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Segment Information
 6 Months Ended
Jun. 30, 2021
Segment Reporting Information, Revenue for Reportable Segment [Abstract]  
Segment Information SEGMENT INFORMATION
Gross profit is the Company’s measure for segment reporting. There were no intersegment sales in the periods presented. Refer to Note 2, Revenue and Contracts with Customers, for additional details on revenue for each segment. The following table presents the Company’s segment information (in millions):

 Three Months Ended
June 30,		Six Months Ended
June 30,
2021202020212020
Revenue
LEU segment:
Separative work units$45.2 $58.6 $83.3 $89.3 
Uranium— 4.8 — 4.8 
Total45.2 63.4 83.3 94.1 
Technical solutions segment17.2 12.3 34.7 26.6 
Total revenue$62.4 $75.7 $118.0 $120.7 
Segment Gross Profit (Loss)
LEU segment$18.2 $44.5 $30.9 $61.9 
Technical solutions segment(1.1)(0.7)(2.1)1.5 
Gross profit$17.1 $43.8 $28.8 $63.4 


Revenue from Major Customers (10% or More of Total Revenue)

In the three months ended June 30, 2021, three customers in the LEU segment represented $14.5 million, $11.2 million and $10.4 million, respectively, of revenue and one customer in the technical solutions segment represented $15.2 million of revenue. In the six months ended June 30, 2021, two customers in the LEU segment represented $28.5 million and $14.5 million, respectively, of revenue and one customer in the technical solutions segment represented $30.8 million of revenue.

In the three months ended June 30, 2020, two customers in the LEU segment represented $32.4 million and $17.9 million, respectively, of revenue and one customer in the technical solutions segment represented $10.1 million of revenue. In the six months ended June 30, 2020, three customers in the LEU segment represented $32.4 million, $23.4 million and $17.9 million, respectively, of revenue and one customer in the technical solutions segment represented $19.9 million of revenue.