Information about QVC's Operating Segments (Total Assets and Capital Expenditures by Segment) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Total assets	$ 14,107	$ 14,927
Capital expenditures	140
Property and equipment, net of accumulated depreciation of $1,491 at September 30, 2020 and $1,338 at December 31, 2019	1,162	$ 1,215
QxH [Member]
Segment Reporting Information [Line Items]
Total assets	11,813
Capital expenditures	121
Property and equipment, net of accumulated depreciation of $1,491 at September 30, 2020 and $1,338 at December 31, 2019	767
QVC-International
Segment Reporting Information [Line Items]
Total assets	2,294
Capital expenditures	19
Property and equipment, net of accumulated depreciation of $1,491 at September 30, 2020 and $1,338 at December 31, 2019	$ 395