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Information about QVC's Operating Segments (Revenue and Adjusted OIBDA by Segment) (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Segment Reporting Information [Line Items]        
Adjusted OIBDA Excluding Transaction Related Costs $ 440 $ 512 $ 1,467 $ 1,409
Revenues 2,512 2,703 8,002 7,853
QxH [Member]        
Segment Reporting Information [Line Items]        
Adjusted OIBDA Excluding Transaction Related Costs 325 380 1,065 1,061
Revenues 1,813 1,980 5,738 5,782
QVC-International        
Segment Reporting Information [Line Items]        
Adjusted OIBDA Excluding Transaction Related Costs 115 132 402 348
Revenues $ 699 $ 723 $ 2,264 $ 2,071