Segment Information (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($) business	Jun. 30, 2019 USD ($)
Net Sales, EBIT, Assets continuing operations by reportable segment
Number of reportable segments | business			4
Revenues	$ 1,024.2	$ 1,314.8	$ 2,054.4	$ 2,386.7
Operating Income (Loss)	113.4	207.2	216.1	321.9
Corporate and unallocated
Net Sales, EBIT, Assets continuing operations by reportable segment
Revenues	0.0	0.0	0.0	0.0
Operating Income (Loss)	(15.9)	(22.8)	(36.3)	(44.5)
Carlisle Construction Materials | Operating segments
Net Sales, EBIT, Assets continuing operations by reportable segment
Revenues	734.9	915.0	1,411.3	1,586.1
Operating Income (Loss)	137.6	182.5	245.3	275.4
Carlisle Interconnect Technologies | Operating segments
Net Sales, EBIT, Assets continuing operations by reportable segment
Revenues	184.0	245.4	408.5	491.8
Operating Income (Loss)	(1.5)	35.9	14.9	66.5
Carlisle Fluid Technologies | Operating segments
Net Sales, EBIT, Assets continuing operations by reportable segment
Revenues	46.5	67.3	104.8	130.4
Operating Income (Loss)	(5.2)	3.3	(2.4)	9.7
Carlisle Brake & Friction | Operating segments
Net Sales, EBIT, Assets continuing operations by reportable segment
Revenues	58.8	87.1	129.8	178.4
Operating Income (Loss)	(1.6)	8.3	(5.4)	14.8
Operating segments
Net Sales, EBIT, Assets continuing operations by reportable segment
Revenues	1,024.2	1,314.8	2,054.4	2,386.7
Operating Income (Loss)	$ 129.3	$ 230.0	$ 252.4	$ 366.4