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Restructuring and Impairment Activities (Tables)
9 Months Ended
Sep. 30, 2021
Restructuring and Related Activities [Abstract]  
Changes in Restructuring Liabilities The following table summarizes total restructuring and related charges for the three and nine months ended September 30, 2021 and 2020:
Three Months EndedNine Months Ended
September 30, 2021September 30, 2020September 30, 2021September 30, 2020
Restructuring and impairment expense:
Severance$1.2 $5.7 $2.8 $7.4 
Other0.7 0.3 3.1 0.3 
Total restructuring and impairment expense$1.9 $6.0 $5.9 $7.7 
Other restructuring related charges - Cost of products sold
Accelerated depreciation and amortization$0.1 $1.2 $0.1 $1.2 
Spare parts and inventory write-downs to estimated net realizable value$0.4 $2.0 $0.4 $2.0 
Total other restructuring related charges - Cost of products sold$0.5 $3.2 $0.5 $3.2 
Total restructuring costs and related charges$2.4 $9.2 $6.4 $10.9 

The following table summarizes changes in restructuring liabilities during the periods ended September 30, 2021 and 2020. ($ in millions):
Nine Months Ended
September 30, 2021September 30, 2020
Balance at beginning of year$7.4 $0.5 
Accruals for announced programs2.8 7.7 
Cash payments(4.8)(1.3)
Foreign exchange impact(0.1)— 
Balance at end of period$5.3 $6.9