Discontinued Operations - Results from Discontinued Operations (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income (loss) from discontinued operations before income taxes	$ 2.2	$ 0.5	$ 13.0	$ (4.7)
(Benefit from) provision for income taxes	(26.9)	0.9	(24.4)	(0.7)
Income (loss) from discontinued operations	29.1	(0.4)	37.4	(4.0)
Carlisle Brake & Friction
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenues	32.8	69.7	219.7	199.5
Cost of goods sold	23.9	57.2	171.3	167.0
Other operating expenses, net	4.5	11.5	28.3	37.1
Operating income (loss)	4.4	1.0	20.1	(4.6)
Other non-operating expense, net	0.0	0.5	0.2	0.1
Income (loss) from discontinued operations before income taxes and loss on sale	4.4	0.5	19.9	(4.7)
Loss on sale of discontinued operations	(2.2)	0.0	(6.9)	0.0
(Benefit from) provision for income taxes	(26.9)	0.9	(24.4)	(0.7)
Income (loss) from discontinued operations	$ 29.1	$ (0.4)	$ 37.4	$ (4.0)