Discontinued Operations - Balance Sheet (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total current assets	$ 0.0	$ 144.6
Total long-term assets	0.0	275.0
Total current liabilities	0.0	53.5
Total long-term liabilities	$ 0.0	21.9
Carlisle Brake & Friction
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash and cash equivalents		5.1
Receivables, net		58.3
Inventories		70.8
Prepaid other current assets		10.4
Total current assets		144.6
Property, plant, and equipment, net		102.0
Goodwill, net		96.5
Other intangible assets, net		73.9
Other long-term assets		2.6
Total long-term assets		275.0
Accounts payable		33.1
Accrued liabilities and other		20.4
Total current liabilities		53.5
Other long-term liabilities		21.9
Total long-term liabilities		$ 21.9