Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation (Details)

v3.10.0.1
Basis of Presentation (Details)
shares in Millions, $ in Millions
3 Months Ended 6 Months Ended
Dec. 29, 2017
shares
Jun. 30, 2018
USD ($)
Jun. 30, 2017
USD ($)
Jun. 30, 2018
USD ($)
Jun. 30, 2017
USD ($)
Mar. 09, 2018
item
Number of tracking stocks | item           2
Additional Paid-In Capital            
Reclassification       $ 3,785    
Liberty Ventures common stock | Common Class A            
Share exchange ratio           1
Liberty Ventures common stock | Common Class B            
Share exchange ratio           1
HSNi            
Business Acquisition, Percentage of Voting Interests Acquired 62.00%          
HSNi | QVC Group            
Business Acquisition Equity Interests Issued or Issuable Number Of Shares Issued Per Shares Acquired 1.65          
HSNi | QVC Group | Common Class A            
Stock Issued During Period Shares Acquisitions] | shares 53.6          
LMC            
Related Party Transaction, Amounts of Transaction   $ 2 $ 3 $ 4 $ 5