Goodwill and Other Intangible Assets, net - Net Carrying Value of Other Intangibles (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Net book value of other intangible assets by the reportable segment
Other intangible assets, net	$ 993.5	$ 1,065.0
Carlisle Construction Materials
Net book value of other intangible assets by the reportable segment
Other intangible assets, net	296.4	325.1
Carlisle Interconnect Technologies
Net book value of other intangible assets by the reportable segment
Other intangible assets, net	322.5	344.5
Carlisle Fluid Technologies
Net book value of other intangible assets by the reportable segment
Other intangible assets, net	286.1	302.5
Carlisle Brake & Friction
Net book value of other intangible assets by the reportable segment
Other intangible assets, net	88.2	92.9
Corporate
Net book value of other intangible assets by the reportable segment
Other intangible assets, net	$ 0.3	$ 0.0