Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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- Definition

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ 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 (i)
-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901

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- Definition

Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation.

+ References

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- 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
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-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
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-Paragraph 2
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- Definition

The annual increase on the first day of each fiscal year in maximum aggregate number of shares which may be issued pursuant to all awards under the Plan.

+ References

No definition available.

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Share-based compensation (Restricted Share Units - Narrative) (Details) - CNY (¥) ¥ in Thousands	1 Months Ended	12 Months Ended
	Oct. 31, 2012	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Sep. 16, 2011
Share-based compensation [Line Items]
Shares approved for grants to qualified persons					43,000,000
Annual increase on the first day of each fiscal year, beginning from 2013 in maximum aggregate number of shares which may be issued pursuant to all awards under the Plan	20,000,000
2011 Incentive Scheme [Member] \| Restricted share units [Member]
Share-based compensation [Line Items]
Share-based compensation (benefit)		¥ 372,281	¥ 211,189	¥ 143,350
Total unrecognized compensation expense		¥ 442,094
Weighted average period over which unrecognized compensation expense is expected to be recognized		1 year 1 month 9 days
2011 Incentive Scheme [Member] \| Restricted share units [Member] \| Employees [Member]
Share-based compensation [Line Items]
Granted (in shares)		11,977,794	22,090,030	1,530,008
2011 Incentive Scheme [Member] \| Restricted share units [Member] \| Non-employee [Member]
Share-based compensation [Line Items]
Granted (in shares)			150,000