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STOCK-BASED COMPENSATION - Restricted Shares and Stock Units Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested stock units (in shares)	86,591
Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested, equity instruments other than options	6,485,253	5,901,600
Restricted stock units | Performance-based
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested, equity instruments other than options	364,107
Nonvested shares where performance threshold has been met (in shares)	67,331
Restricted shares and restricted stock units | Compensation and related costs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 265.6	$ 285.4	$ 274.6

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Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Performance Threshold Met, Number

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The number of vested but unsettled awards (other than option plans) for which the company is obligated to issue equity instruments or transfer assets to a non-employee director. For these awards the non-employee director has satisfied the service or performance criteria necessary to gain title to the underlying shares but will not receive the shares until separation from the board.

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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