Goodwill and Other Intangible Assets, net - Changes in the Carrying Amount of Goodwill (Details) $ in Millions	9 Months Ended
Sep. 30, 2021 USD ($)
Changes in the carrying amount of goodwill
Goodwill, Balance at the beginning of the period	$ 1,641.7
Goodwill acquired during the year	903.0
Measurement period adjustments	(0.2)
Currency translation and other	(5.0)
Goodwill, Balance at the end of the period	2,539.5
Carlisle Construction Materials
Changes in the carrying amount of goodwill
Goodwill, Balance at the beginning of the period	613.0
Goodwill acquired during the year	903.0
Measurement period adjustments	0.0
Currency translation and other	(2.9)
Goodwill, Balance at the end of the period	1,513.1
Carlisle Interconnect Technologies
Changes in the carrying amount of goodwill
Goodwill, Balance at the beginning of the period	835.6
Goodwill acquired during the year	0.0
Measurement period adjustments	0.0
Currency translation and other	(0.4)
Goodwill, Balance at the end of the period	835.2
Carlisle Fluid Technologies
Changes in the carrying amount of goodwill
Goodwill, Balance at the beginning of the period	193.1
Goodwill acquired during the year	0.0
Measurement period adjustments	(0.2)
Currency translation and other	(1.7)
Goodwill, Balance at the end of the period	$ 191.2

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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