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v3.19.1

Segment Information (Segment Reporting Information) (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | $ 193.0 | $ 218.4
Gross Profit | $ (9.7) | $ 7.8 | $ (10.4) | $ (5.6) | $ 26.5 | $ 11.3 | $ (4.7) | $ (2.9) | (17.9) | 30.2
Low Enriched Uranium Segment [Member] |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 164.4 | 195.4
Gross Profit |  |  |  |  |  |  |  |  | (23.3) | 32.7
Contract Services Segment [Member] |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |
Gross Profit |  |  |  |  |  |  |  |  | 5.4 | (2.5)
Separative Work Units [Member] |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 130.6 | 195.4
Uranium [Member] |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 33.8 | 0.0
Service [Member] |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | $ 28.6 | $ 23.0

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