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Contingencies and Commitments - Asset Retirement Obligations (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Other Commitments [Line Items]        
Increase in ARO liability and asset retirement cost asset $ 261      
Production and delivery 3,875 $ 3,549 $ 7,719 $ 6,714
Freeport-McMoRan Oil & Gas        
Other Commitments [Line Items]        
Increase in ARO liability and asset retirement cost asset     $ 105  
Production and delivery $ 98