Exit and Disposal Activities - Exit and Disposal Activity Liability (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Restructuring Reserve [Roll Forward]
Balance, beginning	$ 13.1
Charges	3.1	$ 3.2
Cash payments	(7.1)
Other adjustments and non-cash settlements	(1.0)
Balance, ending	8.1
Carlisle Interconnect Technologies
Restructuring Reserve [Roll Forward]
Balance, beginning	4.9
Charges	1.1	2.3
Cash payments	(2.5)
Other adjustments and non-cash settlements	(0.2)
Balance, ending	3.3
Carlisle Fluid Technologies
Restructuring Reserve [Roll Forward]
Balance, beginning	6.7
Charges	0.0	0.5
Cash payments	(3.6)
Other adjustments and non-cash settlements	0.0
Balance, ending	3.1
Carlisle Brake & Friction
Restructuring Reserve [Roll Forward]
Balance, beginning	1.5
Charges	2.0	0.3
Cash payments	(1.0)
Other adjustments and non-cash settlements	(0.8)
Balance, ending	1.7
Corporate
Restructuring Reserve [Roll Forward]
Charges	$ 0.0	$ 0.1