Annual report pursuant to Section 13 and 15(d)

Nature of Operations - Property, Plant and Equipment (Details)

v3.20.4
Nature of Operations - Property, Plant and Equipment (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Revenues from External Customers and Long-Lived Assets [Line Items]    
Net property, plant and equipment $ 246.9 $ 277.2
United States    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Net property, plant and equipment 160.4 192.3
China    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Net property, plant and equipment 73.5 72.7
AUSTRALIA    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Net property, plant and equipment $ 13.0 $ 12.2