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Fair Value (Instruments Not Measured at Fair Value) (Details) - USD ($)
$ in Millions
Sep. 30, 2025
Dec. 31, 2024
Estimate of Fair Value Measurement [Member]    
Assets, Fair Value Disclosure [Abstract]    
Accounts receivable - noncurrent [1] $ 990 $ 171
Liabilities, Fair Value Disclosure [Abstract]    
Non-recourse debt 24,775 23,066
Recourse debt 5,241 4,538
Carrying Amount [Member]    
Assets, Fair Value Disclosure [Abstract]    
Accounts receivable - noncurrent [1] 877 87
Liabilities, Fair Value Disclosure [Abstract]    
Non-recourse debt 23,927 22,743
Recourse debt 6,246 5,704
Level 1 [Member] | Estimate of Fair Value Measurement [Member]    
Assets, Fair Value Disclosure [Abstract]    
Accounts receivable - noncurrent 0 0
Liabilities, Fair Value Disclosure [Abstract]    
Non-recourse debt 0 0
Recourse debt 0 0
Level 2 [Member] | Estimate of Fair Value Measurement [Member]    
Assets, Fair Value Disclosure [Abstract]    
Accounts receivable - noncurrent 0 0
Liabilities, Fair Value Disclosure [Abstract]    
Non-recourse debt 21,458 20,981
Recourse debt 5,241 4,538
Level 3 [Member] | Estimate of Fair Value Measurement [Member]    
Assets, Fair Value Disclosure [Abstract]    
Accounts receivable - noncurrent [1] 990 171
Liabilities, Fair Value Disclosure [Abstract]    
Non-recourse debt 3,317 2,085
Recourse debt $ 0 $ 0
[1] s of September 30, 2025, the amounts primarily relate to the Mong Duong loan receivable. For both periods presented, amounts also include payment deferrals granted to mining customers as part of our green blend agreements in Chile, the sale of the Redondo Beach land, and the fair value of the Argentine FONINVEMEM receivables. These are included in Loan receivable and Other noncurrent assets in the accompanying Condensed Consolidated Balance Sheets.