STOCK-BASED COMPENSATION PLANS, Activity in Long-Term Incentive Program (Details) - Stock Options [Member] - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Options, Outstanding [Roll Forward]
Outstanding, beginning of period (in shares)	2,151,776	2,274,891
Granted (in shares)	293,242	281,603
Exercised (in shares)	(469,730)	(380,265)
Forfeited (in shares)	(5,987)	(24,453)
Outstanding, end of period (in shares)	1,969,301	2,151,776
Exercisable, end of period (in shares)	1,200,830
Weighted-average exercise price of shares [Abstract]
Outstanding, beginning of period (in dollars per share)	$ 25.92	$ 24.03
Granted (in dollars per share)	35.36	37.77
Exercised (in dollars per share)	22.42	23.19
Forfeited (in dollars per share)	30.21	28.71
Outstanding, end of period (in dollars per share)	28.15	$ 25.92
Exercisable, end of period (in dollars per share)	$ 24.79