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Gain on sale of development properties (Details) ¥ in Millions, $ in Millions |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | ---
Feb. 08, 2023 CNY (¥) | Feb. 28, 2023 CNY (¥) | Dec. 31, 2024 CNY (¥) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 CNY (¥) | Dec. 31, 2022 CNY (¥)
Gain on sale of development properties [Line Items] |  |  |  |  |  |
Gain on sale of development properties |  |  | ¥ 1,527 | $ 209 | ¥ 2,283 | ¥ 1,379
Investments accounted for under the equity method |  |  | 34,294 |  | 30,460 |
Real Estate Investment Trust |  |  |  |  |  |
Gain on sale of development properties [Line Items] |  |  |  |  |  |
Gain on sale of development properties |  | ¥ 519 |  |  |  |
Proceeds from REIT listed on the shanghai stock exchange | ¥ 1,700 |  |  |  |  |
Investments accounted for under the equity method | ¥ 597 |  |  |  |  |
Percentage of subscription of units issued by real estate investment trust | 34.00% |  |  |  |  |
Description of principal activities | Company obtained significant influence but no power to control the key activities |  |  |  |  |
Minimum | Real Estate Investment Trust |  |  |  |  |  |
Gain on sale of development properties [Line Items] |  |  |  |  |  |
Lease term |  | 5 years |  |  |  |
Maximum | Real Estate Investment Trust |  |  |  |  |  |
Gain on sale of development properties [Line Items] |  |  |  |  |  |
Lease term |  | 6 years |  |  |  |
Core Funds |  |  |  |  |  |
Gain on sale of development properties [Line Items] |  |  |  |  |  |
Gain on sale of development properties |  |  | ¥ 1,527 |  | ¥ 1,764 | ¥ 1,289
Rental rate adjusted with growth rate of fair market rent |  |  | 5 years | 5 years |  |
Core Funds | Minimum |  |  |  |  |  |
Gain on sale of development properties [Line Items] |  |  |  |  |  |
Lease term |  |  | 4 years |  |  |
Core Funds | Maximum |  |  |  |  |  |
Gain on sale of development properties [Line Items] |  |  |  |  |  |
Lease term |  |  | 10 years |  |  |
Core Funds | Limited partner | Minimum |  |  |  |  |  |
Gain on sale of development properties [Line Items] |  |  |  |  |  |
Committed percentage of the total capital (as a percent) |  |  | 10.00% |  |  |
Core Funds | Limited partner | Maximum |  |  |  |  |  |
Gain on sale of development properties [Line Items] |  |  |  |  |  |
Committed percentage of the total capital (as a percent) |  |  | 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% |  |  |
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% |  |  |

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- Definition This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 270 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482964/270-10-50-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 32 -Subparagraph (ee) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-32 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 323 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481664/323-10-45-1 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 323 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481687/323-10-50-3 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(10)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 25 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-25 + Details
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- 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 -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 360 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482130/360-10-45-5 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 360 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482099/360-10-50-3 + Details
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