v3.26.1
Summary of significant accounting policies (Details 3)
¥ in Millions, $ in Millions
3 Months Ended 12 Months Ended
Mar. 31, 2024
segment
Dec. 31, 2025
CNY (¥)
segment
Dec. 31, 2025
USD ($)
segment
Dec. 31, 2024
CNY (¥)
segment
Dec. 31, 2023
CNY (¥)
Revenue          
Liabilities for return allowances   ¥ 1,063   ¥ 1,029  
Net revenues   1,309,085 $ 187,197 1,158,819 ¥ 1,084,662
Unearned revenue   30,949   28,458  
Unearned revenue recognized   ¥ 23,238      
Revenue, Practical Expedient   true true    
Fulfillment          
Fulfillment   ¥ 88,176 $ 12,609 70,426 64,558
Marketing          
Advertising costs   ¥ 72,236   ¥ 38,172 31,761
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   ¥ 929   ¥ 579 2,636
Appropriations to other reserve funds   0   0 0
Recent accounting pronouncements          
Acquisition of assets for development, property, equipment and software, net   3,707   4,079 5,997
Acquisition of assets for development, construction in progress   73   144 1,009
Acquisition of assets for development, land use rights   ¥ 700   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   ¥ 605,131   564,982 538,799
General merchandise products          
Revenue          
Net revenues   418,671   363,025 332,425
Shipping          
Fulfillment          
Fulfillment   40,004   32,643 29,858
Online marketplace and marketing services          
Revenue          
Net revenues   107,131   90,111 84,726
Logistics and other services          
Revenue          
Net revenues   178,152   140,701 ¥ 128,712
Accrued expenses and other current liabilities          
Revenue          
Liabilities for return allowances   1,063   1,029  
Prepayments and other current assets          
Revenue          
Rights to recover products from customers   ¥ 1,115   ¥ 1,056