Quarterly report pursuant to Section 13 or 15(d)

Debt (Details)

v3.20.2
Debt (Details) - USD ($)
9 Months Ended
Aug. 31, 2020
Aug. 27, 2020
Aug. 12, 2020
Jul. 31, 2020
Sep. 30, 2020
Dec. 31, 2019
Debt disclosures            
Outstanding borrowings         $ 1,318,664,000 $ 572,944,000
Charter            
Debt disclosures            
Outstanding borrowings         $ 77,947,000,000 75,578,000,000
Margin Loan Facility | Charter            
Debt disclosures            
Number of common shares pledged as collateral         6,800,000  
Value of pledged collateral         $ 4,200,000,000  
Exchangeable Senior Debentures            
Debt disclosures            
Principal amount   $ 575,000,000        
Interest rate (as a percent)   2.75%        
Percentage of redemption and purchase price   100.00%        
Outstanding borrowings         621,000,000  
Exchangeable Senior Debentures | 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        
SPV | Margin Loan Facility            
Debt disclosures            
Maximum borrowing capacity including incremental facility     $ 2,300,000,000      
Maximum borrowing capacity     1,000,000,000.0      
Additional allowed borrowing capacity     $ 1,300,000,000      
Borrowings $ 100,000,000     $ 25,000,000    
Outstanding borrowings         700,000,000 $ 575,000,000
Remaining borrowing capacity         $ 300,000,000  
Debt Instrument, Interest Rate, Effective Percentage         1.72%  
SPV | Margin Loan Facility | Three-month LIBOR            
Debt disclosures            
Interest rate basis     three-month LIBOR      
Basis spread on variable rate     1.50%      
SPV | Margin Loan Facility | Three-month LIBOR | GCI Liberty            
Debt disclosures            
Basis spread on variable rate     1.85%