Contingencies and Commitments - Asset Retirement Obligations (Details) $ in Millions	9 Months Ended
	Sep. 30, 2022 USD ($)
Other Commitments [Line Items]
Frequency of closure costs updates	6 years
Frequency of financial assurance mechanism updates	2 years
Morenci
Other Commitments [Line Items]
Increase in ARO liability and asset retirement cost asset	$ 117
Bagdad
Other Commitments [Line Items]
Increase in ARO liability and asset retirement cost asset	$ 65