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Stock-Based Compensation (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Stock-based compensation
Aggregate grant-date fair value of stock options, restricted stock awards, performance share awards and restricted stock units	$ 18.2csl_ShareBasedCompensationArrangementByShareBasedPaymentAwardTotalGrantDateFairValue
Stock-based compensation expense
Pre-tax compensation expense	7.4us-gaap_AllocatedShareBasedCompensationExpense	7.7us-gaap_AllocatedShareBasedCompensationExpense
Executive Incentive Program(Member)
Stock-based compensation
Shares available for grant under the plan	2,240,935us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant / us-gaap_PlanNameAxis = csl_ExecutiveIncentiveProgramMember
Shares available for issuance under the plan	302,285csl_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForIssuance / us-gaap_PlanNameAxis = csl_ExecutiveIncentiveProgramMember
Nonemployee Director Equity Plan(Member)
Stock-based compensation
Shares available for issuance under the plan	245,361csl_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForIssuance / us-gaap_PlanNameAxis = csl_NonemployeeDirectorEquityPlanMember
Stock options
Stock-based compensation
Stock options granted (in shares)	266,020us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember
Portion of stock options vesting on the first anniversary	0.3333csl_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingRightsOnFirstAnniversary / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember
Portion of stock options vesting on the second anniversary	0.3333csl_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingRightsOnSecondAnniversary / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember
Portion of stock options vesting on the third anniversary	0.3333csl_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingRightsOnThirdAnniversary / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember
Maximum term life	10 years
Stock-based compensation expense
Pre-tax compensation expense	$ 1.3us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember	$ 1.1us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember
Weighted-average assumptions used to estimate grant date fair value of stock options
Expected dividend yield (as a percent)	1.10%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember	1.20%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember
Expected life in years	5 years 8 months 16 days	5 years 8 months 27 days
Expected volatility (as a percent)	27.30%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember	29.30%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember
Risk-free interest rate (as a percent)	1.40%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember	1.70%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember
Weighted average fair value (in dollars per share)	$ 21.19us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember	$ 19.15us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember
Restricted stock awards
Stock-based compensation
Awards granted (in shares)	57,180us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = csl_RestrictedStockAwardMember
Restricted stock awards | Nonemployee Director Equity Plan(Member)
Stock-based compensation
Shares available for issuance under the plan	15,361csl_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForIssuance / us-gaap_AwardTypeAxis = csl_RestrictedStockAwardMember / us-gaap_PlanNameAxis = csl_NonemployeeDirectorEquityPlanMember
Performance share awards
Stock-based compensation
Awards granted (in shares)	57,180us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = csl_PerformanceShareAwardMember
Restricted Stock Units
Stock-based compensation
Awards granted (in shares)	10,925us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember

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- Definition

Description of award terms as to how many shares or portion of an award are no longer contingent on satisfaction of either a service condition, market condition or a performance condition, thereby giving the employee the legal right to convert the award to shares, to sell the shares and be entitled to the cash proceeds of such sale, on the first anniversary of grant.

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Description of award terms as to how many shares or portion of an award are no longer contingent on satisfaction of either a service condition, market condition or a performance condition, thereby giving the employee the legal right to convert the award to shares, to sell the shares and be entitled to the cash proceeds of such sale, on the second anniversary of grant.

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Description of award terms as to how many shares or portion of an award are no longer contingent on satisfaction of either a service condition, market condition or a performance condition, thereby giving the employee the legal right to convert the award to shares, to sell the shares and be entitled to the cash proceeds of such sale, on the third anniversary of grant.

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Represents the number of shares available for issuance under the equity-based compensation plan.

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Represents the aggregate grant-date fair value of share-based compensation plan awards to be expensed over the requisite period.

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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The risk-free interest rate assumption that is used in valuing an option on its own shares.

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Net number of share options (or share units) granted during the period.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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