Annual report pursuant to Section 13 and 15(d)

Long-Term Debt (Debt Securities That Are Not Reported At Fair Value) (Details)

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Long-Term Debt (Debt Securities That Are Not Reported At Fair Value) (Details) - USD ($)
$ in Millions
Dec. 31, 2017
Dec. 31, 2016
Debt Instrument [Line Items]    
2016 $ 24  
2017 425  
2018 23  
2019 1,786  
2020 980  
Long-term Debt, Fair Value 868 $ 805
Senior Debentures    
Debt Instrument [Line Items]    
Long-term Debt, Fair Value 866 853
QVC Senior Secured Notes    
Debt Instrument [Line Items]    
Long-term Debt, Fair Value $ 3,636 $ 3,496