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Business acquisition (Details)
¥ in Millions, $ in Millions
1 Months Ended 12 Months Ended
Feb. 28, 2022
CNY (¥)
Feb. 28, 2022
USD ($)
Feb. 28, 2022
CNY (¥)
Dec. 31, 2023
Dec. 31, 2022
CNY (¥)
Dec. 31, 2021
CNY (¥)
Business Acquisition [Line Items]            
Finite-Lived Intangible Asset, Useful Life       12 years 1 month 6 days 12 years 1 month 6 days  
Goodwill, Acquired During Period         ¥ 11,478 ¥ 1,529
Dada [Member]            
Business Acquisition [Line Items]            
Goodwill, Acquired During Period         3,143  
Jd Retail [Member]            
Business Acquisition [Line Items]            
Goodwill, Acquired During Period         1,399 1,529
Dada Acquisition [Member]            
Business Acquisition [Line Items]            
Business Acquisition, Percentage of Voting Interests Acquired 52.00%   52.00%      
Finite-Lived Intangible Asset, Useful Life 7 years          
Cash consideration and business cooperation agreement as consideration of the acquisition | $   $ 800        
Business Combination Step Acquisition Equity Interest In Acquiree Remeasurement Gain     ¥ 72      
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Cash And Equivalents And Restricted Cash ¥ 4,623   4,623      
Business Acquisition, Pro Forma Revenue         1,047,200 956,800
Business Acquisition, Pro Forma Net Income (Loss)         ¥ 9,500 ¥ (6,300)
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Premium ¥ 3,623   ¥ 3,623