STOCK-BASED COMPENSATION PLANS - Summary of Stock Options Outstanding (Details) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2020 USD ($) $ / shares shares
Options [Abstract]
Options outstanding, shares (in shares) | shares	1,542,259
Options outstanding, weighted-average exercise price (in dollars per share)	$ 45.49
Options outstanding, weighted-average remaining life	5 years 11 months 8 days
Options exercisable, shares (in shares) | shares	978,833
Options exercisable, weighted-average exercise price (in dollars per share)	$ 40.77
Weighted-average remaining contractual term of outstanding stock options	5 years 11 months 8 days
Weighted-average remaining contractual term of outstanding and exercisable stock options	4 years 8 months 26 days
Aggregate intrinsic value of outstanding stock options | $	$ 25.9
Aggregate intrinsic value of exercisable stock options | $	$ 21.1
$0.00 - $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)	$ 0.00
Exercise price range, upper range limit (in dollars per share)	$ 28.00
Options [Abstract]
Options outstanding, shares (in shares) | shares	50,619
Options outstanding, weighted-average exercise price (in dollars per share)	$ 23.95
Options outstanding, weighted-average remaining life	4 years 9 months
Options exercisable, shares (in shares) | shares	50,619
Options exercisable, weighted-average exercise price (in dollars per share)	$ 23.95
$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	52,014
Options outstanding, weighted-average exercise price (in dollars per share)	$ 28.78
Options outstanding, weighted-average remaining life	1 year 2 months 19 days
Options exercisable, shares (in shares) | shares	52,014
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	104,045
Options outstanding, weighted-average exercise price (in dollars per share)	$ 29.79
Options outstanding, weighted-average remaining life	2 years 2 months 15 days
Options exercisable, shares (in shares) | shares	104,045
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	536,831
Options outstanding, weighted-average exercise price (in dollars per share)	$ 37.12
Options outstanding, weighted-average remaining life	4 years 4 months 13 days
Options exercisable, shares (in shares) | shares	493,761
Options exercisable, weighted-average exercise price (in dollars per share)	$ 37.04
$40.001 - $60.00
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	798,750
Options outstanding, weighted-average exercise price (in dollars per share)	$ 55.61
Options outstanding, weighted-average remaining life	7 years 10 months 9 days
Options exercisable, shares (in shares) | shares	278,394
Options exercisable, weighted-average exercise price (in dollars per share)	$ 56.78