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Special Charges Special Charges (Tables)
 6 Months Ended
Jun. 30, 2018
Restructuring and Related Activities [Abstract]  
Restructuring and Related Costs
A summary of termination benefit activity and related liabilities follows. Based on current expectations of required employee levels, the remaining balance of $3.3 million related to the Piketon facility is classified in Other Long-Term Liabilities in the condensed consolidated balance sheet and is expected to be paid in the third quarter of 2019.
(in millions)
 
Liability
December 31,
2017
 
Six Months Ended
June 30, 2018
 
Liability
June 30,
2018
 
 
 
Charges for Termination Benefits
 
Paid/Settled
 
Workforce reductions:
 
 
 
 
 
 
 
 
Evolving business needs
 
$
0.8

 
$
0.7

 
$
(1.1
)
 
$
0.4

Piketon demonstration facility
 
5.7

 
0.1

 
(2.5
)
 
3.3

 
 
$
6.5

 
$
0.8

 
$
(3.6
)
 
$
3.7