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Asset Retirement Obligations - Narrative (Details) $ in Millions	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)
Asset Retirement Obligation [Line Items]
Environmental rehabilitation trust assets	$ 19	$ 16
Minimum | Mines
Asset Retirement Obligation [Line Items]
Estimated useful life (in years)	1 year
Minimum | Other
Asset Retirement Obligation [Line Items]
Estimated useful life (in years)	3 years
Minimum | Measurement Input, Discount Rate
Asset Retirement Obligation [Line Items]
Measurement input in determining asset retirement obligation (in percent)	0.016
Minimum | Measurement Input, Risk Free Interest Rate
Asset Retirement Obligation [Line Items]
Measurement input in determining asset retirement obligation (in percent)	0.050
Maximum | Mines
Asset Retirement Obligation [Line Items]
Estimated useful life (in years)	45 years
Maximum | Other
Asset Retirement Obligation [Line Items]
Estimated useful life (in years)	42 years
Maximum | Measurement Input, Discount Rate
Asset Retirement Obligation [Line Items]
Measurement input in determining asset retirement obligation (in percent)	0.055
Maximum | Measurement Input, Risk Free Interest Rate
Asset Retirement Obligation [Line Items]
Measurement input in determining asset retirement obligation (in percent)	0.201

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Value of input used to measure alternative investment.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)(i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 4: http://www.xbrl.org/2003/role/exampleRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 103
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482078/820-10-55-103

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- Definition

Amount of costs recognized in the balance sheet for known or estimated future costs arising from requirements to perform activities to remediate one or more sites.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 410
-SubTopic 30
-Name Accounting Standards Codification
-Section 25
-Paragraph 18
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482049/410-30-25-18

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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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