This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(12))
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04(10))
-URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585

Reference 4: 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 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04(13)(f))
-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Investments In Affiliates Accounted For Using The Equity Method (Summary of Share Earnings (Losses) of Affiliates) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 29, 2017
Schedule of Equity Method Investments [Line Items]
Share of earnings (losses) of affiliates, net (note 9)	$ (14)	$ (27)
HSNi
Schedule of Equity Method Investments [Line Items]
Share of earnings (losses) of affiliates, net (note 9)		16
FTD
Schedule of Equity Method Investments [Line Items]
Share of earnings (losses) of affiliates, net (note 9)	(8)	(5)
LendingTree
Schedule of Equity Method Investments [Line Items]
Share of earnings (losses) of affiliates, net (note 9)		2
Other
Schedule of Equity Method Investments [Line Items]
Share of earnings (losses) of affiliates, net (note 9)	$ (6)	$ (40)
HSNi
Schedule of Equity Method Investments [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired			62.00%