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Gain on sale of development properties (Details) ¥ in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2022 CNY (¥)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 CNY (¥)	Dec. 31, 2020 CNY (¥)	Dec. 31, 2019
Gain on sale of development properties [Line Items]
Gain on sale of development properties	¥ 1,379	$ 200	¥ 767	¥ 1,649
Development Fund [Member]
Gain on sale of development properties [Line Items]
Gain on sale of development properties			112	¥ 468
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	10 years	10 years
General partner | Development Fund [Member]
Gain on sale of development properties [Line Items]
Committed percentage of the total capital (as a percent)				40.00%
Third Party Investor | Development Fund [Member]
Gain on sale of development properties [Line Items]
Committed percentage of the total capital (as a percent)				60.00%
Core Funds
Gain on sale of development properties [Line Items]
Gain on sale of development properties	¥ 1,289		¥ 637	¥ 1,181
Rental rate adjusted with growth rate of fair market rent	5 years	5 years		5 years	5 years
Core Funds | General partner | Minimum
Gain on sale of development properties [Line Items]
Committed percentage of the total capital (as a percent)	10.00%	10.00%
Core Funds | General partner | Maximum
Gain on sale of development properties [Line Items]
Committed percentage of the total capital (as a percent)	20.00%	20.00%
Core Funds | Third Party Investor | Minimum
Gain on sale of development properties [Line Items]
Committed percentage of the total capital (as a percent)	80.00%	80.00%
Core Funds | Third Party Investor | Maximum
Gain on sale of development properties [Line Items]
Committed percentage of the total capital (as a percent)	90.00%	90.00%

X

- Definition

Gain on sale of development properties.

+ References

No definition available.

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- Definition

The percentage committed of the total capital.

+ References

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- Definition

The interval of Rental Rate Adjusted with Growth Rate Of Fair Market Rent.

+ References

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X

- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=109226691&loc=d3e2941-110230

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 45
-Paragraph 5
-URI https://asc.fasb.org/extlink&oid=126905981&loc=d3e2443-110228

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X

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (a)(3)
-URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918673-209980

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