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Related party transactions (Details 2) - CNY (¥) ¥ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Tencent Group \| Commission service revenue from cooperation on advertising business
Related Party Transaction [Line Items]
Revenues			¥ 44
Tencent Group \| Services provided and products sold
Related Party Transaction [Line Items]
Revenues			77
Tencent Group \| Services received and purchases
Related Party Transaction [Line Items]
Cost of revenues and operating expenses			1,314
Dada Group \| Non-compete agreement
Related Party Transaction [Line Items]
Other income			13
Dada Group \| Services provided and products sold
Related Party Transaction [Line Items]
Revenues			135
Dada Group \| Services received
Related Party Transaction [Line Items]
Cost of revenues and operating expenses			212
JD Technology \| Loan
Related Party Transaction [Line Items]
Other income		¥ 287	301
JD Technology \| Services provided and products sold
Related Party Transaction [Line Items]
Revenues	¥ 1,701	1,696	1,044
JD Technology \| Payment processing and other services received
Related Party Transaction [Line Items]
Cost of revenues and operating expenses	13,693	13,833	11,494
Property Funds \| Loan
Related Party Transaction [Line Items]
Other income	48	56	43
Property Funds \| Services provided and products sold
Related Party Transaction [Line Items]
Revenues	208	177	131
Property Funds \| Lease and property management services received
Related Party Transaction [Line Items]
Cost of revenues and operating expenses	¥ 1,765	¥ 1,681	¥ 1,249