Annual report pursuant to Section 13 and 15(d)

Industry Segments - Narrative (Details)

v3.19.3.a.u2
Industry Segments - Narrative (Details)
12 Months Ended
Dec. 31, 2019
reporting_unit
segments
Segment Reporting Information [Line Items]  
Number of operating segments | segments 2
Number of reportable segments | segments 2
Metals Segment  
Segment Reporting Information [Line Items]  
Number of reporting units | reporting_unit 3
Specialty Chemicals Segment  
Segment Reporting Information [Line Items]  
Number of reporting units | reporting_unit 1