Business Segments (Product Revenue) (Details) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($) segment	Sep. 30, 2024 USD ($)
Revenue from External Customer [Line Items]
Number of Operating Segments \| segment			4
PT-FI export duties	$ (135)	$ (129)	$ (337)	$ (360)
Royalty expense	(107)	(131)	(310)	(344)
Treatment chargesd	(2)	(99)	(45)	(318)
Revenues from contracts with customers	6,819	6,680	19,919	19,289
Revenues	6,972	6,790	$ 20,282	19,735
Export duty to be paid, percent			7.50%
Sales \| Not Designated as Hedging Instrument
Revenue from External Customer [Line Items]
Matured derivative financial instruments	153	110	$ 363	446
Copper In Concentrates
Revenue from External Customer [Line Items]
Revenue	1,967	1,788	5,376	5,204
Copper Cathode
Revenue from External Customer [Line Items]
Revenue	1,817	2,072	6,015	6,304
Refined Copper Products
Revenue from External Customer [Line Items]
Revenue	1,330	1,012	3,259	2,939
Purchased Copper
Revenue from External Customer [Line Items]
Revenue	18	150	489	558
Gold
Revenue from External Customer [Line Items]
Revenue	1,204	1,394	3,512	3,497
Molybdenum
Revenue from External Customer [Line Items]
Revenue	504	450	1,425	1,339
Silver And Other
Revenue from External Customer [Line Items]
Revenue	$ 223	$ 173	$ 535	$ 470

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