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Basis of Presentation (Details) - USD ($) | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017 | Dec. 29, 2017 | Jun. 23, 2016
General business information |  |  |  |  |  |
Dividends paid to noncontrolling interest |  |  | $ 23,000,000 | $ 22,000,000 |  |
Line of credit facility, maximum borrowing capacity |  |  |  |  |  | $ 2,650,000,000
Transaction related costs | $ 28,000,000 | $ 3,000,000 | 32,000,000 | 3,000,000 |  |
zulily, llc [Member] |  |  |  |  |  |
General business information |  |  |  |  |  |
Related party transaction, amounts of transaction |  |  | $ 8,000,000 | $ 7,000,000 |  |
QVC-Japan |  |  |  |  |  |
General business information |  |  |  |  |  |
Investment owned, percent of net assets | 60.00% |  | 60.00% |  |  |
Noncontrolling interest, ownership percentage by noncontrolling owners | 40.00% |  | 40.00% |  |  |
CNR Home Shopping Co., Ltd. |  |  |  |  |  |
General business information |  |  |  |  |  |
Equity method investment, ownership percentage | 49.00% |  | 49.00% |  |  |
HSN, Inc. [Member] |  |  |  |  |  |
General business information |  |  |  |  |  |
Related party transaction, amounts of transaction |  |  | $ 28,000,000 |  |  |
Remaining ownership interest acquired by parent |  |  |  |  | 62.00% |
Revolving Credit Facility | QVC |  |  |  |  |  |
General business information |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity |  |  |  |  |  | 2,250,000,000
Revolving Credit Facility | Tranche One, Shared with Related Party |  |  |  |  |  |
General business information |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity |  |  |  |  |  | $ 400,000,000
Line of credit facility, fair value of amount outstanding | $ 150,000,000 |  | $ 150,000,000 |  |  |

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