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Segment Information (Tables)
9 Months Ended
Sep. 30, 2021
Segment Reporting Information, Revenue for Reportable Segment [Abstract]  
Revenue from External Customers by Geographic Areas
The following table presents revenue from separative work units (“SWU”) and uranium sales disaggregated by geographical region based on the billing addresses of customers (in millions):

Three Months Ended September 30,Nine Months Ended September 30,
2021202020212020
United States$13.8 $18.7 $68.6 $66.7 
Foreign 18.2 — 46.7 46.1 
Revenue - SWU and uranium$32.0 $18.7 $115.3 $112.8 
Segment Reporting Information The following table presents the Company’s segment information (in millions):
 Three Months Ended
September 30,
Nine Months Ended
September 30,
2021202020212020
Revenue
LEU segment:
Separative work units$19.1 $0.1 $102.4 $89.4 
Uranium12.9 18.6 12.9 23.4 
Total32.0 18.7 115.3 112.8 
Technical solutions segment59.3 14.9 94.0 41.5 
Total revenue$91.3 $33.6 $209.3 $154.3 
Segment Gross Profit (Loss)
LEU segment$8.3 $(0.9)$39.2 $61.0 
Technical solutions segment41.2 0.1 39.1 1.6 
Gross profit$49.5 $(0.8)$78.3 $62.6