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Special Charges Special Charges (Tables) | 12 Months Ended
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Dec. 31, 2016
Restructuring and Related Activities [Abstract] |
Special Charges Summary [Table Text Block] | A summary of termination benefit activity and related liabilities follows (in millions):
| Liability Dec. 31, 2014 |  | 2015 |  | Liability Dec. 31, 2015 |  | 2016 |  | Liability Dec. 31, 2016 |
|  | Special Charges |  | Paid |  |  | Special Charges |  | Paid |  |
Workforce reductions: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Enrichment cessation and evolving business needs | $ | 2.4 |  |  | $ | 4.5 |  | (a) | $ | (6.6 | ) | (a) | $ | 0.3 |  |  | $ | 0.3 |  |  | $ | (0.5 | ) |  | $ | 0.1 |  |
Piketon demonstration facility | — |  |  | 8.7 |  |  | (0.3 | ) |  | 8.4 |  |  | 0.1 |  |  | (3.1 | ) |  | 5.4 |  | (b)
| $ | 2.4 |  |  | $ | 13.2 |  |  | $ | (6.9 | ) |  | $ | 8.7 |  |  | $ | 0.4 |  |  | $ | (3.6 | ) |  | $ | 5.5 |  |
(a) Net of $0.4 million billed to and paid by DOE. (b) Includes $2.1 million included in long-term liabilities.

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- Definition Tabular disclosure of costs incurred for restructuring including, but not limited to, exit and disposal activities, remediation, implementation, integration, asset impairment, and charges against earnings from the write-down of assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 5.P.3) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140864-122747 + Details
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