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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

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Amount of stock repurchase plan authorized.

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Debt and Equity - Additional Information (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		1 Months Ended	3 Months Ended		6 Months Ended		9 Months Ended
	Jun. 22, 2022	Apr. 30, 2022	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Aug. 05, 2022	Jul. 31, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Long-term debt			$ 11,092		$ 11,092				$ 9,450
Repayments of debt					2,993	$ 179
Net gain on early extinguishment of debt			(8)	$ 0	(8)	0
Interest costs			$ 189	$ 165	$ 342	$ 325
Treasury stock purchases (in shares)			17.1		29.4
Shares repurchased			$ 645		$ 1,200
Cost per share repurchased (in dollars per share)			$ 37.66		$ 40.32
Stock repurchase program, authorized amount			$ 3,000		$ 3,000
Dividends declared per share of common stock (in dollars per share)	$ 0.15		$ 0.15	$ 0.075	$ 0.30	$ 0.15
Base cash dividend (in dollars per share)	0.075
Variable cash dividend (in dollars per share)	$ 0.075
Subsequent event
Debt Instrument [Line Items]
Treasury stock purchases (in shares)							47.9
Shares repurchased							$ 1,800
Cost per share repurchased (in dollars per share)							$ 38.35
Stock repurchase program, authorized amount								$ 5,000
Remaining authorized shares repurchase amount							$ 3,200
Cerro Verde
Debt Instrument [Line Items]
Repayments of debt			$ 325
Unsecured Credit Facility \| PT-FI
Debt Instrument [Line Items]
Letter of credit			$ 0		$ 0
Debt instrument, term			5 years
Increase in line of credit			$ 1,300
Net gain on early extinguishment of debt			10
Unsecured Credit Facility \| Cerro Verde
Debt Instrument [Line Items]
Letter of credit			0		0
Line of credit facility, maximum borrowing capacity			$ 350		350
Debt instrument, term			5 years
Property, Plant and Equipment
Debt Instrument [Line Items]
Interest costs capitalized			$ 33	$ 17	59	$ 32
Line of Credit \| Cerro Verde
Debt Instrument [Line Items]
Long-term debt			0		0				325
Line of Credit \| Letter of Credit
Debt Instrument [Line Items]
Letter of credit			8		8
Revolving credit facility, availability			1,500		1,500
Line of Credit \| Revolving Credit Facility
Debt Instrument [Line Items]
Long-term debt			0		0
Revolving credit facility, availability			3,500		3,500
Line of Credit \| Revolving Credit Facility \| Maturing 2024
Debt Instrument [Line Items]
Revolving credit facility, availability			3,300		3,300
Line of Credit \| Revolving Credit Facility \| Maturing 2023
Debt Instrument [Line Items]
Revolving credit facility, availability			200		200
Senior Notes
Debt Instrument [Line Items]
Principal Amount			582		582
Net gain on early extinguishment of debt			(18)
Senior Notes \| Subsequent event
Debt Instrument [Line Items]
Principal Amount							$ 291
Senior Notes \| PT-FI
Debt Instrument [Line Items]
Long-term debt			$ 2,976		$ 2,976				$ 0
Repayments of debt		$ 600
Principal Amount		3,000
Senior Notes \| PT-FI \| 4.763% Senior Notes Due 2027
Debt Instrument [Line Items]
Principal Amount		750
Senior Notes \| PT-FI \| 5.315% Senior Notes Due 2032
Debt Instrument [Line Items]
Principal Amount		1,500
Senior Notes \| PT-FI \| 6.200% Senior Notes Due 2052
Debt Instrument [Line Items]
Principal Amount		$ 750