v3.26.1
Financial and derivative instruments - Summary of net notional long/(short) position of derivative instruments (Detail) - bbl
bbl in Thousands
Jun. 30, 2026
Dec. 31, 2025
Crude Oil | Long    
Derivative [Line Items]    
Derivative, nonmonetary notional amount, volume 5,857 954
Products | Long    
Derivative [Line Items]    
Derivative, nonmonetary notional amount, volume 559  
Products | Short    
Derivative [Line Items]    
Derivative, nonmonetary notional amount, volume   702