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Basis of Presentation (Details) - USD ($) $ in Millions | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2018 | Mar. 31, 2017 | Dec. 29, 2017 | Jun. 23, 2016
General business information |  |  |  |
Dividends paid to noncontrolling interest | $ 23 | $ 22 |  |
Line of credit facility, maximum borrowing capacity |  |  |  | $ 2,650
QVC-Japan |  |  |  |
General business information |  |  |  |
Investment Owned, Percent of Net Assets | 60.00% |  |  |
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners | 40.00% |  |  |
CNR Home Shopping Co., Ltd. |  |  |  |
General business information |  |  |  |
Equity Method Investment, Ownership Percentage | 49.00% |  |  |
zulily, llc [Member] |  |  |  |
General business information |  |  |  |
Related Party Transaction, Amounts of Transaction | $ 3 | $ 2 |  |
HSN, Inc. [Member] |  |  |  |
General business information |  |  |  |
Related Party Transaction, Amounts of Transaction | 5 |  |  |
Remaining ownership interest acquired by parent |  |  | 62.00% |
Senior secured credit facility | QVC |  |  |  |
General business information |  |  |  |
Line of credit facility, maximum borrowing capacity |  |  |  | 2,250
Senior secured credit facility | Tranche One, Shared with Related Party |  |  |  |
General business information |  |  |  |
Line of credit facility, maximum borrowing capacity |  |  |  | $ 400
Line of Credit Facility, Fair Value of Amount Outstanding | $ 0 |  |  |

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