Debt and Equity - Additional Information (Details) - USD ($) $ / shares in Units, shares in Millions	1 Months Ended	3 Months Ended		9 Months Ended		32 Months Ended
	Jul. 31, 2024	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Jul. 31, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Interest costs		$ 173,000,000	$ 165,000,000	$ 529,000,000	$ 606,000,000
Credit for closure of income tax exams		11,000,000		11,000,000
Interest expense, net		(72,000,000)	$ (96,000,000)	(249,000,000)	(418,000,000)
Tax Matters In Peru, Contingent Liability					$ 74,000,000
Treasury stock purchases (in shares)	1.2					49.0
Shares repurchased	$ 59,000,000					$ 1,900,000,000
Cost per share repurchased (in dollars per share)	$ 50.48					$ 38.64
Stock repurchase program, authorized amount		$ 5,000,000,000.0		$ 5,000,000,000.0
Dividends declared per share of common stock (in dollars per share)		$ 0.15	$ 0.15	$ 0.45	$ 0.45
Base cash dividend (in dollars per share)		0.075
Variable cash dividend (in dollars per share)		$ 0.075
Cerro Verde | Cerro Verde
Debt Instrument [Line Items]
Interest expense, net			$ 13,000,000		$ 13,000,000
Unsecured Credit Facility | PT-FI
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity		$ 1,750,000,000		$ 1,750,000,000
Unsecured Credit Facility | Cerro Verde
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity		350,000,000		350,000,000
Line of credit		0		0
Property, Plant and Equipment
Debt Instrument [Line Items]
Interest costs capitalized		101,000,000	$ 69,000,000	280,000,000	$ 188,000,000
Line of Credit | Revolving Credit Facility | October 2022 Unsecured Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity		3,000,000,000		3,000,000,000
Line of credit		0		0
Line of Credit | Revolving Credit Facility | PT-FI | October 2022 Unsecured Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity		500,000,000		500,000,000
Line of Credit | Letter of Credit
Debt Instrument [Line Items]
Revolving credit facility, availability		1,500,000,000		1,500,000,000
Line of credit		7,000,000		7,000,000
Line of Credit | Unsecured Credit Facility | PT-FI
Debt Instrument [Line Items]
Line of credit		$ 250,000,000		$ 250,000,000			$ 0