v3.25.1
Share-based compensation (Details 2)
$ / shares in Units, ¥ in Millions, $ in Millions
 12 Months Ended
Dec. 31, 2024
CNY (¥)
shares
Dec. 31, 2024
CNY (¥)
$ / shares
shares
Dec. 31, 2023
CNY (¥)
shares
Dec. 31, 2023
USD ($)
$ / shares
Dec. 31, 2022
CNY (¥)
shares
Dec. 31, 2022
USD ($)
$ / shares
Dec. 31, 2021
USD ($)
$ / shares
shares
Dec. 31, 2024
USD ($)
$ / shares
shares
Additional disclosures                
Share-based compensation expenses | ¥ ¥ 2,999   ¥ 4,804   ¥ 7,548      
Share Incentive Plan | Employee and non-employee | RSU | Service-based                
Number of Shares                
Unvested at the beginning of the year (in shares) 53,988,060   71,641,054   95,108,866      
Granted (in shares) 43,677,248   16,682,380   13,951,100      
Vested (in shares) (16,805,414)   (19,416,652)   (23,123,292)      
Forfeited or cancelled (9,876,472)   (14,918,722)   (14,295,620)      
Unvested at the end of the year (in shares) 70,983,422   53,988,060   71,641,054   95,108,866  
Weighted-Average Grant-Date Fair Value                
Unvested at the beginning of the year (in dollars per share) | $ / shares   $ 25.4   $ 27.56   $ 25.89    
Granted (in dollars per share) | $ / shares   15.33   18.24   29.81    
Vested (in dollars per share) | $ / shares   25.07   24.83   23.04    
Forfeited or cancelled | $ / shares   23.6   28.48   25.94    
Unvested at the end of the year (in dollars per share) | $ / shares   $ 19.53   25.4   27.56 $ 25.89  
Additional disclosures                
Share-based compensation expenses | ¥ ¥ 1,024   ¥ 1,840   ¥ 3,877      
Unrecognized share-based compensation expense related to awards other than options | ¥ ¥ 3,622 $ 3,622            
Weighted-average period over which share-based compensation expense is expected to be recognized 3 years              
Total fair value of RSUs vested | ¥ ¥ 1,909   ¥ 2,930   ¥ 4,590      
Share Incentive Plan | Employee and non-employee | Options | Service-based                
Number of share options                
Outstanding at the beginning of the year (in shares) 803,820   2,314,136   2,937,112      
Granted (in shares) 0   0   0      
Exercised (in shares) (122,670)   (1,485,726)   (620,476)      
Forfeited or cancelled (35,410)   (24,590)   (2,500)      
Outstanding at the end of the year (in shares) 645,740   803,820   2,314,136   2,937,112  
Vested and expected to vest at the end of the year (in shares) 645,740 645,740           645,740
Exercisable at the end of the year (in shares) 645,740 645,740           645,740
Weighted Average Exercise Price                
Outstanding at the beginning of the year (in dollars per share) | $ / shares   $ 12.43   7.29   6.95    
Exercised (in dollars per share) | $ / shares   13.01   4.44   5.7    
Forfeited or cancelled (in dollars per share) | $ / shares   14.98   11.65   3.96    
Outstanding at the end of the year (in dollars per share) | $ / shares   $ 12.18   $ 12.43   $ 7.29 $ 6.95  
Vested and expected to vest at the end of the year (in dollars per share) | $ / shares               $ 12.18
Exercisable at the end of the year (in dollars per share) | $ / shares               $ 12.18
Weighted Average Remaining Contractual Term (years)                
Outstanding at the end of the year 3 years 3 months 18 days   3 years 8 months 12 days   2 years 2 months 12 days   2 years 10 months 24 days  
Vested and expected to vest at the end of the year 3 years 3 months 18 days              
Exercisable at the end of the year 3 years 3 months 18 days              
Aggregate Intrinsic Value                
Outstanding at the end of the year (in dollars) | $       $ 2   $ 48 $ 82 $ 3
Vested and expected to vest at the end of the year (in dollars) | $               3
Exercisable at the end of the year (in dollars) | $               $ 3
Additional disclosures                
Total intrinsic value of options exercised | ¥ ¥ 2   ¥ 98   ¥ 98      
Share Incentive Plan | Non-employees | RSU | Service-based                
Number of Shares                
Unvested at the beginning of the year (in shares) 2,838,656              
Unvested at the end of the year (in shares) 1,865,542   2,838,656          
Share Incentive Plan | Non-employees | Options | Service-based                
Number of share options                
Outstanding at the beginning of the year (in shares) 57,206              
Outstanding at the end of the year (in shares) 40,536   57,206          
Share Incentive Plan | Year ten | Employee and non-employee | RSUs and options                
Share-based compensation                
Vesting schedule 6 years