Exit and Disposal and Other Restructuring Activities - Components of Exit and Disposal Activities (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Restructuring Cost and Reserve [Line Items]
Employee severance and benefit arrangements	$ 3.2	$ 5.7	$ 5.1	$ 6.0
Relocation costs	0.2	0.1	0.3	0.3
Accelerated depreciation	2.1	0.4	2.1	0.4
Facility cleanup costs	0.0	0.0	(1.0)	0.8
Other restructuring costs	1.1	0.7	1.5	1.4
Total exit and disposal costs	6.6	6.9	8.0	8.9
Cost of goods sold
Restructuring Cost and Reserve [Line Items]
Total exit and disposal costs	3.6	4.0	4.4	5.7
Selling and administrative expenses
Restructuring Cost and Reserve [Line Items]
Total exit and disposal costs	2.8	2.7	3.4	2.8
Research and development expenses
Restructuring Cost and Reserve [Line Items]
Total exit and disposal costs	0.2	0.0	0.2	0.0
Other operating expense, net
Restructuring Cost and Reserve [Line Items]
Total exit and disposal costs	0.0	0.2	0.0	0.4
Carlisle Interconnect Technologies
Restructuring Cost and Reserve [Line Items]
Total exit and disposal costs	6.6	4.6	7.9	6.5
Carlisle Fluid Technologies
Restructuring Cost and Reserve [Line Items]
Total exit and disposal costs	0.0	2.1	0.1	2.1
Carlisle Construction Materials
Restructuring Cost and Reserve [Line Items]
Total exit and disposal costs	$ 0.0	$ 0.2	$ 0.0	$ 0.3