Exit and Disposal Activities - Exit and Disposal Activity Liability (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Restructuring Reserve [Roll Forward]
Balance, beginning			$ 13.1
Charges	$ 4.6	$ 5.0	7.7	$ 8.2
Cash payments			(12.0)
Other adjustments and non-cash settlements			(1.7)
Balance, ending	7.1		7.1
Carlisle Interconnect Technologies
Restructuring Reserve [Roll Forward]
Balance, beginning			4.9
Charges	0.8	2.5	1.9	4.8
Cash payments			(5.6)
Other adjustments and non-cash settlements			(0.6)
Balance, ending	0.6		0.6
Carlisle Fluid Technologies
Restructuring Reserve [Roll Forward]
Balance, beginning			6.7
Charges	0.5	0.5	0.5	1.0
Cash payments			(5.3)
Other adjustments and non-cash settlements			0.0
Balance, ending	1.9		1.9
Carlisle Brake & Friction
Restructuring Reserve [Roll Forward]
Balance, beginning			1.5
Charges	3.3	1.7	5.3	2.0
Cash payments			(1.1)
Other adjustments and non-cash settlements			(1.1)
Balance, ending	4.6		4.6
Corporate
Restructuring Reserve [Roll Forward]
Charges	$ 0.0	$ 0.3	$ 0.0	$ 0.4