Income Taxes - Additional Information (Details) - USD ($) $ in Millions		1 Months Ended	3 Months Ended	9 Months Ended
	Jan. 01, 2023	May 31, 2024	Mar. 31, 2024	Sep. 30, 2024	Sep. 30, 2023
Income Tax Contingency [Line Items]
Consolidated effective income tax rate (percent)				35.00%	36.00%
Tax benefit related to closure of tax audit				$ 182
Tax benefit related to closure of federal income tax exams				$ 36
Nondeductible charges					$ 142
Unrecognized Tax Benefits, Period Increase (Decrease)		$ 269
Unrecognized Tax Benefits, Decrease In Interest And Penalties		$ 319
Corporate Alternative Minimum Tax For Corporations With Average AFSI Over $1 Billion, Rate	15.00%
Three Years Average AFSI Limit, Corporate Alternative Minimum Tax	$ 1,000
PT Freeport Indonesia
Income Tax Contingency [Line Items]
Deferred Income Tax Credits			$ 215
Unrecognized Tax Benefits, Period Increase (Decrease)			276
Unrecognized Tax Benefits, Decrease In Interest And Penalties			43
Unrecognized Tax Benefits, Decrease In Contingencies			179
Unrecognized Tax Benefits, Decrease In Contingencies, Penalties And Interest			35
PT Freeport Indonesia | Income Expense (Benefit)
Income Tax Contingency [Line Items]
Deferred Income Tax Credits			199
Deferred Income Taxes			17
PT Freeport Indonesia | Direct Operating Costs
Income Tax Contingency [Line Items]
Deferred Income Tax Credits			8
PT Freeport Indonesia | Interest Income (Expense), Net
Income Tax Contingency [Line Items]
Deferred Income Tax Credits			8
PT Freeport Indonesia | Other Nonoperating Income (Expense)
Income Tax Contingency [Line Items]
Deferred Income Taxes			$ 26