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Restructuring Expenses and Repositioning Expenses (Tables)
 12 Months Ended
Dec. 31, 2018
Restructuring and Related Activities [Abstract]  
Schedule of restructuring expenses and related asset impairments
The following table presents restructuring expenses by reportable segment for the years ended December 31, 2018, 2017, and 2016.
 
Year Ended December 31,
(In millions)
2018
 
2017
 
2016
Catalysts Technologies
$
13.7

 
$
3.7

 
$
3.4

Materials Technologies
0.5

 
(0.1
)
 
15.1

Corporate
(0.2
)
 
7.9

 
5.8

Total restructuring expenses
$
14.0

 
$
11.5

 
$
24.3
Schedule of restructuring liability
The following table presents components of the change in the restructuring liability for the years ended December 31, 2018, 2017, and 2016:
(In millions)
Total
Balance, December 31, 2015
$
7.6

Accruals for severance and other costs
17.8

Payments
(16.0
)
Currency translation adjustments and other
0.2

Balance, December 31, 2016
$
9.6

Accruals for severance and other costs
11.4

Payments
(14.4
)
Currency translation adjustments and other
0.1

Balance, December 31, 2017
$
6.7

Accruals for severance and other costs
10.1

Payments
(6.1
)
Balance, December 31, 2018
$
10.7