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

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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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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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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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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 award under share-based payment arrangement.

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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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Share-based compensation (Details 2)	1 Months Ended		9 Months Ended
Share-based compensation (Details 2)	May 31, 2015 CNY (¥) shares	May 31, 2015 $ / shares	Sep. 30, 2019 CNY (¥) shares	Sep. 30, 2018 CNY (¥)
Share-based compensation
Share-based compensation expenses			¥ 2,663,590,000	¥ 2,622,942,000
Share Incentive Plan
Share-based compensation
Number of ordinary shares available for future grants \| shares			144,520,143
Share Incentive Plan \| Employee and non-employee \| Multiple tranches with tiered vesting commencement dates from 2016 to 2025
Share-based compensation
Vesting schedule			6 years
Share Incentive Plan \| Employee and non-employee \| RSUs and options \| Two years
Share-based compensation
Vesting schedule			2 years
Vesting percentage (as a percent)			50.00%
Share Incentive Plan \| Employee and non-employee \| RSUs and options \| Three years
Share-based compensation
Vesting schedule			3 years
Vesting percentage (as a percent)			33.00%
Share Incentive Plan \| Employee and non-employee \| RSUs and options \| Four years
Share-based compensation
Vesting schedule			4 years
Vesting percentage (as a percent)			25.00%
Share Incentive Plan \| Employee and non-employee \| RSUs and options \| Five years
Share-based compensation
Vesting schedule			5 years
Vesting percentage (as a percent)			20.00%
Share Incentive Plan \| Employee and non-employee \| RSUs and options \| Six years
Share-based compensation
Vesting schedule			6 years
Vesting percentage (as a percent)			17.00%
Share Incentive Plan \| Employee and non-employee \| RSUs and options \| Ten years
Share-based compensation
Vesting schedule			10 years
Vesting percentage (as a percent)			10.00%
Share Incentive Plan \| Founder \| Options
Share-based compensation
Vesting schedule	10 years
Term of compensation plan	10 years
Cash salary to be received per year	¥ 1.000
Cash bonus to be received	¥ 0
Share Incentive Plan \| Founder \| Options \| Each anniversary
Share-based compensation
Vesting percentage (as a percent)	10.00%
Share Incentive Plan \| Founder \| Options \| Class A ordinary shares
Share-based compensation
Granted (in shares) \| shares	26,000,000
Exercise price \| $ / shares		$ 16.70
Share Incentive Plan \| Founder \| Options \| ADS
Share-based compensation
Exercise price \| $ / shares		$ 33.40
JD Logistics Plan \| Employee and non-employee \| Options
Share-based compensation
Share-based compensation expenses			¥ 418,066,000	¥ 262,169,000