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Restructuring and Impairment Activities (Tables)
3 Months Ended
Mar. 31, 2021
Restructuring and Related Activities [Abstract]  
Changes in Restructuring Liabilities
The following table summarizes total restructuring and related charges for the three months ended March 31, 2021:

Three Months Ended
March 31, 2021March 31, 2020
Restructuring and impairment expense:
Severance$0.3 $0.1 
Other1.4 — 
Total restructuring and impairment expense$1.7 $0.1 

The following table summarizes changes in restructuring liabilities during the periods ended March 31, 2021 and December 31, 2020. ($ in millions):

Three Months Ended
March 31, 2021March 31, 2020
Balance at beginning of year$7.4 $0.5 
Accruals for announced programs0.3 0.1 
Cash payments(2.2)(0.3)
Foreign exchange impact(0.1)— 
Balance at end of period$5.4 $0.3