XML 72 R49.htm IDEA: XBRL DOCUMENT v3.22.0.1
Other current assets (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Subclassifications of assets, liabilities and equities [abstract]    
Prepaid assets $ 10.9 $ 17.1
Advances on capital projects 9.8 4.5
Derivative assets (note 17) 3.5 4.4
Other current assets $ 24.2 $ 26.0