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Restructuring and Related Charges - Narrative (Details) - USD ($)
$ in Millions
Sep. 30, 2020
Dec. 31, 2018
Sep. 30, 2018
Restructuring Cost and Reserve [Line Items]      
Future costs to be incurred $ 31.0    
Global Productivity Improvement Plan      
Restructuring Cost and Reserve [Line Items]      
Expected restructuring and related charges 132.5    
Future costs to be incurred $ 31.0    
HHI Distribution Center Consolidation      
Restructuring Cost and Reserve [Line Items]      
Expected restructuring and related charges   $ 81.7  
GPC Rightsizing Initiative      
Restructuring Cost and Reserve [Line Items]      
Expected restructuring and related charges     $ 20.3