Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Narrative) (Details)

v3.10.0.1
Stock-Based Compensation (Narrative) (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Stock-based compensation $ 21 $ 22 $ 67 $ 59
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate     0.00%  
Total unrecognized compensation cost related to unvested Liberty equity awards $ 87   $ 87  
Weighted average period of recognition related to unvested equity awards (in years)     2 years 6 months  
Common Class A        
Common Stock, Capital Shares Reserved for Future Issuance 31,700   31,700  
Options granted     4,697  
Common Class B        
Common Stock, Capital Shares Reserved for Future Issuance 1,800   1,800  
Options granted     175  
QVC Employees | Common Class A        
Options granted     2,924  
Weighted average grant-date fair value of options     $ 8.76  
Award vesting period     4 years  
zulily Employees | Common Class A        
Options granted     336  
Weighted average grant-date fair value of options     $ 8.65  
Award vesting period     4 years  
HSNi Employees | Common Class A        
Options granted     859  
Weighted average grant-date fair value of options     $ 8.77  
Award vesting period     4 years  
Qurate Retail President and CEO | Common Class A        
Options granted     577  
Weighted average grant-date fair value of options     $ 7.09  
Qurate Retail President and CEO | Common Class A | Awards subject to Fifty Percent Vesting        
Award Vesting Period Percentage     50.00%  
Board of Directors Chairman | Common Class B        
Options granted     175  
Weighted average grant-date fair value of options     $ 8.84  
Board of Directors Chairman | Common Class B | Restricted Stock        
Award vesting period     1 year  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period     124  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value $ 27.56   $ 27.56  
CEO | Common Class A | Restricted Stock        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period     183  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value $ 22.18   $ 22.18  
Liberty Ventures common stock | Board of Directors Chairman | Common Class B        
Options granted     143  
Weighted average grant-date fair value of options     $ 16.55