XML 83 R63.htm IDEA: XBRL DOCUMENT v3.19.3
REVENUE: - Provisionally prices sales (Details)
lb in Millions, $ in Millions
Sep. 30, 2019
USD ($)
lb
$ / item
Copper  
Provisionally priced sales:  
Provisional price sales adjustment amounts included in accounts receivable and net sales | $ $ 19.9
Copper | July 2019 to November 2019  
Provisionally priced sales:  
Sales volume (in million lbs.) | lb 210.4
Provisional price | $ / item 2.59
Molybdenum  
Provisionally priced sales:  
Provisional price sales adjustment amounts included in accounts receivable and net sales | $ $ 6.0
Molybdenum | July 2019 to September 2019  
Provisionally priced sales:  
Sales volume (in million lbs.) | lb 14.1
Provisional price | $ / item 11.78