Deferred Revenue (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Deferred revenue
Extended product warranty contracts - current	$ 27.8	$ 23.2
Roofing Systems Product
Extended product warranty
Extended product warranty contracts amortization	20.4	19.5	$ 18.5
Carlisle Fluid Technologies
Deferred revenue
Extended product warranty contracts - current	19.8	18.8
Customer prepayments - current	8.0	4.4
Extended product warranty contracts - long-term	188.0	172.0
Deferred revenue	$ 215.8	$ 195.2

The current portion of prepayments received from customers for goods or services to be provided in the future.

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Amount of deferred revenue as of balance sheet date. Deferred revenue represents collections of cash or other assets related to a revenue producing activity for which revenue has not yet been recognized. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP.

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The carrying amount of consideration received or receivable as of the balance sheet date on potential earnings that were not recognized as revenue in conformity with GAAP, and which are expected to be recognized as such within one year or the normal operating cycle, if longer, including sales, license fees, and royalties, but excluding interest income.

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Amount at end of the reporting period of the aggregate extended product warranty liability that is expected to be paid within one year of the balance sheet date or normal operating cycle, if longer. Does not include the balance for the standard product warranty liability.

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