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Restructuring Expenses and Repositioning Expenses
 9 Months Ended
Sep. 30, 2017
Restructuring and Related Activities [Abstract]  
Restructuring Expenses and Repositioning Expenses
Restructuring Expenses    In the 2017 third quarter, Grace incurred costs from restructuring actions, primarily related to workforce reductions as a result of changes in the business environment and its business structure, which are included in "restructuring and repositioning expenses" in the Consolidated Statements of Operations. Costs in the nine months ended September 30, 2016, primarily related to the exit of certain non-strategic product lines in the Materials Technologies reportable segment in the first half of 2016.
The following table presents restructuring expenses by reportable segment for the three and nine months ended September 30, 2017.
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
(In millions)
2017
 
2016
 
2017
 
2016
Catalysts Technologies
$
2.4

 
$
1.6

 
$
2.8

 
$
2.7

Materials Technologies
0.2

 
(0.1
)
 
0.5

 
15.1

Corporate
2.7

 
0.3

 
6.8

 
0.4

Total restructuring expenses
$
5.3

 
$
1.8

 
$
10.1

 
$
18.2


These costs are not included in segment operating income. Substantially all costs related to the restructuring programs are expected to be paid by September 30, 2018.
The following table presents components of the change in restructuring liability from December 31, 2016, to September 30, 2017.
Restructuring Liability
(In millions)
Total
Balance, December 31, 2016
$
9.6

Accruals for severance and other costs
9.5

Payments
(10.9
)
Currency translation adjustments and other
0.1

Balance, September 30, 2017
$
8.3


Repositioning Expenses    Pretax repositioning expenses included in continuing operations for the three and nine months ended September 30, 2017, were $4.0 million and $6.9 million, respectively, compared with $3.8 million and $10.4 million for the corresponding prior-year periods. The expenses incurred in 2017 primarily relate to third-party consulting costs related to productivity initiatives. Substantially all of these costs have been or are expected to be settled in cash.