STOCK-BASED COMPENSATION PLANS, Activity in Long-Term Incentive Program (Details) - Stock Options [Member] - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Options, Outstanding [Roll Forward]
Outstanding, beginning of period (in shares)	1,644,361	1,708,296
Granted (in shares)	199,110	213,504
Exercised (in shares)	(331,315)	(268,004)
Forfeited (in shares)	(9,162)	(9,435)
Outstanding, end of period (in shares)	1,502,994	1,644,361
Exercisable, end of period (in shares)	929,120
Weighted-average exercise price of shares [Abstract]
Outstanding, beginning of period (in dollars per share)	$ 38.36	$ 34.57
Granted (in dollars per share)	59.41	55.92
Exercised (in dollars per share)	30.42	27.94
Forfeited (in dollars per share)	51.29	45.54
Outstanding, end of period (in dollars per share)	42.82	$ 38.36
Exercisable, end of period (in dollars per share)	$ 36.73