STOCK-BASED COMPENSATION – STOCK OPTIONS (Details) (Stock options, USD $) In Millions, except Share data, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Stock options
Weighted-average fair values along with the assumptions incorporated into the valuation model
Period of historical volatility used to estimate expected volatility	10 years
Expected term	8 years
Risk-free interest rate, minimum (as a percent)	0.12%
Risk-free interest rate, maximum (as a percent)	2.88%
Expected dividend yield (as a percent)	5.28%
Expected volatility (as a percent)	18.00%
Weighted-average fair value per stock option (in dollars per share)	$ 6.70	$ 6.03
Stock Options
Outstanding, at the beginning of the period (in shares)	1,550,374
Granted (in shares)	264,332
Exercised (in shares)	(411,214)
Forfeited (in shares)	(2,542)
Outstanding, at the end of the period (in shares)	1,400,950
Exercisable at the end of the period (in shares)	714,317
Weighted-Average Exercise Price Per Share
Outstanding at the beginning of the period (in dollars per share)	$ 50.93
Granted (in dollars per share)	$ 55.23
Exercised (in dollars per share)	$ 48.63
Forfeited (in dollars per share)	$ 55.23
Outstanding at the end of the period (in dollars per share)	$ 52.41
Exercisable at the end of the period (in dollars per share)	$ 50.33
Weighted-Average Remaining Contractual Life (in Years)
Outstanding at the end of the period	6 years 7 months
Exercisable at the end of period	4 years 11 months
Aggregate Intrinsic Value
Outstanding at the end of the period (in dollars)	$ 17.4
Exercisable at the end of the period (in dollars)	10.3
Options exercised (in dollars)	7.5	9.0
Additional disclosures
Tax benefit realized for the tax deductions from option exercises	3.0	3.6
Compensation cost not yet recognized	$ 1.5