Financial Instruments - Unrealized gains losses (Details) oz in Thousands, lb in Millions, $ in Millions		3 Months Ended		6 Months Ended
	Jun. 30, 2023 lb oz $ / lb $ / oz $ / lb	Jun. 30, 2023 USD ($) $ / lb $ / oz $ / lb	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($) lb $ / lb $ / oz $ / lb	Jun. 30, 2022 USD ($)
Not Designated as Hedging Instrument | Amounts recorded in Sales
Realized gains (losses):
Embedded Derivative, Gain (Loss) on Embedded Derivative, Net		$ (190)	$ (753)	$ 83	$ (513)
Commodity Contract
Unrealized gains (losses):
Derivative financial instruments		(25)	(89)	(11)	(78)
Hedged item – firm sales commitments		25	89	11	78
Realized gains (losses):
Matured derivative financial instruments		$ (5)	(12)	$ 3	2
Commodity Contract | Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Nonmonetary Notional Amount, Mass | lb				88
Derivative, Average Forward Price | $ / lb	3.88	3.88		3.88
Copper Forward Contracts | Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Nonmonetary Notional Amount, Mass | lb				7
Derivative, Average Forward Price | $ / lb	3.81	3.81		3.81
Realized gains (losses):
Matured derivative financial instruments		$ 1	22	$ (1)	26
Copper | Not Designated as Hedging Instrument
Realized gains (losses):
Embedded Derivative, Gain (Loss) on Embedded Derivative, Net		$ (169)	(720)	$ 61	(502)
Copper | Short [Member] | Embedded Derivative Financial Instruments | Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Nonmonetary Notional Amount, Mass | lb	587
Derivative, Average Forward Price | $ / lb	3.90	3.90		3.90
Realized gains (losses):
Derivative Average Market Price | $ / lb	3.78	3.78		3.78
Copper | Long [Member] | Embedded Derivative Financial Instruments | Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Nonmonetary Notional Amount, Mass | lb	152
Derivative, Average Forward Price | $ / lb	3.89	3.89		3.89
Realized gains (losses):
Derivative Average Market Price | $ / lb	3.77	3.77		3.77
Gold | Short [Member] | Embedded Derivative Financial Instruments | Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Nonmonetary Notional Amount, Mass | oz	165
Derivative, Average Forward Price | $ / oz	1,980	1,980		1,980
Realized gains (losses):
Derivative Average Market Price | $ / oz	1,919	1,919		1,919
gold and other | Not Designated as Hedging Instrument
Realized gains (losses):
Embedded Derivative, Gain (Loss) on Embedded Derivative, Net		$ (21)	$ (33)	$ 22	$ (11)