Quarterly report pursuant to Section 13 or 15(d)

Assets and Liabilities Measured at Fair Value - Assets And Liabilities Measured At Fair Value On A Recurring Basis (Details)

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Assets and Liabilities Measured at Fair Value - Assets And Liabilities Measured At Fair Value On A Recurring Basis (Details) - USD ($)
$ in Millions
 9 Months Ended
Sep. 30, 2023
Oct. 01, 2023
Dec. 31, 2022
Assets and liabilities measured at fair value      
Indemnification payment from liberty broadband $ 26    
Recurring      
Assets and liabilities measured at fair value      
Cash equivalents 823   $ 938
Indemnification asset 21   50
Debt 307   614
Recurring | Fair Value, Inputs, Level 1      
Assets and liabilities measured at fair value      
Cash equivalents 823   938
Recurring | Significant Other Observable Inputs (Level 2)      
Assets and liabilities measured at fair value      
Indemnification asset 21   50
Debt $ 307   $ 614
1.75% Exchangeable Senior Debentures due 2046      
Assets and liabilities measured at fair value      
Interest rate (as a percent) 1.75%    
Indemnification payment from liberty broadband $ 26    
Debt exchanged $ 253    
Subsequent Event | 1.75% Exchangeable Senior Debentures due 2046      
Assets and liabilities measured at fair value      
Interest rate (as a percent)   1.75%