EMPLOYEE SAVINGS PLANS (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Deferred Compensation Arrangement with Individual, Postretirement Benefits
Deferred compensation liability	$ 100.4	$ 90.2
Deferred compensation liability, current	3.9	6.1
UNITED STATES
Deferred Compensation Arrangement with Individual, Postretirement Benefits
Matching contributions paid	10.9	8.4	$ 3.6
UNITED KINGDOM
Deferred Compensation Arrangement with Individual, Postretirement Benefits
Matching contributions paid	$ 4.5	$ 3.8	$ 2.9

Amount of contributions made by employer into fund established for purposes of making future disbursement to individual in accordance with deferred compensation arrangement.

No definition available.

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- Definition

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.

+ References

No definition available.

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- Definition

Aggregate carrying value as of the balance sheet date of the liabilities for all deferred compensation arrangements payable within one year (or the operating cycle, if longer). Represents currently earned compensation under compensation arrangements that is not actually paid until a later date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 710
-SubTopic 10
-Section 25
-Paragraph 9
-URI https://asc.fasb.org/extlink&oid=6409733&loc=d3e19512-108361

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 710
-SubTopic 10
-Section 30
-Paragraph 2
-URI https://asc.fasb.org/extlink&oid=6409875&loc=d3e20028-108363

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- Definition

Aggregate carrying value as of the balance sheet date of the liabilities for all deferred compensation arrangements. Represents currently earned compensation under compensation arrangements that is not actually paid until a later date.

+ References

No definition available.

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