Goodwill and Other Intangible Assets, Net Goodwill (Details) - USD ($) $ in Millions  | 
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2020  | 
Dec. 31, 2019  | 
Dec. 31, 2018  | 
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| Goodwill [Line Items] | |||
| Goodwill (note 6) | $ 6,034 | $ 5,971 | $ 5,972 | 
| Goodwill, Foreign Currency Translation Gain (Loss) | 63 | (1) | |
| QxH [Member] | |||
| Goodwill [Line Items] | |||
| Goodwill (note 6) | 5,112 | 5,112 | 5,112 | 
| Goodwill, Foreign Currency Translation Gain (Loss) | 0 | 0 | |
| QVC-International | |||
| Goodwill [Line Items] | |||
| Goodwill (note 6) | 922 | 859 | $ 860 | 
| Goodwill, Foreign Currency Translation Gain (Loss) | $ 63 | $ (1) | |
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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- Definition Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- 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. No definition available. 
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