Annual report pursuant to Section 13 and 15(d)

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

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Summary of Significant Accounting Policies - Disaggregation of Revenue (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Disaggregation of Revenue [Line Items]      
Revenue $ 975 $ 988 $ 51
GCI Holdings      
Disaggregation of Revenue [Line Items]      
Revenue 969 970 34
GCI Holdings | Lease, grant, and revenue from subsidies      
Disaggregation of Revenue [Line Items]      
Revenue 77 77 3
GCI Holdings | Consumer Revenue | Data      
Disaggregation of Revenue [Line Items]      
Revenue 231 214 7
GCI Holdings | Consumer Revenue | Wireless      
Disaggregation of Revenue [Line Items]      
Revenue 143 134 5
GCI Holdings | Consumer Revenue | Other Revenue      
Disaggregation of Revenue [Line Items]      
Revenue 55 86 3
GCI Holdings | Business Revenue | Data      
Disaggregation of Revenue [Line Items]      
Revenue 392 364 12
GCI Holdings | Business Revenue | Wireless      
Disaggregation of Revenue [Line Items]      
Revenue 47 68 3
GCI Holdings | Business Revenue | Other Revenue      
Disaggregation of Revenue [Line Items]      
Revenue 24 27 1
Corporate and other      
Disaggregation of Revenue [Line Items]      
Revenue $ 6 $ 18 $ 17