STOCK-BASED COMPENSATION PLANS - Inputs to Model the Value of Options Granted (Details) - Stock Appreciation Rights (SARs) And Employee Stock Option	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Assumptions used in valuation
Risk-free interest rate (as a percent)	2.10%
Expected years to exercise	5 years	5 years	5 years
Expected volatility (as a percent)	37.00%
Annual dividend yield (as a percent)	2.00%	2.10%
Minimum
Assumptions used in valuation
Risk-free interest rate (as a percent)		1.20%	1.30%
Expected volatility (as a percent)		37.50%	42.10%
Annual dividend yield (as a percent)			2.00%
Maximum
Assumptions used in valuation
Risk-free interest rate (as a percent)		1.90%	1.90%
Expected volatility (as a percent)		42.10%	47.00%
Annual dividend yield (as a percent)			2.70%