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Special Charges Special Charges (Tables) | 12 Months Ended
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Dec. 31, 2018
Restructuring and Related Activities [Abstract] |
Restructuring and Related Costs | A summary of termination benefit activity an d related liabilities follows (in millions):
| Liability Dec. 31, 2016 |  | 2017 |  | Liability Dec. 31, 2017 |  | 2018 |  | Liability Dec. 31, 2018
|  | Charges for Termination Benefits |  | Paid/ Settled |  |  | Charges for Termination Benefits |  | Paid/ Settled |
Workforce reductions: |  |  |  |  |  |  |  |  |  |  |  |  |
Evolving business needs | $ | 0.1 |  |  | $ | 2.4 |  |  | $ | (1.7 | ) |  | $ | 0.8 |  |  | $ | 2.1 |  |  | $ | (2.0 | ) |  | $ | 0.9 |
Piketon demonstration facility | 5.4 |  |  | 1.1 |  |  | (0.8 | ) |  | 5.7 |  |  | 0.1 |  |  | (2.6 | ) |  | 3.2 |
Total | $ | 5.5 |  |  | $ | 3.5 |  |  | $ | (2.5 | ) |  | $ | 6.5 |  |  | $ | 2.2 |  |  | $ | (4.6 | ) |  | $ | 4.1 |

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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://fasb.org/us-gaap/role/ref/legacyRef -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=115931487&loc=d3e140864-122747 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -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 3: http://fasb.org/us-gaap/role/ref/legacyRef -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=115931487&loc=d3e140904-122747 + Details
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