PENSION AND OTHER POST-RETIREMENT BENEFIT PLANS - Savings plans (Details) - Non-Qualified Plan - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred compensation, non-current	$ 23.0	$ 18.5
Deferred compensation plan assets	23.0	18.5
Employer matching contributions	21.1	19.8
Employer contributions	$ 4.4	$ 8.7

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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+ Details