v3.26.1
Financial risk management - Fair value hierarchy (Details) - CNY (¥)
¥ in Thousands
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Instruments by category      
Financial assets measured at fair value ¥ 25,383,755 ¥ 18,943,827 ¥ 16,951,174
Financial liabilities measured at fair value 11,830,165 11,425,333 14,052,642
Preferred shares issued by subsidiaries      
Instruments by category      
Financial liabilities measured at fair value 10,678,693 10,961,493 13,846,145
Measured at FVTPL | Other current financial liabilities      
Instruments by category      
Financial liabilities measured at fair value 1,151,472 427,208 32,971
Measured at FVTPL | Other non-current financial liabilities      
Instruments by category      
Financial liabilities measured at fair value   36,632 173,526
Other non-current financial assets      
Instruments by category      
Financial assets measured at fair value 10,974    
Contingent consideration assets      
Instruments by category      
Financial assets measured at fair value   8,889 250,368
Measured at FVTPL | Treasury investments      
Instruments by category      
Financial assets measured at fair value 7,594,780 8,039,752 3,250,041
Measured at FVTPL | Investments in ordinary and preferred shares      
Instruments by category      
Financial assets measured at fair value 3,493,969 2,096,140 1,318,573
Measured at FVTPL | Investments in limited partnerships      
Instruments by category      
Financial assets measured at fair value     1,225,642
Measured at FVTPL | Investment in equity investment funds      
Instruments by category      
Financial assets measured at fair value 1,705,035 1,147,455  
Measured at FVTPL | Other investments      
Instruments by category      
Financial assets measured at fair value 290,229 358,464 342,504
Measured at FVTPL | Derivative assets      
Instruments by category      
Financial assets measured at fair value 3,789 122,699  
Measured at FVTPL | Short-term equity investment      
Instruments by category      
Financial assets measured at fair value 167,594    
Measured at FVTPL | Short-term debt investments      
Instruments by category      
Financial assets measured at fair value 26,517   254,501
Measured at FVTOCI | Treasury investments      
Instruments by category      
Financial assets measured at fair value 99,357 9,769 8,770
Measured at FVTOCI | Investments in ordinary shares      
Instruments by category      
Financial assets measured at fair value 5,589,169 5,624,762 8,608,691
Measured at FVTOCI | Debt investments      
Instruments by category      
Financial assets measured at fair value     1,015,875
Measured at FVTOCI | Short-term debt investments      
Instruments by category      
Financial assets measured at fair value 5,855,012 1,535,897 676,209
Measured at FVTOCI | Long-term debt instruments      
Instruments by category      
Financial assets measured at fair value 547,330    
Level 1      
Instruments by category      
Financial assets measured at fair value 6,802,215 5,771,186 8,573,606
Level 1 | Measured at FVTPL | Investments in ordinary and preferred shares      
Instruments by category      
Financial assets measured at fair value 1,063,570 176,424 51,501
Level 1 | Measured at FVTPL | Short-term equity investment      
Instruments by category      
Financial assets measured at fair value 167,594    
Level 1 | Measured at FVTOCI | Investments in ordinary shares      
Instruments by category      
Financial assets measured at fair value 5,571,051 5,594,762 8,522,105
Level 2      
Instruments by category      
Financial assets measured at fair value 2,772,652 4,840,085 4,950,895
Financial liabilities measured at fair value 215,193 93,174  
Level 2 | Measured at FVTPL | Other current financial liabilities      
Instruments by category      
Financial liabilities measured at fair value 215,193 93,174  
Level 2 | Measured at FVTPL | Treasury investments      
Instruments by category      
Financial assets measured at fair value 870,552 3,171,720 3,250,041
Level 2 | Measured at FVTPL | Derivative assets      
Instruments by category      
Financial assets measured at fair value   122,699  
Level 2 | Measured at FVTOCI | Treasury investments      
Instruments by category      
Financial assets measured at fair value 99,357 9,769 8,770
Level 2 | Measured at FVTOCI | Debt investments      
Instruments by category      
Financial assets measured at fair value     1,015,875
Level 2 | Measured at FVTOCI | Short-term debt investments      
Instruments by category      
Financial assets measured at fair value 1,802,743 1,535,897 676,209
Level 3      
Instruments by category      
Financial assets measured at fair value 15,808,888 8,332,556 3,426,673
Financial liabilities measured at fair value 11,614,972 11,332,159 14,052,642
Level 3 | Preferred shares issued by subsidiaries      
Instruments by category      
Financial liabilities measured at fair value 10,678,693 10,961,493 13,846,145
Level 3 | Measured at FVTPL | Other current financial liabilities      
Instruments by category      
Financial liabilities measured at fair value 936,279 334,034 32,971
Level 3 | Measured at FVTPL | Other non-current financial liabilities      
Instruments by category      
Financial liabilities measured at fair value   36,632 173,526
Level 3 | Other non-current financial assets      
Instruments by category      
Financial assets measured at fair value 10,974    
Level 3 | Contingent consideration assets      
Instruments by category      
Financial assets measured at fair value   8,889 250,368
Level 3 | Measured at FVTPL | Treasury investments      
Instruments by category      
Financial assets measured at fair value 6,724,228 4,868,032  
Level 3 | Measured at FVTPL | Investments in ordinary and preferred shares      
Instruments by category      
Financial assets measured at fair value 2,430,399 1,919,716 1,267,072
Level 3 | Measured at FVTPL | Investments in limited partnerships      
Instruments by category      
Financial assets measured at fair value     1,225,642
Level 3 | Measured at FVTPL | Investment in equity investment funds      
Instruments by category      
Financial assets measured at fair value 1,705,035 1,147,455  
Level 3 | Measured at FVTPL | Other investments      
Instruments by category      
Financial assets measured at fair value 290,229 358,464 342,504
Level 3 | Measured at FVTPL | Derivative assets      
Instruments by category      
Financial assets measured at fair value 3,789    
Level 3 | Measured at FVTPL | Short-term debt investments      
Instruments by category      
Financial assets measured at fair value 26,517   254,501
Level 3 | Measured at FVTOCI | Investments in ordinary shares      
Instruments by category      
Financial assets measured at fair value 18,118 ¥ 30,000 ¥ 86,586
Level 3 | Measured at FVTOCI | Short-term debt investments      
Instruments by category      
Financial assets measured at fair value 4,052,269    
Level 3 | Measured at FVTOCI | Long-term debt instruments      
Instruments by category      
Financial assets measured at fair value ¥ 547,330