Discontinued Operations - Results from Discontinued Operations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
(Benefit from) provision for income taxes	$ (1.3)	$ (0.9)	$ 47.6
(Loss) income from discontinued operations	(4.1)	(0.9)	252.5
Carlisle Food Service Products
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue	0.0	0.0	69.5
Cost of goods sold	0.0	0.0	49.5
Other operating expense, net	0.0	0.0	16.7
Operating income	0.0	0.0	3.3
Other non-operating expense, net	5.4	1.8	0.0
(Loss) income from discontinued operations before income taxes	(5.4)	(1.8)	3.3
Gain on sale of discontinued operations	0.0	0.0	296.8
(Benefit from) provision for income taxes	(1.3)	(0.9)	47.6
(Loss) income from discontinued operations	$ (4.1)	$ (0.9)	$ 252.5