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Quarterly report pursuant to Section 13 or 15(d)

Investments In Affiliates Accounted For Using The Equity Method (Summary of Share Earnings (Losses) of Affiliates) (Details)

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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] Ìý Ìý Ìý
Share of earnings (losses) of affiliates, net (note 9) $ (14) $ (27) Ìý
HSNi Ìý Ìý Ìý
Schedule of Equity Method Investments [Line Items] Ìý Ìý Ìý
Share of earnings (losses) of affiliates, net (note 9) Ìý 16 Ìý
FTD Ìý Ìý Ìý
Schedule of Equity Method Investments [Line Items] Ìý Ìý Ìý
Share of earnings (losses) of affiliates, net (note 9) (8) (5) Ìý
LendingTree Ìý Ìý Ìý
Schedule of Equity Method Investments [Line Items] Ìý Ìý Ìý
Share of earnings (losses) of affiliates, net (note 9) Ìý 2 Ìý
Other Ìý Ìý Ìý
Schedule of Equity Method Investments [Line Items] Ìý Ìý Ìý
Share of earnings (losses) of affiliates, net (note 9) $ (6) $ (40) Ìý
HSNi Ìý Ìý Ìý
Schedule of Equity Method Investments [Line Items] Ìý Ìý Ìý
Business Acquisition, Percentage of Voting Interests Acquired Ìý Ìý 62.00%