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Exit and Disposal Activities - Exit and Disposal Activity Liability (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Restructuring Reserve [Roll Forward]
Balance, beginning			$ 13.1
Charges	$ 4.1	$ 11.6	11.8	$ 19.8
Cash payments			(19.5)
Other adjustments and non-cash settlements			(2.7)
Balance, ending	2.7		2.7
Carlisle Interconnect Technologies
Restructuring Reserve [Roll Forward]
Balance, beginning			4.9
Charges	0.6	2.7	2.5	7.5
Cash payments			(5.9)
Other adjustments and non-cash settlements			(1.2)
Balance, ending	0.3		0.3
Carlisle Fluid Technologies
Restructuring Reserve [Roll Forward]
Balance, beginning			6.7
Charges	0.3	7.5	0.8	8.5
Cash payments			(6.9)
Other adjustments and non-cash settlements			0.0
Balance, ending	0.6		0.6
Carlisle Brake & Friction
Restructuring Reserve [Roll Forward]
Balance, beginning			1.5
Charges	3.2	1.0	8.5	3.0
Cash payments			(6.7)
Other adjustments and non-cash settlements			(1.5)
Balance, ending	1.8		1.8
Corporate
Restructuring Reserve [Roll Forward]
Charges	$ 0.0	$ 0.4	$ 0.0	$ 0.8