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Restructuring and Other Initiatives (Tables)
9 Months Ended
Sep. 30, 2021
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 EndedNine Months Ended
September 30, 2021September 30, 2020September 30, 2021September 30, 2020
Balance at beginning of period$303 $480 $352 $564 
Additions, interest accretion and other157 80 215 334 
Payments(62)(185)(170)(523)
Revisions to estimates and effect of foreign currency(3)(32)(2)(32)
Balance at end of period$395 $343 $395 $343