v3.26.1
Share-based compensation (Details 2)
$ / shares in Units, ¥ in Millions, $ in Millions
 1 Months Ended 12 Months Ended 121 Months Ended
May 31, 2025
$ / shares
shares
May 31, 2015
$ / shares
shares
Dec. 31, 2025
CNY (¥)
shares
Dec. 31, 2025
CNY (¥)
$ / shares
shares
Dec. 31, 2024
CNY (¥)
shares
Dec. 31, 2024
USD ($)
$ / shares
Dec. 31, 2023
CNY (¥)
Dec. 31, 2023
$ / shares
May 31, 2025
Dec. 31, 2025
USD ($)
$ / shares
shares
Number of share options                    
Granted (in shares) | shares     5,272,500              
Weighted Average Exercise Price                    
Granted (in dollars per share) | $ / shares       $ 16.97            
Additional disclosures                    
Share-based compensation expenses | ¥     ¥ 4,726   ¥ 2,999   ¥ 4,804      
Share Based Compensation Arrangement By Share Based Payment Award Options Compensation Cost Not Yet Recognized | ¥     ¥ 202              
RSU                    
Weighted-Average Grant-Date Fair Value                    
Granted (in dollars per share) | $ / shares       18.27   $ 15.33   $ 18.24    
Additional disclosures                    
Weighted average granted fair value of the RSUs granted | $ / shares       18.27   15.33   $ 18.24    
Options                    
Additional disclosures                    
Weighted average grant date fair value of options granted | $ / shares       7.85            
ShareBasedCompensationAwardExercisePeriodExtension     10 years              
ShareBasedCompensationAwardExercisePeriod     10 years              
ShareBasedCompensationArrangementByShareBasedPaymentAwardModificationIncrementalCompensationCostRecognized | ¥     ¥ 914              
Employee benefits and share-based compensation | ¥     ¥ 1,004              
Employee and non-employee | Options                    
Additional disclosures                    
Weighted-average period over which share-based compensation expense is expected to be recognized     4 years 3 months 18 days              
Non-employees | Options | Service-based                    
Number of share options                    
Outstanding at the beginning of the year (in shares) | shares     40,536              
Outstanding at the end of the year (in shares) | shares     7,200   40,536          
Share Incentive Plan | Employee and non-employee | RSU | Service-based                    
Number of Shares                    
Unvested at the beginning of the year (in shares) | shares     70,983,422              
Granted (in shares) | shares     31,551,310              
Vested (in shares) | shares     (21,301,372)              
Forfeited or cancelled | shares     (9,370,294)              
Unvested at the end of the year (in shares) | shares     71,863,066   70,983,422          
Weighted-Average Grant-Date Fair Value                    
Unvested at the beginning of the year (in dollars per share) | $ / shares       19.53            
Granted (in dollars per share) | $ / shares       18.27            
Vested (in dollars per share) | $ / shares       21.39            
Forfeited or cancelled | $ / shares       19.21            
Unvested at the end of the year (in dollars per share) | $ / shares       $ 18.47   19.53        
Additional disclosures                    
Share-based compensation expenses | ¥     ¥ 2,442   ¥ 1,024   1,840      
Unrecognized share-based compensation expense related to awards other than options | ¥     ¥ 3,435 $ 3,435            
Weighted-average period over which share-based compensation expense is expected to be recognized     3 years 2 months 12 days              
Total fair value of RSUs vested | ¥     ¥ 2,947   ¥ 1,909   2,930      
Weighted average granted fair value of the RSUs granted | $ / shares       $ 18.27            
Share Incentive Plan | Employee and non-employee | Options | Service-based                    
Number of share options                    
Outstanding at the beginning of the year (in shares) | shares     17,645,740              
Exercised (in shares) | shares     (352,086)              
Forfeited or cancelled | shares     0              
Outstanding at the end of the year (in shares) | shares     22,566,154   17,645,740          
Vested and expected to vest at the end of the year (in shares) | shares     22,484,404 22,484,404           22,484,404
Exercisable at the end of the year (in shares) | shares     17,293,654 17,293,654           17,293,654
Weighted Average Exercise Price                    
Outstanding at the beginning of the year (in dollars per share) | $ / shares       $ 16.53            
Exercised (in dollars per share) | $ / shares       13.03            
Forfeited or cancelled (in dollars per share) | $ / shares       0            
Outstanding at the end of the year (in dollars per share) | $ / shares       $ 16.69   $ 16.53        
Vested and expected to vest at the end of the year (in dollars per share) | $ / shares                   $ 16.7
Exercisable at the end of the year (in dollars per share) | $ / shares                   $ 16.61
Weighted Average Remaining Contractual Term (years)                    
Outstanding at the end of the year     9 years 3 months 18 days   6 months          
Vested and expected to vest at the end of the year     9 years 3 months 18 days              
Exercisable at the end of the year     9 years 3 months 18 days              
Aggregate Intrinsic Value                    
Outstanding at the end of the year (in dollars) | $           $ 14       $ 1
Vested and expected to vest at the end of the year (in dollars) | $                   1
Exercisable at the end of the year (in dollars) | $                   $ 1
Additional disclosures                    
Total intrinsic value of options exercised | ¥     ¥ 10   ¥ 2   98      
Share Incentive Plan | Non-employees | RSU | Service-based                    
Number of Shares                    
Unvested at the beginning of the year (in shares) | shares     1,865,542              
Unvested at the end of the year (in shares) | shares     1,957,950   1,865,542          
Share Incentive Plan | Founder [Member] | RSU                    
Share-based compensation                    
Vesting schedule 5 years                  
Number of Shares                    
Granted (in shares) | shares 10,000,000                  
Additional disclosures                    
Share-based compensation expenses | ¥     ¥ 367              
Share Incentive Plan | Founder [Member] | Options                    
Share-based compensation                    
Vesting schedule 5 years               10 years  
Vesting percentage (as a percent) 20.00%                  
Additional disclosures                    
Share-based compensation expenses | ¥     ¥ 1,000   ¥ 21   ¥ 38      
Share Incentive Plan | Founder [Member] | Options | Common Class A [Member]                    
Number of share options                    
Granted (in shares) | shares 5,000,000 26,000,000                
Weighted Average Exercise Price                    
Granted (in dollars per share) | $ / shares $ 17.175 $ 16.7                
Share Incentive Plan | Founder [Member] | Options | American Depositary Share [Member]                    
Weighted Average Exercise Price                    
Granted (in dollars per share) | $ / shares $ 34.35 $ 33.4                
Share Incentive Plan | Founder [Member] | Options | Each anniversary                    
Share-based compensation                    
Vesting percentage (as a percent)                 10.00%