XML 127 R86.htm IDEA: XBRL DOCUMENT v3.24.1
Financial Instruments - Derivative Gains and Losses (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Gains (losses) on change in fair value of derivatives $ 0.6 $ 5.3
Zinc gains    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Gains (losses) on change in fair value of derivatives 0.0 1.7
Diesel gains    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Gains (losses) on change in fair value of derivatives 0.0 4.5
Other    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Gains (losses) on change in fair value of derivatives $ 0.6 $ (0.9)