STOCK-BASED COMPENSATION (Accounting for Stock-Based Compensation) (Details)	12 Months Ended
Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividend yield	2.50%	2.50%	3.80%
Expected volatility	34.61%	47.35%	43.78%
Risk-free interest rate	1.71%	1.28%	1.61%
Dividend yield blend of current declared dividend as a percentage of the stock price	20.00%	30.00%
Dividend yield blend of current declared dividend as a percentage of a ten year dividend yield	80.00%	70.00%
Employees' Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life	6	5	9
Stock Option Plans [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life	7.4	6.5	6.25

The period of time an equity-based award is expected to be outstanding. An equity-based award's expected term is generally determined based on, among other factors, the instrument's contractual term and the effects of employees' expected exercise and post-vesting employment termination behavior.

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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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