Segment Information (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2018 USD ($) segment	Sep. 30, 2017 USD ($)
Net Sales, EBIT, Assets continuing operations by reportable segment
Number of reportable segments | segment			4
Revenues	$ 1,181.4	$ 1,002.4	$ 3,402.2	$ 2,760.3
Operating Income (Loss)	140.0	134.8	394.4	370.6
Corporate
Net Sales, EBIT, Assets continuing operations by reportable segment
Operating Income (Loss)	(20.7)	(16.9)	(59.1)	(47.4)
Carlisle Construction Materials
Net Sales, EBIT, Assets continuing operations by reportable segment
Revenues	776.8	640.2	2,204.0	1,717.5
Operating Income (Loss)	120.9	124.4	338.1	334.2
Carlisle Interconnect Technologies
Net Sales, EBIT, Assets continuing operations by reportable segment
Revenues	240.2	210.8	702.2	606.8
Operating Income (Loss)	29.3	25.9	84.0	67.6
Carlisle Fluid Technologies
Net Sales, EBIT, Assets continuing operations by reportable segment
Revenues	72.4	70.9	209.2	202.4
Operating Income (Loss)	11.6	0.1	25.1	12.4
Carlisle Brake & Friction
Net Sales, EBIT, Assets continuing operations by reportable segment
Revenues	92.0	80.5	286.8	233.6
Operating Income (Loss)	(1.1)	1.3	6.3	3.8
Segment total
Net Sales, EBIT, Assets continuing operations by reportable segment
Revenues	1,181.4	1,002.4	3,402.2	2,760.3
Operating Income (Loss)	$ 160.7	$ 151.7	$ 453.5	$ 418.0