SHARE-BASED COMPENSATION AND BENEFIT PLANS (Stock Option) (Narrative) (Details) - Stock option [Member] - USD ($) $ / shares in Units, $ in Millions	6 Months Ended
Jun. 30, 2021	Jun. 30, 2020
Share-Based Compensation and Benefit Plans
Weighted-average grant date fair value of options awarded	$ 144.30	$ 105.54
Remaining unrecognized compensation expense	$ 37.4
Weighted-average period for cost recognition	2 years 7 months 6 days
Employee stock option [Member]
Share-Based Compensation and Benefit Plans
Options expiration period	10 years
Vesting period	4 years
Option vesting rate per year	25.00%

Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Weighted-average period over which cost not yet recognized is expected to be recognized for 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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Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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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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-Publisher FASB
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Percentage of vesting of award under share-based payment arrangement.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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