EMPLOYEE STOCK BENEFIT PLANS - Schedule of Assumptions Used in the Valuations of Stock Options (Details)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Expected volatility	24.70%	26.30%	27.00%
Risk-free interest rate	1.50%	1.70%	0.90%
Dividend yield	1.60%	1.80%	1.90%
Expected life	4 years 11 months	5 years 6 months	5 years 3 months 20 days