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Goodwill and Other Intangible Assets, net - Changes in the Carrying Amount of Goodwill (Details)
$ in Millions
3 Months Ended 12 Months Ended
Sep. 30, 2017
USD ($)
Dec. 31, 2019
USD ($)
business
Dec. 31, 2018
USD ($)
business
Changes in the carrying amount of goodwill      
Goodwill, Balance at the beginning of the period   $ 1,441.8 $ 1,452.1
Goodwill acquired during the year   274.5 5.5
Measurement period adjustments   0.2 (12.0)
Currency translation and other   (0.2) (3.8)
Goodwill, Balance at the end of the period   $ 1,716.3 $ 1,441.8
Number of businesses acquired | business   5 3
Acquisition price   $ 42.4 $ 20.1
Carlisle Construction Materials      
Changes in the carrying amount of goodwill      
Goodwill, Balance at the beginning of the period   532.8 544.3
Goodwill acquired during the year   64.3 2.8
Measurement period adjustments   0.5 (12.0)
Currency translation and other   (0.5) (2.3)
Goodwill, Balance at the end of the period   597.1 532.8
Carlisle Interconnect Technologies      
Changes in the carrying amount of goodwill      
Goodwill, Balance at the beginning of the period   643.1 640.3
Goodwill acquired during the year   194.1 2.7
Measurement period adjustments   (1.9) 0.0
Currency translation and other   (0.1) 0.1
Goodwill, Balance at the end of the period   835.2 643.1
Carlisle Fluid Technologies      
Changes in the carrying amount of goodwill      
Goodwill, Balance at the beginning of the period   169.5 171.0
Goodwill acquired during the year   16.1  
Measurement period adjustments   1.6  
Currency translation and other   0.3 (1.5)
Goodwill, Balance at the end of the period   187.5 169.5
Carlisle Brake & Friction      
Changes in the carrying amount of goodwill      
Goodwill, Balance at the beginning of the period   96.4 96.5
Currency translation and other   0.1 (0.1)
Goodwill, Balance at the end of the period   $ 96.5 $ 96.4
Impairment charges $ (130.0)