Advanced Technology Costs and Other Income	12 Months Ended
Advanced Technology Costs and Other Income	Dec. 31, 2015
Research and Development [Abstract]
Advanced Technology Costs and Other Income	ADVANCED TECHNOLOGY COSTS AND OTHER INCOME From June 2012 through April 2014, the Company performed work under the June 2012 cooperative agreement with DOE (the “Cooperative Agreement”) for the American Centrifuge technology with DOE providing cost-share funding. The Cooperative Agreement expired in accordance with its terms on April 30, 2014. In 2014, advanced technology costs included costs for work performed under the Cooperative Agreement and DOE’s cost share was recognized as other income. Revenue and cost of sales for work that Centrus performed from May 2014 to September 2015 as a contractor to UT-Battelle are reported in the contract services segment. American Centrifuge costs incurred by the Company that were outside of the UT-Battelle contract are included in advanced technology costs, including certain demobilization and maintenance costs. Such costs totaled $18.5 million in 2015, $4.7 million in the three months ended December 31, 2014 and $12.3 million in the nine months ended September 30, 2014. Although the Company’s contract with UT-Battelle expired September 30, 2015, the Centrus continued to perform work of similar scope in the fourth quarter of 2015 as the parties worked toward a successor agreement. Costs for such work totaled $7.7 million and are included in advanced technology costs. Advanced technology costs in 2015 included $6.8 million for an increase to the liability for the decontamination and decommissioning (“D&D”) of the Piketon facility based on updated cost projections.

The entire disclosure for research, development, and computer software activities, including contracts and arrangements to be performed for others and with federal government. Includes costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility and in-process research and development acquired in a business combination consummated during the period.