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Restructuring and Other Initiatives (Tables)
 3 Months Ended
Mar. 31, 2018
Restructuring and Related Activities [Abstract]  
Schedule of Restructuring Reserves and Charges
The following table summarizes the reserves and charges related to restructuring and other initiatives, including postemployment benefit reserves and charges:


Three Months Ended

March 31, 2018

March 31, 2017
Balance at beginning of period
$
227


$
268

Additions, interest accretion and other
455


40

Payments
(37
)

(22
)
Revisions to estimates and effect of foreign currency
(12
)

10

Balance at end of period
$
633


$
296