Annual report [Section 13 and 15(d), not S-K Item 405]

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

v3.25.0.1
Summary of Significant Accounting Policies - Disaggregation of Revenue (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Disaggregation of Revenue [Line Items]      
Revenue $ 1,016 $ 981 $ 975
GCI Holdings      
Disaggregation of Revenue [Line Items]      
Revenue 1,016 981 969
GCI Holdings | Lease, grant, and revenue from subsidies      
Disaggregation of Revenue [Line Items]      
Revenue 76 77 77
GCI Holdings | Consumer revenue | Data      
Disaggregation of Revenue [Line Items]      
Revenue 238 233 231
GCI Holdings | Consumer revenue | Wireless      
Disaggregation of Revenue [Line Items]      
Revenue 141 143 143
GCI Holdings | Consumer revenue | Other revenue      
Disaggregation of Revenue [Line Items]      
Revenue 41 41 55
GCI Holdings | Business revenue | Data      
Disaggregation of Revenue [Line Items]      
Revenue 465 424 392
GCI Holdings | Business revenue | Wireless      
Disaggregation of Revenue [Line Items]      
Revenue 41 45 47
GCI Holdings | Business revenue | Other revenue      
Disaggregation of Revenue [Line Items]      
Revenue $ 14 $ 18 24
Corporate and other      
Disaggregation of Revenue [Line Items]      
Revenue     $ 6