STOCK-BASED COMPENSATION PLANS, Summary of Stock Options Outstanding (Details) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2018 USD ($) $ / shares shares
Options [Abstract]
Options outstanding, shares (in shares) | shares	1,644,361
Options outstanding, weighted-average exercise price (in dollars per share)	$ 38.36
Options outstanding, weighted-average remaining life	5 years 10 months 24 days
Options exercisable, shares (in shares) | shares	1,010,795
Options exercisable, weighted-average exercise price (in dollars per share)	$ 32.66
Weighted-average remaining contractual term of outstanding stock options	5 years 10 months 24 days
Weighted-average remaining contractual term of outstanding and exercisable stock options	4 years 8 months 16 days
Aggregate intrinsic value of outstanding stock options | $	$ 32.8
Aggregate intrinsic value of exercisable stock options | $	$ 25.9
$0.00 - $18.00 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]
Exercise price range, lower range limit (in dollars per share)	$ 0
Exercise price range, upper range limit (in dollars per share)	$ 18.00
Options [Abstract]
Options outstanding, shares (in shares) | shares	10,978
Options outstanding, weighted-average exercise price (in dollars per share)	$ 17.82
Options outstanding, weighted-average remaining life	3 months 22 days
Options exercisable, shares (in shares) | shares	10,978
Options exercisable, weighted-average exercise price (in dollars per share)	$ 17.82
$18.001 - $28.00 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]
Exercise price range, lower range limit (in dollars per share)	18.001
Exercise price range, upper range limit (in dollars per share)	$ 28.00
Options [Abstract]
Options outstanding, shares (in shares) | shares	215,014
Options outstanding, weighted-average exercise price (in dollars per share)	$ 23.26
Options outstanding, weighted-average remaining life	2 years 8 months 1 day
Options exercisable, shares (in shares) | shares	215,014
Options exercisable, weighted-average exercise price (in dollars per share)	$ 23.26
$28.001 - $29.00 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]
Exercise price range, lower range limit (in dollars per share)	28.001
Exercise price range, upper range limit (in dollars per share)	$ 29.00
Options [Abstract]
Options outstanding, shares (in shares) | shares	142,691
Options outstanding, weighted-average exercise price (in dollars per share)	$ 28.78
Options outstanding, weighted-average remaining life	3 years 2 months 19 days
Options exercisable, shares (in shares) | shares	142,691
Options exercisable, weighted-average exercise price (in dollars per share)	$ 28.78
$29.001 - $30.00 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]
Exercise price range, lower range limit (in dollars per share)	29.001
Exercise price range, upper range limit (in dollars per share)	$ 30.00
Options [Abstract]
Options outstanding, shares (in shares) | shares	185,866
Options outstanding, weighted-average exercise price (in dollars per share)	$ 29.79
Options outstanding, weighted-average remaining life	4 years 2 months 16 days
Options exercisable, shares (in shares) | shares	185,866
Options exercisable, weighted-average exercise price (in dollars per share)	$ 29.79
$30.001 - $40.00 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]
Exercise price range, lower range limit (in dollars per share)	30.001
Exercise price range, upper range limit (in dollars per share)	$ 40.00
Options [Abstract]
Options outstanding, shares (in shares) | shares	686,103
Options outstanding, weighted-average exercise price (in dollars per share)	$ 37.09
Options outstanding, weighted-average remaining life	6 years 4 months 2 days
Options exercisable, shares (in shares) | shares	391,658
Options exercisable, weighted-average exercise price (in dollars per share)	$ 37.06
$40.001 - $60.00 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]
Exercise price range, lower range limit (in dollars per share)	40.001
Exercise price range, upper range limit (in dollars per share)	$ 60.00
Options [Abstract]
Options outstanding, shares (in shares) | shares	403,709
Options outstanding, weighted-average exercise price (in dollars per share)	$ 56.45
Options outstanding, weighted-average remaining life	8 years 8 months 23 days
Options exercisable, shares (in shares) | shares	64,588
Options exercisable, weighted-average exercise price (in dollars per share)	$ 56.72