STOCK-BASED COMPENSATION (Details 3) (USD $) In Millions, except Share data, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Performance Stock Rights | Maximum
Assumptions used in the valuation of the outstanding grants
Period of historical volatility used to estimate expected volatility	3 years
Risk-free interest rate maximum (as a percent)	1.27%
Expected dividend yield (as a percent)	5.34%
Expected volatility maximum (as a percent)	36.00%
Performance Stock Rights | Minimum
Assumptions used in the valuation of the outstanding grants
Period of historical volatility used to estimate expected volatility	2 years
Risk-free interest rate minimum (as a percent)	0.26%
Expected dividend yield (as a percent)	5.18%
Expected volatility minimum (as a percent)	19.00%
Performance Stock Rights Accounted for as Equity Awards
Performance Stock Rights and Restricted Share Units Activity
Outstanding at the beginning of the period (in shares)	4,908
Granted (in shares)	1,374
Award modifications (in shares)	2,601
Distributed (in shares)	(4,318)
Adjustment for final payout (in shares)	996
Outstanding at the end of the period (in shares)	5,561
Weighted-Average Fair Value
Outstanding at the beginning of the period (in dollars per share)	$ 66.95
Granted (in dollars per share)	$ 48.50	$ 52.70
Award modifications (in dollars per share)	$ 39.80
Distributed (in dollars per share)	$ 74.53
Adjustment for final payout (in dollars per share)	$ 74.53
Outstanding at the end of the period (in dollars per share)	$ 45.16
Additional Disclosures
Period prior to the end of the performance period during which employees cannot change their election to defer the value of award into deferred compensation plan	6 months
Performance Stock Rights Accounted for as Liability Awards
Performance Stock Rights and Restricted Share Units Activity
Outstanding at the beginning of the period (in shares)	6,774
Granted (in shares)	5,489
Award modifications (in shares)	(2,601)
Distributed (in shares)	(573)
Adjustment for final payout (in shares)	133
Outstanding at the end of the period (in shares)	9,222
Weighted-Average Fair Value
Outstanding at the end of the period, fair value as of the reporting date (in dollars per shares)	$ 48.91
Additional Disclosures
Period prior to the end of the performance period during which employees cannot change their election to defer the value of award into deferred compensation plan	6 months
Restricted share units
Performance Stock Rights and Restricted Share Units Activity
Outstanding at the beginning of the period (in shares)	67,954
Granted (in shares)	23,055
Dividend equivalents (in shares)	2,304
Vested and released (in shares)	(28,079)
Outstanding at the end of the period (in shares)	65,234
Weighted-Average Fair Value
Outstanding at the beginning of the period (in dollars per share)	$ 48.26
Granted (in dollars per share)	$ 56.05	$ 53.24
Dividend equivalents (in dollars per shares)	$ 52.02
Vested and released (in dollars per shares)	$ 46.20
Outstanding at the end of the period (in dollars per share)	$ 52.04
Intrinsic Value
Total intrinsic value of awards vested and released	$ 1.6	$ 1.5
Additional Disclosures
Compensation cost not yet recognized	$ 1.4
Weighted-average period over which compensation cost is to be recognized	2 years 4 months