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Share-based compensation (Huya's share-based awards - Narrative) (Details) - shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Huya 2017 Share Incentive Plan [Member] | Employees [Member]
Share-based compensation [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	5,918,353	11,737,705
Huya 2017 Share Incentive Plan [Member] | Non Employee [Member]
Share-based compensation [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	220,000
Share based Compensation Arrangements By Share Based Payments Awards Options Grants in the Period Non Employees	220,000
Maximum [Member]
Share-based compensation [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	28,394,117	17,647,058

X

- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(1)
-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901

+ Details

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- Definition

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+ References

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- Definition

Gross number of share options (or share units) granted during the period.

+ References

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- Definition

Gross number of share options (or share units) granted during the period to Non Employee.

+ References

No definition available.

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