Non-Controlling Interest (Schedule of summarized balance sheet) (Details) - USD ($) $ in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|---|---|---|---|
| Assets | |||
| Cash and cash equivalents | $ 568.9 | $ 541.8 | $ 249.8 |
| Trade and other receivables | 377.8 | 235.5 | |
| Inventories - current | 199.2 | 197.4 | |
| Property, plant and equipment | 4,693.9 | 4,181.4 | |
| Other assets | 51.5 | 38.8 | |
| Assets | 6,223.3 | 5,487.6 | |
| Liabilities | |||
| Environmental provisions | 312.6 | 300.8 | |
| Lease liabilities | 56.0 | 74.8 | $ 90.3 |
| Deferred tax liabilities | 375.3 | 340.4 | |
| Liabilities | $ 2,992.3 | 2,840.2 | |
| Copper Mountain Mine [Member] | |||
| Assets | |||
| Cash and cash equivalents | 12.9 | ||
| Trade and other receivables | 44.1 | ||
| Inventories - current | 37.5 | ||
| Property, plant and equipment | 902.9 | ||
| Other assets | 11.1 | ||
| Assets | 1,008.5 | ||
| Liabilities | |||
| Trade and other payables | 37.5 | ||
| Amounts due to related parties | 422.6 | ||
| Environmental provisions | 35.5 | ||
| Lease liabilities | 20.1 | ||
| Deferred tax liabilities | 119.9 | ||
| Other liabilities | 68.9 | ||
| Liabilities | $ 704.5 |
| X | ||||||||||
- Definition The amount of a present economic resource controlled by the entity as a result of past events. Economic resource is a right that has the potential to produce economic benefits. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition The amount of cash on hand and demand deposits, along with short-term, highly liquid investments that are readily convertible to known amounts of cash and that are subject to an insignificant risk of changes in value. [Refer: Cash; Cash equivalents] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition The amounts of income taxes payable in future periods in respect of taxable temporary differences. [Refer: Temporary differences [member]] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition The amount of current inventories. [Refer: Inventories] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition The amount of liabilities related to the entity's leases. Lease is a contract, or part of a contract, that conveys the right to use an underlying asset for a period of time in exchange for consideration. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition The amount of a present obligation of the entity to transfer an economic resource as a result of past events. Economic resource is a right that has the potential to produce economic benefits. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition The amount of assets that the entity does not separately disclose in the same statement or note. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition The amount of liabilities that the entity does not separately disclose in the same statement or note. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition The amount of non-current provisions other than provisions for employee benefits. [Refer: Non-current provisions] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition The amount of tangible assets that: (a) are held for use in the production or supply of goods or services, for rental to others, or for administrative purposes; and (b) are expected to be used during more than one period. Note that right-of-use assets are not included. [Contrast: Property, plant and equipment including right-of-use assets] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition The amount of trade payables and other payables. [Refer: Trade payables; Other payables] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition The amount of payables due to related parties. [Refer: Total for all related parties [member]] Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition The amount of trade receivables and other receivables. [Refer: Trade receivables; Other receivables] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Details
|