Debt and Equity - Additional Information (Details) - USD ($) $ / shares in Units, shares in Millions	3 Months Ended		9 Months Ended		47 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Oct. 31, 2025	Dec. 31, 2024
Debt Instrument [Line Items]
Interest costs	$ 182,000,000	$ 173,000,000	$ 537,000,000	$ 529,000,000
Interest costs capitalized	$ 75,000,000	$ 101,000,000	$ 278,000,000	$ 280,000,000
Treasury stock purchases (in shares)			2.9
Shares repurchased			$ 107,000,000
Cost per share repurchased (in dollars per share)			$ 36.41
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
Subsequent event
Debt Instrument [Line Items]
Stock repurchase program, authorized amount					$ 3,000,000,000
Subsequent event | Share Repurchase Program
Debt Instrument [Line Items]
Treasury stock purchases (in shares)					52.0
Cost per share repurchased (in dollars per share)					$ 38.51
Line of Credit | Revolving Credit Facility | October 2022 Unsecured Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 3,000,000,000.0		$ 3,000,000,000.0
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	5,000,000		5,000,000
Line of Credit | Unsecured Credit Facility | PT-FI
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	1,750,000,000		1,750,000,000
Line of credit	250,000,000		250,000,000			$ 250,000,000
Line of Credit | 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