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Segment Information | 12 Months Ended
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Dec. 31, 2018
Segment Reporting Information, Revenue for Reportable Segment [Abstract] |
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,
| 2018 |  | 2017
United States | $ | 141.3 |  |  | $ | 134.5 |
Foreign: |  |  |
Belgium | 35.2 |  |  | 34.9 |
Japan | 3.1 |  |  | 49.0 |
Other | 13.4 |  |  | — |
Total foreign | 51.7 |  |  | 83.9 |
Total revenue | $ | 193.0 |  |  | $ | 218.4 |
In 2018, the Company’s 10 largest customers represented approximately 85% of total revenue and its three largest customers represented approximately 52% of total revenue. In the Company’s LEU segment, revenue from Florida Power and Light, Synatom, and South Carolina Electric & Gas represented approximately 21%, 18%, 13%, respectively, of total revenue in 2018. In 2017, the Company’s 10 largest customers represented approximately 97% of total revenue and its four largest customers represented approximately 53% of total revenue. In our LEU segment, revenue from Synatom, Entergy, American Electric Power and South Carolina Electric & Gas represented approximately 16%, 14%, 12% and 11%, respectively, of total revenue in 2017. In the Company’s contract services segment, the U.S. government and its contractors represented approximately 12% of total revenue in 2018 and 11% in 2017, respectively. No other customer represented more than 10% of total revenue in 2018 or 2017. Centrus has two reportable segments: the LEU segment with two components, SWU and uranium, and the contract services 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 contract services segment includes revenue and cost of sales for work that Centrus performs under a fixed price agreement as a contractor to UT-Battelle. The contract services 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. There were no intersegment sales in the periods presented. The Company’s revenue and gross profit by segment are as follows (in millions):
| Year Ended December 31,
| 2018 |  | 2017
Revenue |  |  |
LEU segment: |  |  |
Separative work units | $ | 130.6 |  |  | $ | 195.4 |
Uranium | 33.8 |  |  | — |
Total | 164.4 |  |  | 195.4 |
Contract services segment | 28.6 |  |  | 23.0 |
Total revenue | $ | 193.0 |  |  | $ | 218.4 |
Segment Gross Profit (Loss) |  |  |
LEU segment | $ | (23.3 | ) |  | $ | 32.7 |
Contract services segment | 5.4 |  |  | (2.5 | )
Gross profit (loss) | $ | (17.9 | ) |  | $ | 30.2 |
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, 2018, and December 31, 2017.

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- Definition The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -URI http://asc.fasb.org/topic&trid=2134510 + Details
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- References No definition available. + Details
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