XML 119 R100.htm IDEA: XBRL DOCUMENT v3.8.0.1
Inventories (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Classes of current inventories [abstract]      
Raw materials and consumables $ 31.0 $ 28.3  
Work in progress 28.1 30.5  
Finished goods and goods for resale 23.1 23.7  
Inventories 82.2 82.5  
Provision for obsolete and excess inventories 8.4 6.5  
Cost of inventories recognized as expense 282.9 287.3 $ 316.2
Inventory written-off $ 1.6 $ 0.1