Quarterly report pursuant to Section 13 or 15(d)

Information about QVC's Operating Segments (Total Assets and Capital Expenditures by Segment) (Details)

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Information about QVC's Operating Segments (Total Assets and Capital Expenditures by Segment) (Details) - USD ($)
$ in Millions
 9 Months Ended 12 Months Ended
Sep. 30, 2018
Dec. 31, 2017
Segment Reporting Information [Line Items]    
Total assets $ 11,420 $ 11,550
Capital expenditures 125 152
QVC-U.S.    
Segment Reporting Information [Line Items]    
Total assets 9,284 9,429
Capital expenditures 83 116
QVC- International    
Segment Reporting Information [Line Items]    
Total assets 2,136 2,121
Capital expenditures $ 42 $ 36