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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, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Segment Reporting Information [Line Items]
Net revenue	$ 2,058	$ 2,010	$ 6,234	$ 5,954
Adjusted OIBDA	417	415	1,305	1,317
QVC-U.S.
Segment Reporting Information [Line Items]
Net revenue	1,418	1,374	4,262	4,111
Adjusted OIBDA	324	316	1,005	1,013
QVC- International
Segment Reporting Information [Line Items]
Net revenue	640	636	1,972	1,843
Adjusted OIBDA	$ 93	$ 99	$ 300	$ 304

X

- Definition

Adjusted OIBDA during the reporting period. Adjusted OIBDA is defined as revenue less cost of sales, operating expenses, and selling, general and administrative expenses (excluding stock-based compensation).

+ References

No definition available.

+ Details

Name:	qvc_AdjustedOibda
Namespace Prefix:	qvc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=qvc_QvcUSMember
Namespace Prefix:
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Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=qvc_QVCInternationalMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: