v3.26.1
Long-term debt - Summary of the Company's non-current portion of unsecured senior notes (Details)
$ in Millions
Dec. 31, 2025
USD ($)
Dec. 31, 2025
CNY (¥)
May 31, 2025
USD ($)
Dec. 31, 2024
CNY (¥)
Jan. 31, 2023
USD ($)
Jan. 31, 2023
CNY (¥)
Nov. 30, 2021
USD ($)
Jun. 30, 2020
USD ($)
Apr. 30, 2019
USD ($)
Debt Instrument [Line Items]                  
Carrying value   ¥ 4,775,871,000   ¥ 95,153,000          
Unamortized discount and debt issuance costs   74,122,000   539,000          
Total principal amounts of unsecured senior notes   4,849,993,000   95,692,000          
April 2026 Notes [Member]                  
Debt Instrument [Line Items]                  
Carrying value     86,000          
Unamortized discount and debt issuance costs   (100)   (400)          
Total principal amounts of unsecured senior notes   ¥ 84,300   86,300         $ 500.0
Effective interest rate 1.74% 1.74%             1.375%
2027 Notes [Member]                  
Debt Instrument [Line Items]                  
Carrying value   ¥ 182,000            
Unamortized discount and debt issuance costs   (700)   (4,200)          
Total principal amounts of unsecured senior notes   ¥ 200,000   700,000       $ 800.0  
Effective interest rate 1.52% 1.52%           1.25%  
December 2026 Notes [Member]                  
Debt Instrument [Line Items]                  
Carrying value     95,067,000          
Unamortized discount and debt issuance costs   (300,000)   (500,000)          
Total principal amounts of unsecured senior notes   ¥ 93,500,000   95,600,000 $ 384.8 ¥ 2,600,000,000 $ 1,600.0    
Effective interest rate 0.80% 0.80%         0.50%    
2030 Notes [Member]                  
Debt Instrument [Line Items]                  
Carrying value   ¥ 4,775,689,000            
Unamortized discount and debt issuance costs   (74,100,000)              
Total principal amounts of unsecured senior notes $ 690.0 ¥ 4,849,900,000 $ 690.0            
Effective interest rate 0.98% 0.98% 0.625%