SHARE-BASED COMPENSATION PLANS (Narrative) (Detail) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
CommonStockSharesAuthorized	100,000,000	100,000,000
Granted	0
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	$ 0	$ 10.57	$ 8.52
Long Term Incentive Plan [Member]
ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
CommonStockCapitalSharesReservedForFutureIssuance	5,000,000
Share Based Compensation Arrangement By Share Based Payment Award Maximum Number Of Shares Awarded Per Employee	200,000
Non Qualfied Stock Options [Member]
ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	$ 3.1	$ 3.9	$ 1.8
EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	0.3
ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions	6.7	4.2	1.8
Deferred Tax Expense from Stock Options Exercised	1.0	1.1	0.6
Performance Shares [Member]
ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
StockGrantedDuringPeriodValueSharebasedCompensationGross	16.2	19.3	14.1
AllocatedShareBasedCompensationExpense	12.6	8.1	6.5
EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	8.0
EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition	1 year 6 months
Restricted Stock Units RSU [Member]
ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
Share Based Compensation Arrangement By Share Based Payment Award Maximum Number Of Shares Awarded Per Employee	100,000
EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	7.7
Share Based Compensation Arrangement By Share Based Payment Award Award Requisite Service Period Range Min	3 years 0 months
Share Based Compensation Arrangement By Share Based Payment Award Award Requisite Service Period Range Max	10 years 1 month
Employee Stock [Member]
ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
Deferred Tax Expense from Stock Options Exercised	0.2
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized	1,200,000
Common Stock Original Amount Shares Authorized	2,000,000
CommonStockSharesAuthorized	3,200,000
StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans	293,124
SharesHeldInEmployeeStockOptionPlanCommittedToBeReleased	150,609
Director [Member]
ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
Share Based Compensation Arrangement By Share Based Payment Award Maximum Number Of Shares Awarded Per Employee	100,000
StockGrantedDuringPeriodValueSharebasedCompensationGross	70,000.0	70,000.0	70,000.0
DeferredCompensationArrangementWithIndividualSharesIssued	68,974	74,017
ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod	12,955	12,687
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	$ 31.16	$ 30.26
New Director [Member]
ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
StockGrantedDuringPeriodValueSharebasedCompensationGross		$ 35,000.0
Director Restricted Stock [Member]
ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
Granted	16,977	16,680	18,456
DeferredCompensationArrangementWithIndividualSharesIssued	8,935	7,820	9,228

The original number of common shares permitted to be issued by an entity's charter and bylaws.

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- Definition

Amount of deferred tax expense from write-off of the deferred tax asset related to deductible stock options at exercise.

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- Definition

Description of the estimated maximum range of time over which an employee is required to provide service in exchange for the equity-based payment award, which often is the vesting period. This period may be explicit or implicit based on the terms of the award, and may be presented in a variety of ways (for example, year, month and year, day, month and year, quarter of a year).

+ References

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Description of the estimated minimum range of time over which an employee is required to provide service in exchange for the equity-based payment award, which often is the vesting period. This period may be explicit or implicit based on the terms of the award, and may be presented in a variety of ways (for example, year, month and year, day, month and year, quarter of a year).

+ References

No definition available.

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- Definition

The highest quantity of shares an employee can purchase under the plan per period.

+ References

No definition available.

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- Definition

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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-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

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- Definition

Aggregate number of common shares reserved for future issuance.

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-Name Statement of Financial Accounting Standard (FAS)

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- Definition

The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 30

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- Definition

The number of shares issued pursuant to the terms of the deferred compensation plan as of the balance sheet date.

+ References

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- Definition

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.

+ References

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- Definition

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

The total cash inflow associated with the amount received from holders to acquire the entity's shares under incentive and share awards, including stock option exercises. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately.

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-Topic 230

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-Paragraph 14

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-Glossary Financing Activities

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- Definition

Number of additional shares authorized for issuance under an established share-based compensation plan.

+ References

No definition available.

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- Definition

The total accumulated difference between fair values of underlying shares on dates of exercise and exercise price on options which were exercised (or share units converted) into shares during the reporting period under the plan.

+ References

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- Definition

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

+ References

No definition available.

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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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-Name Accounting Standards Codification

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- Definition

Number of share instruments newly issued under a share-based compensation plan.

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-Name Accounting Standards Codification

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Number of committed-to-be-released shares held by the Employee Stock Option Plan at balance sheet date. Committed-to-be-released shares are shares that will be released in the future and will be allocated to employees for services rendered in an accounting period. These shares are legally released from suspense and from serving as collateral for ESOP debt as a result of payment of debt service.

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-Publisher FASB

-Name Accounting Standards Codification

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-Paragraph 1

-Subparagraph (d)

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-Publisher AICPA

-Name Statement of Position (SOP)

-Number 93-6

-Paragraph 53

-Subparagraph d

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Gross value of stock (or other type of equity) granted during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP). This element is not the recognition of equity-based compensation expense in pursuant to FAS 123R. That element is AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue (Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition, Value).

+ References

No definition available.

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Number of shares issued during the period as a result of an employee stock purchase plan.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

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-Paragraph 1

-Subparagraph (SX 210.3-04)

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-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 12

-Paragraph 10

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 29, 30

-Article 5

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-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

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