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Goodwill and Other Intangible Assets, net - Net Carrying Value of Other Intangibles (Details) - USD ($) $ in Millions | Sep. 30, 2021 | Dec. 31, 2020
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Net book value of other intangible assets by the reportable segment |  |
Other intangible assets, net | $ 1,599.4 | $ 960.9
Corporate |  |
Net book value of other intangible assets by the reportable segment |  |
Other intangible assets, net | 11.7 | 13.9
Carlisle Construction Materials |  |
Net book value of other intangible assets by the reportable segment |  |
Other intangible assets, net | 994.2 | 300.9
Carlisle Interconnect Technologies |  |
Net book value of other intangible assets by the reportable segment |  |
Other intangible assets, net | 346.2 | 384.8
Carlisle Fluid Technologies |  |
Net book value of other intangible assets by the reportable segment |  |
Other intangible assets, net | $ 247.3 | $ 261.3

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- Definition Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph ((a)(1),(b)) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16212-109274 + Details
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