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JD Technology reorganization (Details) - CNY (¥)
¥ in Millions
1 Months Ended 6 Months Ended 12 Months Ended
Mar. 31, 2021
Jun. 30, 2020
Jun. 30, 2017
Dec. 31, 2018
JD Technology [Member]        
JD Technology reorganization        
Additional cash in investment ¥ 4,000 ¥ 1,780    
Equity method investment, ownership percentage 41.70% 36.80%    
JD Technology [Member]        
JD Technology reorganization        
Percentage of equity interest converted from profit sharing right   36.80%    
Additional cash in investment ¥ 4,000 ¥ 1,780    
Dual Class Voting Shareholding Structure [Member] | JD Technology [Member]        
JD Technology reorganization        
Percentage of Voting Right   18.70%    
Held-for-sale | JD Technology [Member]        
JD Technology reorganization        
Percentage of equity stake disposed     68.60%  
Amount raised     ¥ 14,300  
Percentage of profit sharing right     40.00% 36.00%
Percentage of equity interest can be converted from profit sharing right     40.00% 36.00%