Annual report pursuant to Section 13 and 15(d)

Stock Options and Other Share-Based Awards Stock Options and Other Share- Based Awards (Narrative) (Details)

v3.20.4
Stock Options and Other Share-Based Awards Stock Options and Other Share- Based Awards (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based compensation $ 37 $ 39 $ 46
Special Dividend      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based compensation $ 4    
Unrecognized compensation cost, period for recognition 3 years 1 month 6 days    
Share-based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount $ 6    
Liberty Incentive Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Unrecognized compensation cost related to options $ 15    
Unrecognized compensation cost, period for recognition 2 years 1 month 6 days    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value $ 7 16 37
Liberty Incentive Plan | Stock options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based compensation 17 22 28
Liberty Incentive Plan | Restricted Stock [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based compensation $ 16 $ 17 $ 18
Unrecognized compensation cost, period for recognition 2 years 7 months 6 days    
Share-based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount $ 33    
Liberty Incentive Plan | QRTEA      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Granted (in dollars per share) $ 4.51 $ 16.83 $ 26.23
HSN, Inc.      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Ownership Percentage by Parent     100.00%