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Related Party Transactions (Tables) | 12 Months Ended
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Dec. 31, 2017
Related Party Transactions [Abstract] |
Amounts due from/due to related parties | As of December 31, 2016 and 2017, amounts due from/due to related parties were as follows:
|  | As of December 31, |
|  | 2016 |  |  | 2017 |  |  | 2017 |
|  | RMB |  |  | RMB |  |  | US$ |
|  | (In millions) |
Amounts due from related parties, current: |  |  |  |  |  |  |  |  |  |  |  |
Qunar (i) |  |  | 25 |  |  |  | 35 |  |  |  | 5 |
Ctrip (i) |  |  | 287 |  |  |  | 102 |  |  |  | 16 |
Other related parties (i) |  |  | 34 |  |  |  | 31 |  |  |  | 5 |
Total |  |  | 346 |  |  |  | 168 |  |  |  | 26 |
Amounts due from related parties, non-current: |  |  |  |  |  |  |  |  |  |  |  |
Other related parties (ii) |  |  | 11 |  |  |  | 9 |  |  |  | 1 |
Amounts due to related parties, current: |  |  |  |  |  |  |  |  |  |  |  |
Qunar (iii) |  |  | 275 |  |  |  | 23 |  |  |  | 4 |
Ctrip (iii) |  |  | 125 |  |  |  | 99 |  |  |  | 15 |
Other related parties (iii) |  |  | 59 |  |  |  | 31 |  |  |  | 5 |
Total |  |  | 459 |  |  |  | 153 |  |  |  | 24 |
(i) | The balances mainly represent amounts arising from services the Company provided to its equity method investees in the ordinary course of business.
(ii) | The balances mainly represent rental deposits paid in advance to the related party of one of the executive officers. Pursuant to the rental agreements, certain subsidiaries of the Company rent an office building owned by the family members of the executive officer.
(iii) | The balances mainly represent amounts arising from services provided by the Company’s equity method investees and cost method investees in the ordinary course of business.

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- Definition Tabular disclosure of related party transactions. Examples of related party transactions include, but are not limited to, transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners and (d) affiliates. + References No definition available. + Details
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