Financial Instruments (Unrealized gains losses) (Details) oz in Thousands, lb in Millions, $ in Millions		3 Months Ended
	Mar. 31, 2022 oz lb $ / oz $ / lb $ / lb	Mar. 31, 2022 USD ($) $ / oz $ / lb $ / lb	Mar. 31, 2021 USD ($)
Not Designated as Hedging Instrument [Member] | Amounts recorded in Sales [Member]
Realized gains (losses):
Embedded Derivative, Gain (Loss) on Embedded Derivative, Net		$ 240	$ 179
Commodity Contract
Unrealized gains (losses):
Derivative financial instruments		12	3
Hedged item – firm sales commitments		(12)	(3)
Realized gains (losses):
Matured derivative financial instruments		$ 14	24
Commodity Contract | Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Nonmonetary Notional Amount, Mass | lb	84
Derivative, Average Forward Price | $ / lb	4.47	4.47
Copper Forward Contracts | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Nonmonetary Notional Amount, Mass | lb	4
Derivative, Average Forward Price | $ / lb	4.60	4.60
Copper Forward Contracts | Not Designated as Hedging Instrument [Member] | Amounts recorded in Cost of Sales
Realized gains (losses):
Matured derivative financial instruments		$ 4	(8)
Copper | Not Designated as Hedging Instrument [Member] | Amounts recorded in Sales [Member]
Realized gains (losses):
Embedded Derivative, Gain (Loss) on Embedded Derivative, Net		$ 218	207
Copper | Short [Member] | Embedded Derivative Financial Instruments | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Nonmonetary Notional Amount, Mass | lb	753
Derivative, Average Forward Price | $ / lb	4.49	4.49
Realized gains (losses):
Derivative Average Market Price | $ / lb	4.71	4.71
Copper | Long [Member] | Embedded Derivative Financial Instruments | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Nonmonetary Notional Amount, Mass | lb	65
Derivative, Average Forward Price | $ / lb	4.43	4.43
Realized gains (losses):
Derivative Average Market Price | $ / lb	4.71	4.71
Gold | Short [Member] | Embedded Derivative Financial Instruments | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Nonmonetary Notional Amount, Mass | oz	206
Derivative, Average Forward Price | $ / oz	1,925	1,925
Realized gains (losses):
Derivative Average Market Price | $ / oz	1,936	1,936
gold and other | Not Designated as Hedging Instrument [Member] | Amounts recorded in Sales [Member]
Realized gains (losses):
Embedded Derivative, Gain (Loss) on Embedded Derivative, Net		$ 22	$ (28)