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Goodwill and Other Intangible Assets, net - Changes in the Carrying Amount of Goodwill (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Sep. 30, 2016
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Changes in the carrying amount of goodwill        
Goodwill, Balance at the beginning of the period   $ 1,452.1 $ 1,020.9  
Goodwill acquired during the year   5.5 420.2  
Measurement period adjustments   (12.0) 0.3  
Currency translation and other   (3.8) 10.7  
Goodwill, Balance at the end of the period   1,441.8 1,452.1  
Indefinite-lived Intangible Assets (Excluding Goodwill) [Abstract]        
Acquisition price   20.1    
Carlisle Construction Materials        
Changes in the carrying amount of goodwill        
Goodwill, Balance at the beginning of the period   544.3 117.5  
Goodwill acquired during the year   2.8 420.2  
Measurement period adjustments   (12.0)    
Currency translation and other   (2.3) 6.6  
Goodwill, Balance at the end of the period   532.8 544.3  
Carlisle Interconnect Technologies        
Changes in the carrying amount of goodwill        
Goodwill, Balance at the beginning of the period   640.3 639.1  
Goodwill acquired during the year   2.7    
Measurement period adjustments     0.3  
Currency translation and other   0.1 0.9  
Goodwill, Balance at the end of the period   643.1 640.3  
Carlisle Fluid Technologies        
Changes in the carrying amount of goodwill        
Goodwill, Balance at the beginning of the period   171.0 167.9  
Currency translation and other   (1.5) 3.1  
Goodwill, Balance at the end of the period   169.5 171.0  
Carlisle Brake & Friction        
Changes in the carrying amount of goodwill        
Goodwill, Balance at the beginning of the period   96.5 96.4  
Currency translation and other   (0.1) 0.1  
Goodwill, Balance at the end of the period $ 96.5 96.4 96.5  
Impairment charges (130.0)      
Carlisle Food Service Products        
Goodwill        
Goodwill reclassified to discontinued operations     149.7 $ 60.3
Other intangible assets, net, allocated to discontinued operations     169.4 $ 24.9
Trade names        
Indefinite-lived Intangible Assets (Excluding Goodwill) [Abstract]        
CBF Wellman   $ 243.1 $ 244.1  
Wellman Trade Name | Carlisle Brake & Friction        
Indefinite-lived Intangible Assets (Excluding Goodwill) [Abstract]        
CBF Wellman 35.4      
Trade name, impairment charge $ 11.5