CAPITAL STOCK AND STOCK AWARD PLANS - Summary of Performance Based Shares and Units by First Vesting Date (Details)	12 Months Ended
Dec. 31, 2018 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance shares and stock units granted, net of forfeitures (in shares)	1,696,609
Weighted average grant date fair value (in dollars per share) \| $ / shares	$ 64.91
Unvested performance shares and restricted stock units (in shares)	846,170
First Vesting Date - Dec 31 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance shares and stock units granted, net of forfeitures (in shares)	323,442
Weighted average grant date fair value (in dollars per share) \| $ / shares	$ 61.75
Unvested performance shares and restricted stock units (in shares)	34,572
First Vesting Date - Dec 31 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance shares and stock units granted, net of forfeitures (in shares)	389,644
Weighted average grant date fair value (in dollars per share) \| $ / shares	$ 51.88
Unvested performance shares and restricted stock units (in shares)	139,431
First Vesting Date - Dec 31 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance shares and stock units granted, net of forfeitures (in shares)	339,808
Weighted average grant date fair value (in dollars per share) \| $ / shares	$ 64.91
Unvested performance shares and restricted stock units (in shares)	162,955
First Vesting Date - Dec 31 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance shares and stock units granted, net of forfeitures (in shares)	312,797
Weighted average grant date fair value (in dollars per share) \| $ / shares	$ 74.26
Unvested performance shares and restricted stock units (in shares)	178,294
First Vesting Date - Dec 31 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance shares and stock units granted, net of forfeitures (in shares)	330,918
Weighted average grant date fair value (in dollars per share) \| $ / shares	$ 74.48
Unvested performance shares and restricted stock units (in shares)	330,918

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
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- Definition

The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

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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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- Definition

Number of shares issued during the period related to Restricted Stock Awards, net of any shares forfeited.

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-Name Accounting Standards Codification
-Topic 505
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