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Acquisition of assets for development, land use rights.

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Acquisition of assets for development, property, equipment and software, net.

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The amount of net income allocated to other reserve funds for entities incorporated in China.

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Contract with customer liability revenue recognized including additions.

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Fulfillment costs represent packaging material costs and those costs incurred in outbound shipping, operating and staffing the Group's fulfillment and customer service centers, including costs attributable to buying, receiving, inspecting and warehousing inventories; picking, packaging and preparing customer orders for shipment; processing payment and related transaction costs and responding to inquiries from customers. Fulfillment costs also contain third party transaction fees, such as credit card processing and debit card processing fees.

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For entities incorporated in PRC, the minimum percentage of the after-tax net income allocated to a general reserve until the reserve balance is a specified percentage of the registered capital.

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For entities incorporated in PRC, the minimum percentage of the after-tax net income allocated to a statutory surplus until the reserve balance is a specified percentage of the registered capital.

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Represents number of finance leases.

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For entities incorporated in PRC, the ratio of the statutory reserve to the registered capital which triggers the elimination of the requirement to contribute to the statutory reserve.

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For entities incorporated in PRC, the ratio of the statutory surplus to the registered capital which triggers the elimination of the requirement to contribute to the statutory reserve.

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Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line.

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Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.

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Amount of liability for consideration received or receivable from customer which is not included in transaction price, when consideration is expected to be refunded to customer, classified as current.

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Amount of right to recover product from customer on settling refund liability, classified as current.

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Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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Indicates (true false) whether practical expedient was elected to recognize incremental cost of obtaining contract as expense when incurred if amortization period would have been one year or less.

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Summary of significant accounting policies (Details 3) ¥ in Millions, $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2024 segment	Dec. 31, 2024 CNY (¥) segment lease	Dec. 31, 2024 USD ($) segment lease	Dec. 31, 2023 CNY (¥) segment lease	Dec. 31, 2022 CNY (¥) lease
Revenue
Liabilities for return allowances		¥ 1,029		¥ 950
Net revenues		1,158,819	$ 158,758	1,084,662	¥ 1,046,236
Unearned revenue		28,458		29,143
Unearned revenue recognized		¥ 22,770
Revenue, Practical Expedient		true	true
Fulfillment
Fulfillment		¥ 70,426	$ 9,648	64,558	63,011
Marketing
Advertising costs		¥ 38,172		¥ 31,761	¥ 29,898
Leases
Number of finance leases \| lease		0	0	0	0
Segment reporting
Number of major business segments \| segment	3	4	4	4
Segment Reporting, CODM, Individual Title and Position or Group Name [Extensible Enumeration]		Chief Executive Officer [Member]	Chief Executive Officer [Member]
Statutory reserves
Appropriations of statutory reserves		¥ 579		¥ 2,636	¥ 1,887
Appropriations to other reserve funds		0		0	0
Recent accounting pronouncements
Acquisition of assets for development, property, equipment and software, net		4,079		5,997
Acquisition of assets for development, construction in progress		144		1,009
Acquisition of assets for development, land use rights		¥ 240		2,638
PRC \| General reserve fund \| Foreign invested enterprise
Statutory reserves
Minimum portion of after tax profit to be allocated to general reserve under PRC law (as a percentage)		10.00%	10.00%
Maximum percentage of statutory general reserve related to entity's registered capital		50.00%	50.00%
PRC \| Statutory surplus reserve \| Domestic enterprise
Statutory reserves
Minimum portion of after tax profit to be allocated to statutory surplus under PRC law (as a percentage)		10.00%	10.00%
Maximum percentage of statutory surplus reserve related to entity's registered capital		50.00%	50.00%
Electronics and home appliance products
Revenue
Net revenues		¥ 564,982		538,799	515,945
General merchandise products
Revenue
Net revenues		363,025		332,425	349,117
Shipping
Fulfillment
Fulfillment		32,643		29,858	28,958
Online marketplace and marketing services
Revenue
Net revenues		90,111		84,726	81,970
Logistics and other services
Revenue
Net revenues		140,701		128,712	¥ 99,204
Accrued expenses and other current liabilities
Revenue
Liabilities for return allowances		1,029		950
Prepayments and other current assets
Revenue
Rights to recover products from customers		¥ 1,056		¥ 989