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Restructuring (Tables)
12 Months Ended
Dec. 31, 2020
Restructuring and Related Activities [Abstract]  
Restructuring and Related Costs
Restructuring related costs included in Restructuring charges in the Consolidated statement of income / (loss) are as follows:
Years ended December 31,
In millions202020192018
Severance and related costs$(8.9)$(20.9)$(6.5)
Asset impairment (5.0)(6.8)
Other — 0.1 
Total restructuring charges$(8.9)$(25.9)$(13.2)

Other restructuring costs primarily consist of various contract termination and revision costs as well as legal costs.
4.    Restructuring (continued)
Restructuring costs by reportable segment were as follows:
Years ended December 31,
In millions202020192018
Gas Cylinders segment$(7.9)$(20.7)$(9.8)
Elektron segment(0.9)(5.2)(3.4)
Other$(0.1)$— $— 
Total restructuring charges$(8.9)$(25.9)$(13.2)
Schedule of Restructuring Reserve
Activity related to restructuring, recorded in other current liabilities in the consolidated balance sheets is summarized as follows:
In millions20202019
Balance at January 1,$6.5 $5.2 
Costs incurred8.9 20.9 
Cash payments and other(6.4)(19.6)
Balance at December 31,$9.0 $6.5