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Gain on sale of development properties (Details) ¥ in Millions, $ in Millions			12 Months Ended
	Jan. 31, 2020 CNY (¥)	Feb. 27, 2019 CNY (¥)	Dec. 31, 2021 CNY (¥)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 CNY (¥)	Dec. 31, 2019 CNY (¥)	Dec. 31, 2020 USD ($)	Feb. 28, 2019
Gain on sale of development properties [Line Items]
Gain on sale of development properties			¥ 767	$ 120	¥ 1,649	¥ 3,885
Disposal group discontinued operations cash and cash equivalents					¥ 116		$ 18
Core Fund II | Modern Logistics Facilities
Gain on sale of development properties [Line Items]
Total gross asset value to be disposed to Core Fund	¥ 5,000
Logistics Investment Development Fund One
Gain on sale of development properties [Line Items]
Committed percentage of the total capital (as a percent)					40.00%		40.00%
Minimum
Gain on sale of development properties [Line Items]
Lease term	4 years	4 years
Maximum
Gain on sale of development properties [Line Items]
Lease term	7 years	7 years
Core Fund
Gain on sale of development properties [Line Items]
Total gross asset value to be disposed to Core Fund		¥ 11,000
Core Funds
Gain on sale of development properties [Line Items]
Gain on sale of development properties			637		¥ 1,181	¥ 3,801
Rental rate adjusted with growth rate of fair market rent	5 years	5 years
Core Funds | General partner
Gain on sale of development properties [Line Items]
Committed percentage of the total capital (as a percent)	10.00%							20.00%
Core Funds | GIC
Gain on sale of development properties [Line Items]
Committed percentage of the total capital (as a percent)	90.00%							80.00%
GIC And Mubdala Investment Company | Logistics Investment Development Fund One
Gain on sale of development properties [Line Items]
Committed percentage of the total capital (as a percent)					60.00%		60.00%
GIC And Mubdala Investment Company | Logistics Investment Development Fund One | Modern Logistics Facilities
Gain on sale of development properties [Line Items]
Gain on sale of development properties			¥ 112		¥ 468
JD Aries Development Member
Gain on sale of development properties [Line Items]
Percentage of equity interest disposed			60.00%	60.00%
Gain on disposal of assets			¥ 18
Core Fund II
Gain on sale of development properties [Line Items]
Disposal group discontinued operations cash and cash equivalents					¥ 116

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Gain on sale of development properties.

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Amount of assets held-for-sale that are not part of a disposal group.

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Amount classified as cash and cash equivalents attributable to disposal group held for sale or disposed of.

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Amount of gain (loss) on sale or disposal of property, plant and equipment assets, excluding oil and gas property and timber property.

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The difference between the carrying value and the sale price of real estate or properties that were intended to be sold or held for capital appreciation or rental income. This element refers to the gain (loss) included in earnings and not to the cash proceeds of the sale. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method.

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Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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