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Contingencies and Commitments - Asset Retirement Obligations (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Other Commitments [Line Items]        
Increase in ARO liability and asset retirement cost asset $ 275      
Production and delivery 4,077 $ 3,553 $ 11,796 $ 10,267
Freeport-McMoRan Oil & Gas        
Other Commitments [Line Items]        
Increase in ARO liability and asset retirement cost asset     $ 115  
Production and delivery $ 99