Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Disaggregation of Revenue (Details)

v3.22.0.1
Summary of Significant Accounting Policies - Disaggregation of Revenue (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Disaggregation of Revenue [Line Items]      
Revenue $ 988 $ 51 $ 15
GCI Holdings      
Disaggregation of Revenue [Line Items]      
Revenue 970 34  
GCI Holdings | Lease, grant, and revenue from subsidies      
Disaggregation of Revenue [Line Items]      
Revenue 77 3  
GCI Holdings | Consumer Revenue | Wireless      
Disaggregation of Revenue [Line Items]      
Revenue 134 5  
GCI Holdings | Consumer Revenue | Data      
Disaggregation of Revenue [Line Items]      
Revenue 214 7  
GCI Holdings | Consumer Revenue | Video      
Disaggregation of Revenue [Line Items]      
Revenue 71 3  
GCI Holdings | Consumer Revenue | Voice      
Disaggregation of Revenue [Line Items]      
Revenue 15    
GCI Holdings | Business Revenue | Wireless      
Disaggregation of Revenue [Line Items]      
Revenue 68 3  
GCI Holdings | Business Revenue | Data      
Disaggregation of Revenue [Line Items]      
Revenue 364 12  
GCI Holdings | Business Revenue | Video      
Disaggregation of Revenue [Line Items]      
Revenue 3    
GCI Holdings | Business Revenue | Voice      
Disaggregation of Revenue [Line Items]      
Revenue 24 1  
Corporate and other      
Disaggregation of Revenue [Line Items]      
Revenue $ 18 $ 17 $ 15