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Fair Value (Instruments Not Measured at Fair Value) (Details) - USD ($) $ in Millions | Sep. 30, 2025 | Dec. 31, 2024
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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.

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- Definition The non-current portion of the entity's non-recourse debt. Non-recourse debt is secured by the capital stock, physical assets, contracts and cash flows of the related subsidiary. The risk is limited to the respective subsidiary business and is without recourse to the Parent Company and other subsidiaries. + References No definition available. + Details
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- Definition Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as noncurrent. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481990/310-10-45-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(9)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 + Details
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