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REVENUES (Details) ¥ in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2015 USD ($) | Dec. 31, 2015 CNY (¥) | Dec. 31, 2014 CNY (¥) | Dec. 31, 2013 CNY (¥)
REVENUES. |  |  |  |  |
Online marketing services |  | $ 500,807 | ¥ 3,244,130 | ¥ 1,322,612 | ¥ 612,565
Internet value-added services |  | 61,026 | 395,312 | 400,671 | 83,155
Internet security services and others |  | 6,945 | 44,987 | 40,296 | 54,191
Total | [1] | $ 568,778 | ¥ 3,684,429 | ¥ 1,763,579 | ¥ 749,911
[1] | The amount of transactions with related parties recorded in revenue, cost of revenues and operating income (expenses) are as follows: year ended December 31, 201320142015 RMBRMBRMBUS$ Revenues 111,218 86,708 321,881 49,690Cost of revenues (9,296) (4,767) (31,316) (4,834)Research and development (4,174) (4,212) (4,500) (695)Selling and marketing (256) (27,931) (108,422) (16,737)General and administrative (2,021) (5,158) (5,072) (783)Details of the related party transactions are set out in note 16 (b) to the consolidated financial statements.

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- Definition Aggregate revenue during the period from internet security services and other services which are not separately disclosed , after deducting allowances and discounts. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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- Definition Aggregate revenue during the period from online marketing service which includes, after deducting allowances and discounts. + References No definition available. + Details
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Namespace Prefix: | cmcm_
Data Type: | xbrli:monetaryItemType
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- Definition Aggregate revenue during the period from internet value-added services, after deducting allowances and discounts. + References No definition available. + Details
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Namespace Prefix: | cmcm_
Data Type: | xbrli:monetaryItemType
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- References No definition available. + Details
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- Definition Aggregate revenue during the period from services rendered in the normal course of business, after deducting allowances and discounts. + References 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 210.5-03.1(d)) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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