Basis of Presentation (Details) |
12 Months Ended |
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Dec. 31, 2017
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| Basis of Presentation | |
| Number of average monthly unique users | 455,000,000 |
| Number of markets have localized versions of the website | 48 |
| Number of languages for the website | 28 |
| Number of travel brands | 20 |
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- Definition Number of average monthly unique users No definition available.
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- Definition Represents the number of marketing brands the entity controls. No definition available.
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- Definition The number of languages the website has available. No definition available.
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- Definition The number of markets in which the entity's website has a localized version. No definition available.
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- References No definition available.
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