XML 65 R17.htm IDEA: XBRL DOCUMENT v3.20.4
Properties, Plants, and Equipment, Net
12 Months Ended
Dec. 31, 2020
Property, Plant and Equipment [Abstract]  
Properties, Plants, and Equipment, Net
7. Properties, Plants, and Equipment, Net
The components of net properties, plants and equipment were as follows:
 December  31,
 20202019
 (Dollars in millions)
Coke and energy plant, machinery and equipment$2,009.3 $1,968.2 
Logistics plant, machinery and equipment157.3 147.9 
Land and land improvements104.5 106.0 
Construction-in-progress47.4 29.5 
Other42.4 42.3 
Gross investment, at cost2,360.9 2,293.9 
Less: accumulated depreciation(1,032.9)(903.7)
Total properties, plants and equipment, net$1,328.0 $1,390.2