Basis of Presentation (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | |||
|---|---|---|---|---|---|
Jan. 01, 2018 |
Sep. 30, 2017 |
Sep. 30, 2016 |
Sep. 30, 2017 |
Sep. 30, 2016 |
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| ÎçҹѰ»¨ Interactive Corporation Starz Tripco ÎçҹѰ»¨ Broadband CommerceHub Expedia Holdings | Ìý | Ìý | Ìý | Ìý | Ìý |
| Entity Information [Line Items] | Ìý | Ìý | Ìý | Ìý | Ìý |
| Related Party Transaction, Amounts of Transaction | Ìý | $ 6 | $ 5 | $ 17 | $ 16 |
| Maximum | Accounting Standards Update 2014-09 | Ìý | Ìý | Ìý | Ìý | Ìý |
| Entity Information [Line Items] | Ìý | Ìý | Ìý | Ìý | Ìý |
| Increase Decrease In Subscriber Revenue percent | 3.00% | Ìý | Ìý | Ìý | Ìý |
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Increase (Decrease) In Subscriber Revenue, Percent No definition available.
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- Definition Amount of transactions with related party during the financial reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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