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Tracking Stock (Details) (USD $)
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0 Months Ended | |||||||||||||||||
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Sep. 30, 2014
item
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Dec. 31, 2013
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Sep. 30, 2013
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Dec. 31, 2012
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Sep. 30, 2014
Interactive Group
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Dec. 31, 2013
Interactive Group
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Sep. 30, 2013
Interactive Group
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Dec. 31, 2012
Interactive Group
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Sep. 30, 2014
Interactive Group
HSN, Inc.
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Oct. 10, 2013
Interactive Group
HSN, Inc.
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Oct. 03, 2014
Interactive Group
Reattribution Transaction
Ventures Group
Subsequent Event [Member]
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Oct. 03, 2014
Interactive Group
QVC Bank Credit Facilities
Subsequent Event [Member]
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Sep. 30, 2014
Ventures Group
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Dec. 31, 2013
Ventures Group
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Sep. 30, 2013
Ventures Group
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Dec. 31, 2012
Ventures Group
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Oct. 03, 2014
Ventures Group
Common Class A
Subsequent Event [Member]
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Oct. 03, 2014
Ventures Group
Reattribution Transaction
Subsequent Event [Member]
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| Targeted or Tracking Stock, Stock [Line Items] | ||||||||||||||||||
| Number of tracking stocks | 2 | |||||||||||||||||
| Cash and cash equivalents | $ 1,606,000,000 | $ 902,000,000 | $ 700,000,000 | $ 2,291,000,000 | $ 733,000,000 | $ 595,000,000 | $ 450,000,000 | $ 698,000,000 | $ 873,000,000 | $ 307,000,000 | $ 250,000,000 | $ 1,593,000,000 | ||||||
| Reattributed Assets transferred, excluding cash | 1,500,000,000 | |||||||||||||||||
| Total cash reattributed | 1,000,000,000 | |||||||||||||||||
| Cash reattributed as part of Reattributed Assets | 970,000,000 | |||||||||||||||||
| Cash reattributed outside of Reattributed Assets | 30,000,000 | |||||||||||||||||
| Ratio applied to the reattribution | 0.14217 | |||||||||||||||||
| Total fair value of Reattributed Assets | 2,470,000,000 | |||||||||||||||||
| Average of the high and low sales prices of stock | $ 36.50 | |||||||||||||||||
| Number of shares issuable in connection with asset reattribution | 67,671,232 | |||||||||||||||||
| Equity Method Investment, Ownership Percentage | 38.00% | 38.00% | ||||||||||||||||
| Line of Credit Facility, Amount Outstanding | $ 1,060,000,000 | |||||||||||||||||