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LONG-TERM INCENTIVE EMPLOYEE COMPENSATION - Weighted Average Assumptions (Detail) (USD $)	6 Months Ended
	Jun. 30, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Dividend yield	1.50%
Expected volatility	29.90%
Expected life (in years)	6 years 5 months 6 days
Risk-free rates	1.10%
Grant date fair value	$ 6.62

The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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