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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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The net result for the period of deducting operating expenses from operating revenues.

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Segment Information- Financial Information for Operations (Details) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019 USD ($)	Sep. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2019 USD ($) item segment	Dec. 31, 2018 USD ($) item	Dec. 31, 2017 USD ($) item
Net Sales, EBIT, Assets continuing operations by reportable segment
Sales	$ 1,144.3	$ 1,280.6	$ 1,314.8	$ 1,071.9	$ 1,077.3	$ 1,181.4	$ 1,236.1	$ 984.7	$ 4,811.6	$ 4,479.5	$ 3,750.8
Operating Income (Loss)	141.3	$ 191.0	$ 207.2	$ 114.7	114.6	$ 140.0	$ 159.7	$ 94.7	654.2	509.0	464.0
Assets	5,496.0				5,249.2				5,496.0	5,249.2	5,299.8
Assets, Discontinued operations					0.0					0.0	469.3
Depreciation and amortization									205.4	190.6	169.1
Depreciation and amortization, Discontinued operations										5.1	22.8
Capital expenditures, Discontinued operations										8.1	8.9
Capital expenditures									$ 88.9	$ 120.7	$ 159.9
Number of reportable segments \| segment									4
Customer \| Net sales \| Beacon Roofing Supply, Inc
Net Sales, EBIT, Assets continuing operations by reportable segment
Concentration risk (as a percent)									11.00%	11.80%
Customer \| Net sales \| ABC Supply Co.
Net Sales, EBIT, Assets continuing operations by reportable segment
Concentration risk (as a percent)									10.50%		10.40%
Customer \| Net sales \| Other Customers
Net Sales, EBIT, Assets continuing operations by reportable segment
Number of customers \| item									0	0	0
Operating Segments
Net Sales, EBIT, Assets continuing operations by reportable segment
Sales									$ 4,811.6	$ 4,479.5	$ 3,750.8
Operating Income (Loss)									752.9	589.0	530.1
Assets	5,127.0				4,441.7				5,127.0	4,441.7	4,484.1
Depreciation and amortization									202.7	182.6	143.7
Capital expenditures									76.3	111.1	149.8
Corporate and unallocated
Net Sales, EBIT, Assets continuing operations by reportable segment
Sales									0.0	0.0	0.0
Operating Income (Loss)									(98.7)	(80.0)	(66.1)
Assets	369.0				807.5				369.0	807.5	346.4
Depreciation and amortization									2.7	2.9	2.6
Capital expenditures									12.6	1.5	1.2
Carlisle Construction Materials
Net Sales, EBIT, Assets continuing operations by reportable segment
Sales									3,233.3	2,880.3	2,336.2
Carlisle Construction Materials \| Operating Segments
Net Sales, EBIT, Assets continuing operations by reportable segment
Sales									3,233.3	2,880.3	2,336.2
Operating Income (Loss)									576.0	435.4	421.9
Assets	2,097.8				1,870.7				2,097.8	1,870.7	1,898.6
Depreciation and amortization									93.9	77.9	41.9
Capital expenditures									30.1	50.0	61.0
Carlisle Interconnect Technologies
Net Sales, EBIT, Assets continuing operations by reportable segment
Sales									972.9	933.8	815.3
Carlisle Interconnect Technologies \| Operating Segments
Net Sales, EBIT, Assets continuing operations by reportable segment
Sales									972.9	933.8	815.3
Operating Income (Loss)									131.6	117.3	89.5
Assets	1,880.4				1,446.4				1,880.4	1,446.4	1,473.0
Depreciation and amortization									63.0	58.3	55.8
Capital expenditures									23.6	27.2	53.2
Carlisle Fluid Technologies
Net Sales, EBIT, Assets continuing operations by reportable segment
Sales									278.4	291.6	281.4
Carlisle Fluid Technologies \| Operating Segments
Net Sales, EBIT, Assets continuing operations by reportable segment
Sales									278.4	291.6	281.4
Operating Income (Loss)									24.0	37.1	16.1
Assets	707.5				678.0				707.5	678.0	678.7
Depreciation and amortization									24.1	22.9	23.0
Capital expenditures									3.5	11.5	8.8
Carlisle Brake & Friction
Net Sales, EBIT, Assets continuing operations by reportable segment
Sales									327.0	373.8	317.9
Carlisle Brake & Friction \| Operating Segments
Net Sales, EBIT, Assets continuing operations by reportable segment
Sales									327.0	373.8	317.9
Operating Income (Loss)									21.3	(0.8)	2.6
Assets	$ 441.3				$ 446.6				441.3	446.6	433.8
Depreciation and amortization									21.7	23.5	23.0
Capital expenditures									$ 19.1	$ 22.4	$ 26.8