RETIREMENT PLANS AND OTHER BENEFITS - Change in fair value measurements of level 3 investments (Details) - Non-U.S. Plans - Pension Plan - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward]
Fair value of plan assets at beginning of year	$ 122.1	$ 107.5
Foreign exchange effect	5.9	4.9
Fair value of plan assets at end of year	139.9	122.1
Fair Value, Inputs, Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward]
Fair value of plan assets at beginning of year	35.5	0.0
Actuarial gain (loss)	1.1	0.0
Transfers into (out of) Level 3	(2.4)	35.5
Foreign exchange effect	$ 1.1	0.0
Fair value of plan assets at end of year		$ 35.5

Defined Benefit Plan, Plan Assets, Acutuarial Gain (Loss)

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

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- Definition

Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee.

+ References

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- Definition

Amount of foreign currency translation gain (loss) which (increases) decreases benefit obligation of defined benefit plan.

+ References

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- Definition

Amount, measured using unobservable inputs, of increase (decrease) in plan assets of defined benefit plan, for assets transferred into (out of) Level 3 of fair value hierarchy. Includes, but is not limited to, transfer due to change in observability of significant inputs.

+ References

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