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EMPLOYEE BENEFIT PLANS - Obligations and Funded Status (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2020	Dec. 31, 2019
Change in plan assets
Fair value of plan assets at beginning of year	$ 304.1
Fair value of plan assets at end of year	340.7	$ 304.1
Fair value of plan assets	304.1	304.1		$ 340.7	$ 304.1
Amounts recognized in the statement of financial position consist of:
Noncurrent liabilities				(113.5)	(113.0)
United States | Defined Benefit Pension Plans
Change in projected benefit obligation
Obligation at beginning of year	(41.1)	(39.4)
Service cost	(0.3)	(0.3)	$ (0.3)
Interest cost	(1.1)	(1.5)	(1.3)
Employee contributions	0.0	0.0
Plan settlements and amendments	0.0	0.0
Benefits paid	3.3	3.0
Acquisition	0.0	0.0
Actuarial loss	(3.7)	(2.9)
Effect of currency rate changes	0.0	0.0
Obligation at end of year	(42.9)	(41.1)	(39.4)
Change in plan assets
Fair value of plan assets at beginning of year	34.3	31.9
Actual return on plan assets	3.7	5.3
Employer contributions	1.3	0.0
Employee contributions	0.0	0.0
Benefits paid	(3.3)	(2.9)
Settlements	0.0	0.0
Acquisition	0.0	0.0
Other	0.0	0.0
Effect of currency rate changes	0.0	0.0
Fair value of plan assets at end of year	36.0	34.3	31.9
Fair value of plan assets	34.3	34.3	31.9	36.0	34.3
Benefit obligations	(41.1)	(41.1)	(39.4)	(42.9)	(41.1)
Funded status				(6.9)	(6.8)
Amounts recognized in the statement of financial position consist of:
Noncurrent assets				0.0	0.0
Current liabilities				0.0	0.0
Noncurrent liabilities				(6.9)	(6.9)
Net amount recognized				(6.9)	(6.9)
Amounts recognized in accumulated other comprehensive income (loss) before tax consist of:
Prior service cost				0.0	0.0
Net actuarial loss				(19.4)	(18.8)
Net amount recognized				(19.4)	(18.8)
Foreign Plan | Defined Benefit Pension Plans
Change in projected benefit obligation
Obligation at beginning of year	(347.3)	(309.2)
Service cost	(3.4)	(2.7)	(2.6)
Interest cost	(5.4)	(7.0)	(7.0)
Employee contributions	(0.5)	(0.5)
Plan settlements and amendments	(2.0)	4.4
Benefits paid	14.1	13.1
Acquisition	0.0	(5.0)
Actuarial loss	(22.4)	(32.4)
Effect of currency rate changes	(17.9)	(8.0)
Obligation at end of year	(384.8)	(347.3)	(309.2)
Change in plan assets
Fair value of plan assets at beginning of year	269.8	239.4
Actual return on plan assets	25.1	23.9
Employer contributions	10.0	9.4
Employee contributions	0.5	0.5
Benefits paid	(14.0)	(13.1)
Settlements	(2.9)	(0.4)
Acquisition	0.0	1.2
Other	4.8	0.0
Effect of currency rate changes	11.4	8.9
Fair value of plan assets at end of year	304.7	269.8	239.4
Fair value of plan assets	304.7	269.8	239.4	304.7	269.8
Benefit obligations	$ (347.3)	$ (347.3)	$ (309.2)	(384.8)	(347.3)
Funded status				(80.1)	(77.5)
Amounts recognized in the statement of financial position consist of:
Noncurrent assets				13.6	11.8
Current liabilities				(2.5)	(2.4)
Noncurrent liabilities				(91.2)	(86.9)
Net amount recognized				(80.1)	(77.5)
Amounts recognized in accumulated other comprehensive income (loss) before tax consist of:
Prior service cost				(1.5)	(1.4)
Net actuarial loss				(89.6)	(78.3)
Net amount recognized				$ (91.1)	$ (79.7)

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