Goodwill and Other Intangible Assets, net - Changes in the Carrying Amount of Goodwill (Details) $ in Millions	9 Months Ended
	Sep. 30, 2020 USD ($) business	Dec. 31, 2016 USD ($)
Changes in the carrying amount of goodwill
Goodwill, Balance at the beginning of the period	$ 1,716.3
Goodwill acquired during the year	18.1
Measurement period adjustments	(6.8)
Currency translation and other	(0.3)
Goodwill, Balance at the end of the period	$ 1,727.3
Number of Businesses Acquired | business	2
Total consideration	$ 36.5
Carlisle Construction Materials
Changes in the carrying amount of goodwill
Goodwill, Balance at the beginning of the period	597.1
Goodwill acquired during the year	12.5
Measurement period adjustments	0.0
Currency translation and other	1.3
Goodwill, Balance at the end of the period	610.9
Carlisle Interconnect Technologies
Changes in the carrying amount of goodwill
Goodwill, Balance at the beginning of the period	835.2
Goodwill acquired during the year	2.8
Measurement period adjustments	(6.8)
Currency translation and other	(1.9)
Goodwill, Balance at the end of the period	829.3
Carlisle Fluid Technologies
Changes in the carrying amount of goodwill
Goodwill, Balance at the beginning of the period	187.5
Goodwill acquired during the year	2.8
Measurement period adjustments	0.0
Currency translation and other	0.3
Goodwill, Balance at the end of the period	190.6
Carlisle Brake & Friction
Changes in the carrying amount of goodwill
Goodwill, Balance at the beginning of the period	96.5
Goodwill acquired during the year	0.0
Measurement period adjustments	0.0
Currency translation and other	0.0
Goodwill, Balance at the end of the period	$ 96.5
Goodwill, accumulated impairment loss		$ 130.0