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Segment Information
 12 Months Ended
Dec. 31, 2023
Segment Reporting Information, Revenue for Reportable Segment [Abstract]  
Segment Information REVENUE BY GEOGRAPHIC AREA, MAJOR CUSTOMERS AND SEGMENT INFORMATION
Revenue by customer location, including customers in a foreign country representing 10% or more of total revenue, follows (in millions):
Year Ended December 31,
202320222021
United States$281.6 $154.3 $220.5 
Foreign:
Belgium
0.1 38.3 36.6 
Japan
23.6 61.6 34.6 
Other
14.9 39.6 6.6 
Total foreign
38.6 139.5 77.8 
      Total revenue$320.2 $293.8 $298.3 

The U.S. government and its contractors, in the Company’s Technical Solutions segment, represented approximately 16% of total revenue for the year ended December 31, 2023, 20% for the year ended December 31, 2022, and 38% for the year ended December 31, 2021.

The ten largest customers in the Company’s LEU segment represented approximately 79% of total revenue for the year ended December 31, 2023. Revenue from Customer A , Customer B, and Customer C represented approximately 17%, 15%, and 13% respectively, of total revenue for the year ended December 31, 2023.

The ten largest customers in the Company’s LEU segment represented approximately 75% of total revenue for the year ended December 31, 2022. Revenue from Kyushu Electric Power Company and Synatom represented approximately 15% and 13%, respectively, of total revenue for the year ended December 31, 2022.

The ten largest customers in the Company’s LEU segment represented approximately 57% of total revenue for the year ended December 31, 2021. Revenue from Kyushu Electric Power Company and Synatom represented approximately 12% of total revenue for the year ended December 31, 2021.

No other customer represented more than 10% of total revenue for the year ended December 31, 2023, 2022, or 2021.

Centrus has two reportable segments: the LEU segment with two components, SWU and uranium, and the Technical Solutions segment. The LEU segment includes sales of the SWU component of LEU, sales of both the SWU and uranium components of LEU, and sales of uranium. The Technical Solutions segment includes revenue and cost of sales for work that Centrus performs under the HALEU Demonstration and Operation Contracts. The Technical Solutions segment also includes limited services provided by Centrus to DOE and its contractors at the Piketon facility. Gross profit is Centrus’ measure for segment reporting. Net sales of the Company’s business segments in the following tables exclude intersegment sales as these activities are eliminated in consolidation and thus are not included in management’s evaluation of performance of each segment. Sales between segments are recorded at market prices at the time of the sale. Such intercompany operating income is eliminated in consolidation, so that the company’s total sales and total operating income reflect only those transactions with external customers. Refer to Note 1, Summary of Significant Accounting Policies, and 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):
 Year Ended December 31,
202320222021
Revenue
LEU segment:
Separative work units$208.2 $196.2 $163.3 
Uranium60.8 39.4 22.8 
Intersegment revenue, eliminated on consolidation
5.0 — — 
Total274.0 235.6 186.1 
Technical Solutions segment51.2 58.2 112.2 
Total revenue325.2 293.8 298.3 
Elimination of intersegment revenue
(5.0)— — 
Total revenue
$320.2 $293.8 $298.3 
Segment Gross Profit (Loss)
LEU segment:
LEU segment$105.1 $130.6 $73.0 
Intersegment gross profit, eliminated on consolidation
2.0 — — 
Total107.1 130.6 73.0 
Technical Solutions segment:
Technical Solutions segment7.0 (12.7)41.5 
Intersegment gross profit, eliminated on consolidation
3.0 
Total10.0 (12.7)41.5 
Elimination of intersegment gross profit
(5.0)— — 
Gross profit$112.1 $117.9 $114.5 

The Company’s total assets are not presented for each reportable segment as they are not reviewed by, nor otherwise regularly provided to the chief operating decision maker. Centrus’ long-term or long-lived assets, which include property, plant and equipment and other assets reported on the Consolidated Balance Sheet, were located in the United States as of December 31, 2023, and December 31, 2022.