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STOCK PLANS (Stock Option Weighted Average Assumptions) (Details) - Stock options - $ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Stock Plans
Expected volatility	25.80%	25.98%	25.36%
Dividend yield	2.51%	2.42%	1.92%
Risk-free interest rate	1.41%	2.49%	2.69%
Expected option life (in years)	4 years 8 months 12 days	4 years 7 months 6 days	4 years 7 months 6 days
Weighted average fair value per option granted during the year	$ 15.97	$ 17.46	$ 18.97

X

- Definition

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

+ References

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- Definition

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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The risk-free interest rate assumption that is used in valuing an option on its own shares.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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