.75%    
Percentage of redemption and purchase price   100.00%                    
Exchange of debentures based on share price exceeds on par value                   130.00%    
Minimum number of days share price exceeds par value                   20 days    
Number of trading days                   30 days    
Exchange period                   1 year    
1.75% Exchangeable Senior Debentures due 2046 | Charter. | GCI Liberty Inc                        
Debt disclosures                        
Shares attributable to debentures per $1,000 original principal amount of Debentures   2.6989                    
Total shares attributable to debentures   39,231                    
Debt instrument, face amount per debenture   $ 1,000                    
Exchange price of shares attributable to debentures   $ 370.52                    
Line of credit                        
Debt disclosures                        
Carrying value             $ 399,000,000     $ 399,000,000   704,000,000
Standby Letters of Credit                        
Debt disclosures                        
Principal amount                     $ 25,000,000  
SPV | Margin Loan Facility                        
Debt disclosures                        
Borrowings   $ 1,300,000,000           $ 350,000,000 $ 125,000,000      
Carrying value             1,300,000,000     $ 1,300,000,000   $ 2,000,000,000
Number of business days prior to the maturity date                   5 days    
Remaining borrowing capacity             1,000,000,000.0     $ 1,000,000,000.0    
SPV | Margin Loan Facility | Charter.                        
Debt disclosures                        
Number of common shares pledged as collateral                   12,300,000    
Value of pledged collateral             8,000,000,000.0     $ 8,000,000,000.0    
SPV | Margin Loan Facility | Three-month LIBOR                        
Debt disclosures                        
Interest rate basis           three-month LIBOR            
Basis spread on variable rate 1.50% 1.85%       1.50%            
SPV | Term loan                        
Debt disclosures                        
Maximum borrowing capacity $ 1,150,000,000                      
Carrying value 1,150,000,000                      
SPV | Revolving Credit Facility                        
Debt disclosures                        
Maximum borrowing capacity 1,150,000,000                      
Amount outstanding 0.00                      
Repayment of debt 850,000,000           $ 200,000,000          
SPV | Uncommitted Incremental Term Loan Facility                        
Debt disclosures                        
Maximum borrowing capacity $ 200,000,000