Information about QVC's Operating Segments (Depreciation/Amortization by Segment) (Details) - USD ($) $ in Millions  | 
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2020  | 
Dec. 31, 2019  | 
Dec. 31, 2018  | 
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| Segment Reporting Information [Line Items] | |||
| Depreciation | $ 171 | $ 186 | $ 174 | 
| Amortization | 282 | 282 | 237 | 
| QVC-International | |||
| Segment Reporting Information [Line Items] | |||
| Depreciation | 55 | 73 | 56 | 
| Amortization | 12 | 13 | 10 | 
| QxH [Member] | |||
| Segment Reporting Information [Line Items] | |||
| Depreciation | 116 | 113 | 118 | 
| Amortization | $ 270 | $ 269 | $ 227 | 
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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation. 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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