Investments In Affiliates Accounted For Using The Equity Method (Summary of Carrying Amount and Percentage Ownership of Significant Investments in Affiliates) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Equity Method Investments and Operating Activities Segment [Line Items]
Carrying amount	$ 1,545	$ 1,641
Expedia
Equity Method Investments and Operating Activities Segment [Line Items]
Percentage ownership	16.00%
QVC Group Common Stock
Equity Method Investments and Operating Activities Segment [Line Items]
Carrying amount	$ 226	208
QVC Group Common Stock \| HSN, Inc.
Equity Method Investments and Operating Activities Segment [Line Items]
Percentage ownership	38.00%
Carrying amount	$ 184	165
QVC Group Common Stock \| Other
Equity Method Investments and Operating Activities Segment [Line Items]
Carrying amount	42	43
Liberty Ventures common stock
Equity Method Investments and Operating Activities Segment [Line Items]
Carrying amount	1,319	1,433
Liberty Ventures common stock \| Other
Equity Method Investments and Operating Activities Segment [Line Items]
Carrying amount	$ 146	239
Liberty Ventures common stock \| Expedia
Equity Method Investments and Operating Activities Segment [Line Items]
Percentage ownership	16.00%
Carrying amount	$ 922	927
Liberty Ventures common stock \| FTD
Equity Method Investments and Operating Activities Segment [Line Items]
Percentage ownership	37.00%
Carrying amount	$ 251	$ 267
Fair Value, Inputs (Level 1) \| QVC Group Common Stock \| HSN, Inc.
Equity Method Investments and Operating Activities Segment [Line Items]
Market value	797
Fair Value, Inputs (Level 1) \| Liberty Ventures common stock \| Expedia
Equity Method Investments and Operating Activities Segment [Line Items]
Market value	2,755
Fair Value, Inputs (Level 1) \| Liberty Ventures common stock \| FTD
Equity Method Investments and Operating Activities Segment [Line Items]
Market value	$ 210

Equity Method Investments and Operating Activities Segment [Line Items]

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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66011266&loc=d3e33918-111571

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- Definition

This item represents the aggregate value of each identified investment accounted for under the equity method of accounting based on the quoted market price for those investments in common stock for which a quoted market price is available.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=66011266&loc=d3e33918-111571

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- Definition

This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=66022249&loc=d3e33749-111570

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.12)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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