v3.26.1
LEASES - The weighted average remaining lease terms and discount rates (Details)
¥ in Millions, $ in Millions
12 Months Ended
Dec. 31, 2025
CNY (¥)
Dec. 31, 2025
USD ($)
Dec. 31, 2024
CNY (¥)
Dec. 31, 2023
CNY (¥)
Dec. 31, 2025
USD ($)
Remaining lease term and discount rate:          
Weighted average remaining lease term (years) 1 year 8 months 19 days   1 year 7 months 2 days   1 year 8 months 19 days
Weighted average discount rate 3.773%   3.737%   3.773%
Operating lease payments ¥ 2,989.9 $ 426.7 ¥ 2,308.0 ¥ 1,442.0  
Minimum          
Remaining lease term and discount rate:          
Term of operating leases that have not yet commenced (in months) 3 months 3 months      
Maximum          
Remaining lease term and discount rate:          
Term of operating leases that have not yet commenced (in months) 72 months 72 months      
Operating lease not yet commenced          
Remaining lease term and discount rate:          
Operating leases that have not yet commenced ¥ 58.6       $ 8.4