Financial Instruments (Unrealized gains losses) (Details) oz in Thousands, lb in Millions, $ in Millions		3 Months Ended		6 Months Ended
	Jun. 30, 2022 lb oz $ / lb $ / oz $ / lb	Jun. 30, 2022 USD ($) $ / lb $ / oz $ / lb	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($) $ / lb $ / oz $ / lb	Jun. 30, 2021 USD ($)
Not Designated as Hedging Instrument | Amounts recorded in Sales
Realized gains (losses):
Embedded Derivative, Gain (Loss) on Embedded Derivative, Net		$ (753)	$ 133	$ (513)	$ 312
Commodity Contract
Unrealized gains (losses):
Derivative financial instruments		(89)	(11)	(78)	(8)
Hedged item – firm sales commitments		89	11	78	8
Realized gains (losses):
Matured derivative financial instruments		$ (12)	28	$ 2	52
Commodity Contract | Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Nonmonetary Notional Amount, Mass | lb	103
Derivative, Average Forward Price | $ / lb	4.36	4.36		4.36
Copper Forward Contracts | Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Nonmonetary Notional Amount, Mass | lb	34
Derivative, Average Forward Price | $ / lb	4.06	4.06		4.06
Copper Forward Contracts | Not Designated as Hedging Instrument | Amounts recorded in Cost of Sales
Realized gains (losses):
Matured derivative financial instruments		$ 22	(5)	$ 26	(13)
Copper | Not Designated as Hedging Instrument | Amounts recorded in Sales
Realized gains (losses):
Embedded Derivative, Gain (Loss) on Embedded Derivative, Net		$ (720)	118	$ (502)	325
Copper | Short [Member] | Embedded Derivative Financial Instruments | Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Nonmonetary Notional Amount, Mass | lb	703
Derivative, Average Forward Price | $ / lb	4.41	4.41		4.41
Realized gains (losses):
Derivative Average Market Price | $ / lb	3.75	3.75		3.75
Copper | Long [Member] | Embedded Derivative Financial Instruments | Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Nonmonetary Notional Amount, Mass | lb	59
Derivative, Average Forward Price | $ / lb	4.39	4.39		4.39
Realized gains (losses):
Derivative Average Market Price | $ / lb	3.75	3.75		3.75
Gold | Short [Member] | Embedded Derivative Financial Instruments | Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Nonmonetary Notional Amount, Mass | oz	236
Derivative, Average Forward Price | $ / oz	1,848	1,848		1,848
Realized gains (losses):
Derivative Average Market Price | $ / oz	1,821	1,821		1,821
gold and other | Not Designated as Hedging Instrument | Amounts recorded in Sales
Realized gains (losses):
Embedded Derivative, Gain (Loss) on Embedded Derivative, Net		$ (33)	$ 15	$ (11)	$ (13)