v3.26.1
Short-term loans (Details)
€ in Millions, ¥ in Millions, RM in Millions, $ in Millions, $ in Millions
12 Months Ended
Dec. 31, 2025
CNY (¥)
Dec. 31, 2025
USD ($)
Dec. 31, 2025
EUR (€)
Dec. 31, 2024
CNY (¥)
Dec. 31, 2024
USD ($)
Dec. 31, 2024
HKD ($)
Dec. 31, 2024
MYR (RM)
Dec. 31, 2024
EUR (€)
Dec. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
Dec. 31, 2023
CNY (¥)
Short term loans                      
Long-term debt, gross ¥ 6,390.0     ¥ 2,390.0             ¥ 1,800.0
Debt instrument unused borrowing capacity amount ¥ 4,230.0     ¥ 2,340.0              
Debt instrument, term 1 year 1 year 1 year 1 year 1 year 1 year 1 year 1 year      
Company And Its Subsidiaries                      
Short term loans                      
Debt instrument collateral amount ¥ 5,230.0               $ 748.5    
Company And Its Subsidiaries                      
Short term loans                      
Debt instrument collateral amount 665.0                    
Certain patents owned by one subsidiary of the Company                      
Short term loans                      
Debt instrument collateral amount 490.0                    
RMB denominated                      
Short term loans                      
Discounted commercial bill amount 3,000.0     ¥ 1,680.0              
RMB denominated | Revolving credit facility                      
Short term loans                      
Letter of guarantee procurement amount expired 611.3     540.5              
RMB denominated | Revolving credit facility | For issuing letter of guarantee for procurement                      
Short term loans                      
Drawn down from debt 634.5     ¥ 652.1              
RMB denominated | Revolving credit facility | As security deposits for short-term investments                      
Short term loans                      
Drawn down from debt ¥ 101.5                    
RMB denominated | Revolving credit facility | Minimum                      
Short term loans                      
Interest rate (as a percent) 0.76%     1.25%         0.76% 1.25%  
RMB denominated | Revolving credit facility | Maximum                      
Short term loans                      
Interest rate (as a percent) 1.32%     1.80%         1.32% 1.80%  
RMB denominated | Revolving credit facility agreement with multiple banks.                      
Short term loans                      
Maximum credit facility ¥ 21,100.0     ¥ 12,930.0              
Drawn down from debt 294.0     720.0              
US$ denominated | Revolving credit facility                      
Short term loans                      
Drawn down from debt 2,100.0                    
US$ denominated | Revolving credit facility | For issuing letter of guarantee for procurement                      
Short term loans                      
Drawn down from debt           $ 2.0 RM 0.3        
US$ denominated | Revolving credit facility agreement with multiple banks.                      
Short term loans                      
Maximum credit facility       1,790.0              
Drawn down from debt | $   $ 300.0                  
US$ denominated | Revolving credit facility agreement with multiple banks. | For issuing letter of guarantee for procurement                      
Short term loans                      
Drawn down from debt 1.3 0.2 € 0.2 ¥ 2.4 $ 0.3            
US$ denominated | Revolving credit facility agreement with multiple banks. | Revolving credit facility                      
Short term loans                      
Maximum credit facility 5,230.0               $ 748.5 $ 245.5  
US$ denominated | US Denominated Revolving credit facility agreement with multiple banks                      
Short term loans                      
Drawn down from debt 1,400.0 $ 200.0                  
EUR denominated | Revolving credit facility                      
Short term loans                      
Letter of guarantee procurement amount expired 38.3                    
Interest rate (as a percent)       0.02%           0.02%  
EUR denominated | Revolving credit facility | For issuing letter of guarantee for procurement                      
Short term loans                      
Drawn down from debt ¥ 63.9                    
EUR denominated | Revolving credit facility agreement with multiple banks.                      
Short term loans                      
Drawn down from debt       ¥ 2.6       € 0.3      
EUR denominated | Revolving credit facility agreement with multiple banks. | For issuing letter of guarantee for procurement                      
Short term loans                      
Drawn down from debt       ¥ 43.3