Amount of cash bonus received within the compensation plan period.

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Amount of cash salary received per year within the compensation plan period.

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Represents the exercise multiple which is estimated as the ratio of fair value of underlying shares over the exercise price as at the time the option is exercise.

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No definition available.

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The fair value of the underlying shares on the date of option grants that is used in valuing an option on its own shares.

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.F)
-URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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-Section 50
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
-Paragraph 2
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-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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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.

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- Definition

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

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No definition available.

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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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).

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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The risk-free interest rate assumption that is used in valuing an option on its own shares.

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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.

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

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Percentage of vesting of share-based compensation awards.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Share-based compensation (Details 4)		1 Months Ended		12 Months Ended
Share-based compensation (Details 4)	Mar. 11, 2014 $ / shares shares	May 31, 2015 $ / shares	May 31, 2015 CNY (¥) shares	Dec. 31, 2016 CNY (¥)	Dec. 31, 2015 CNY (¥)	Dec. 31, 2014 CNY (¥)	Dec. 31, 2015 USD ($)
Share-based compensation
Share-based compensation expenses				¥ 2,343,785,000	¥ 1,193,945,000	¥ 4,249,548,000
Founder \| RSUs \| Share Incentive Plan
Share-based compensation
Granted (in shares) \| shares	93,780,970
Share-based compensation expenses						¥ 3,685,041,000
Grant date fair value \| $ / shares	$ 6.3
Founder \| Share options \| Share Incentive Plan
Share-based compensation
Share-based compensation expenses				318,156,000	¥ 240,024,000
Term of compensation plan			10 years
Cash salary to be received per year			¥ 1
Cash bonus to be received			¥ 0
Vesting schedule			10 years
Assumptions used to calculate estimated fair value of each option grant
Exercise multiples					2.0
Expected dividend yield (as a percent)					0.00%
Expected term (in years)					10 years
Unrecognized share-based compensation expense related to the founder share options granted				¥ 846,458,000
Weighted-average period over which share-based compensation expense is expected to be recognized				8 years 4 months 24 days
Founder \| Share options \| Share Incentive Plan \| Minimum
Assumptions used to calculate estimated fair value of each option grant
Expected volatility (as a percent)					36.00%
Risk-free interest rate (per annum) (as a percent)					2.74%
Fair value of the underlying shares on the date of option grants (in dollars) \| $							$ 16.70
Founder \| Share options \| Share Incentive Plan \| Maximum
Assumptions used to calculate estimated fair value of each option grant
Expected volatility (as a percent)					38.00%
Risk-free interest rate (per annum) (as a percent)					2.79%
Fair value of the underlying shares on the date of option grants (in dollars) \| $							$ 16.93
Each anniversary \| Founder \| Share options \| Share Incentive Plan
Share-based compensation
Vesting percentage (as a percent)			10.00%
Class A ordinary shares \| Founder \| Share options \| Share Incentive Plan
Share-based compensation
Granted (in shares) \| shares			26,000,000
Exercise price \| $ / shares		$ 16.70
ADS \| Founder \| Share options \| Share Incentive Plan
Share-based compensation
Exercise price \| $ / shares		$ 33.40