Discontinued Operations - Balance Sheet (Details) - Carlisle Brake & Friction - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash and cash equivalents	$ 12.0	$ 5.1
Receivables, net	79.7	58.3
Inventories	72.3	70.8
Prepaid other current assets	10.4	10.4
Current assets	174.4	144.6
Long-term assets reclassified to current assets	275.5	0.0
Current assets	449.9	144.6
Property, plant, and equipment, net	101.2	102.0
Goodwill, net	96.5	96.5
Other intangible assets, net	71.3	73.9
Other long-term assets	6.5	2.6
Long-term assets	275.5	275.0
Long-term assets reclassified to current assets	(275.5)	0.0
Long-term assets	0.0	275.0
Accounts payable	44.8	33.1
Accrued liabilities and other	22.7	20.4
Current liabilities	67.5	53.5
Long-term liabilities reclassified to current liabilities	25.3	0.0
Current liabilities	92.8	53.5
Other long-term liabilities	25.3	21.9
Long-term liabilities	25.3	21.9
Long-term liabilities reclassified to current liabilities	(25.3)	0.0
Total long-term liabilities	$ 0.0	$ 21.9