STOCK-BASED COMPENSATION PLANS (DETAILS) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation Cost	$ 2.7	$ 3.7	$ 7.3	$ 8.7
Stock options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options, Grants in Period, Gross			70,080	129,970
Options, Grants in Period, Weighted Average Grant Date Fair Value			$ 32.99	$ 18.05
Compensation Cost	0.5	1.0	2.0	2.8
Nonvested Awards, Total Compensation Cost Not yet Recognized	2.8		2.8
Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition			2
Options, Outstanding, Number	750,718		750,718
Options, Outstanding, Weighted Average Exercise Price	$ 33.40		$ 33.40
Options, Exercisable, Number	273,752		273,752
Options, Exercisable, Weighted Average Exercise Price	$ 33.80		$ 33.80
Restricted stock units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation Cost	1.1	1.3	3.8	3.8
Nonvested Awards, Total Compensation Cost Not yet Recognized	5.8		5.8
Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition			1.9
Equity Instruments Other than Options, Grants in Period			74,096
Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value			$ 61.31
Performance share units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation Cost	0.6	1.1	1.0	1.7
Equity Instruments Other than Options, Vested in Period, Total Fair Value	2.3
Deferred stock awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation Cost	0.3	0.3	0.3	0.3
Equity Instruments Other than Options, Grants in Period	4,208	6,328
Employee stock purchase plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation Cost	$ 0.2	$ 0	$ 0.2	$ 0.1

As of the balance sheet date, the aggregate unrecognized cost of equity-based awards made to employees under equity-based compensation awards that have yet to vest.

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The weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, using a decimal to express in number of years.

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- Definition

Equity-based compensation cost during the period with respect to the award, which will be recognized in income (as well as the total recognized tax benefit) or capitalized as part of the cost of an asset.

+ References

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- Definition

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).

+ References

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- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued 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).

+ References

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The total fair value of equity-based awards for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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- Definition

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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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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

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- Definition

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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- Definition

The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options.

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The weighted average price as of the beginning of the year at which grantees can acquire the shares reserved for issuance under the stock option plan.

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