Quarterly report pursuant to Section 13 or 15(d)

Stock Based Compensation - TripCo Outstanding Awards (Details)

v3.8.0.1
Stock Based Compensation - TripCo Outstanding Awards (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Stock-Based Compensation    
Dividend rate 0.00%  
Liberty Incentive Plans | Series A    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]    
Options outstanding 681,000  
Granted 0  
Cancelled or expired (149,000)  
Options outstanding 532,000  
Options exercisable 423,000  
WAEP    
Weighted average exercise price, options outstanding (in dollars per share) $ 14.68  
Weighted average exercise price, options forfeited/cancelled (in dollars per share) 14.12  
Weighted average exercise price, options outstanding (in dollars per share) 14.83  
Weighted average exercise price, options exercisable (in dollars per share) $ 16.12  
Weighted average remaining contractual term outstanding 3 years 1 month 6 days  
Weighted average remaining contractual term exercisable 2 years 2 months 12 days  
2014 Plan    
Additional disclosures    
Unvested value not yet recognized $ 9  
Weighted average period the unrecognized compensation cost will be recognized 1 year 6 months  
Common Stock, Capital Shares Reserved for Future Issuance 2,300,000  
Stock Options | 2011 Plan | Trip Advisor    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]    
Options outstanding 6,853,000  
Granted 611,000  
Exercised (196,000)  
Cancelled or expired (72,000)  
Options outstanding 7,196,000  
Options exercisable 3,428,000  
WAEP    
Weighted average exercise price, options outstanding (in dollars per share) $ 52.78  
Weighted average exercise price, options granted (in dollars per share) 41.54  
Weighted average exercise price, options exercised (in dollars per share) 28.21  
Weighted average exercise price, options forfeited/cancelled (in dollars per share) 47.80  
Weighted average exercise price, options outstanding (in dollars per share) 52.48  
Weighted average exercise price, options exercisable (in dollars per share) $ 54.81  
Weighted average remaining contractual term outstanding 6 years 8 months 12 days  
Weighted average remaining contractual term exercisable 4 years 8 months 12 days  
Outstanding, aggregate intrinsic value $ 10  
Exercisable, aggregate intrinsic value $ 5  
Additional disclosures    
Weighted average period the unrecognized compensation cost will be recognized 3 years  
Unrecognized compensation cost, unvested options (in dollars) $ 55  
Weighted average grant date fair value, options (in dollars per share) $ 17.60  
Stock options exercised intrinsic value $ 3 $ 7
Restricted Stock Units (RSUs) | 2011 Plan | Trip Advisor    
Additional disclosures    
Weighted average period the unrecognized compensation cost will be recognized 3 years 2 months 12 days  
RSUs granted (in shares) 2,661,000  
Weighted average grant date fair value, granted during period RSUs (in dollars per share) $ 41.92  
Unrecognized compensation cost, unvested RSUs $ 312