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Segment Information (Tables) | 12 Months Ended
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Dec. 31, 2018
Segment Reporting Information, Revenue for Reportable Segment [Abstract] |
Revenue from External Customers by Geographic Areas | The following table presents revenue from SWU and uranium sales disaggregated by geographical region based on the billing addresses of customers (in millions):
| Year Ended December 31,
| 2018 |  | 2017
United States | $ | 112.7 |  |  | $ | 111.5 |
Foreign: |  |  |
Belgium | 35.2 |  |  | 34.9 |
Japan | 3.1 |  |  | 49.0 |
Other | 13.4 |  |  | — |
Revenue - SWU and uranium | $ | 164.4 |  |  | $ | 195.4 |
The following table presents revenue from SWU and uranium sales disaggregated by geographical region based on the billing addresses of customers (in millions):
| Year Ended December 31,
| 2018 |  | 2017
United States | $ | 112.7 |  |  | $ | 111.5 |
Foreign: |  |  |
Belgium | 35.2 |  |  | 34.9 |
Japan | 3.1 |  |  | 49.0 |
Other | 13.4 |  |  | — |
Revenue - SWU and uranium | $ | 164.4 |  |  | $ | 195.4 |
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 |
Segment Reporting Information |
| 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 Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8813-108599 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8721-108599 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8906-108599 + Details
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