v3.26.1
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