Advanced Technology Costs and Other Income	9 Months Ended
Advanced Technology Costs and Other Income	Sep. 30, 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 for up to 80% for a total government cost share of $280 million. The Cooperative Agreement expired in accordance with its terms on April 30, 2014. For the three and nine months ended September 30, 2014, advanced technology costs included costs for work performed under the Cooperative Agreement and DOE’s cost share was recognized as other income. On May 1, 2014, the Company signed an agreement for continued research, development and demonstration of the American Centrifuge technology in furtherance of DOE’s national security objectives (the “American Centrifuge Technology Demonstration and Operations Agreement”, or “ACTDO Agreement”) with UT-Battelle, LLC (“UT-Battelle”), the management and operating contractor for ORNL. Revenue and cost of sales for work that Centrus performed under the fixed-price ACTDO Agreement as a subcontractor to UT-Battelle are reported in the contract services segment. Refer to Note 13, Commitments and Contingencies - American Centrifuge, regarding the status of project funding after September 2015. American Centrifuge costs incurred by the Company that are outside of the ACTDO Agreement are included in advanced technology costs, including certain demobilization and maintenance costs. Such costs totaled $1.9 million in the three months and $7.7 million in the nine months ended September 30, 2015, and $5.3 million in the three months and $12.3 million in the nine months ended September 30, 2014.

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.