Other income (Details) ¥ in Thousands, $ in Thousands	12 Months Ended
Dec. 31, 2017 CNY (¥)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 CNY (¥)	Dec. 31, 2015 CNY (¥)
Government grants	¥ 88,873		¥ 128,550	¥ 79,541
Others	24,314		954	2,759
Total	¥ 113,187	$ 17,397	¥ 129,504	¥ 82,300

The total amount of other operating income, the components of which are not separately disclosed on the income statement, from items that are associated with the entity's normal revenue producing operation.

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)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

+ Details

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Period Type:	duration

- Definition

Revenue earned during the period from non-repayable sum of money awarded to an entity to carry out a specific purpose as provided in grant agreements.

+ 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(e))
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

+ Details

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- Definition

The amount of other income which are not separately disclosed on the income statement.

+ References

No definition available.

+ Details

Name:	yy_OtherOperatingIncomeMiscellaneous
Namespace Prefix:	yy_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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