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Restructuring Charges (Tables)
12 Months Ended
Dec. 31, 2020
Restructuring Charges [Abstract]  
Schedule of restructuring charges The following reflects our restructuring activity (in millions):
Balance at December 31, 2017$21.4 
Additional charges21.0 
Payments(18.8)
Non-cash adjustments0.4 
Balance at December 31, 201824.0 
Additional charges25.3 
Payments(29.4)
Non-cash adjustments(0.3)
Balance at December 31, 201919.6 
Additional charges3.5 
Payments(14.3)
Non-cash adjustments0.7 
Balance at December 31, 2020$9.5