EMPLOYEE BENEFIT PLANS - Obligations and Funded Status (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2019	Dec. 31, 2018
Change in plan assets
Fair value of plan assets at beginning of year	$ 271.5
Fair value of plan assets at end of year	304.1	$ 271.5
Fair value of plan assets	271.5	271.5		$ 304.1	$ 271.5
Amounts recognized in the statement of financial position consist of:
Noncurrent liabilities				(113.0)	(95.4)
United States | Defined Benefit Pension Plans
Change in projected benefit obligation
Obligation at beginning of year	(39.4)	(44.2)
Service cost	(0.3)	(0.3)	$ (0.3)
Interest cost	(1.5)	(1.3)	(1.4)
Employee contributions	0.0	0.0
Plan settlements and amendments	0.0	0.0
Benefits paid	3.0	3.5
Acquisition	0.0	0.0
Actuarial gain (loss)	(2.9)	2.9
Effect of currency rate changes	0.0	0.0
Obligation at end of year	(41.1)	(39.4)	(44.2)
Change in plan assets
Fair value of plan assets at beginning of year	31.9	37.4
Actual return on plan assets	5.3	(2.0)
Employer contributions	0.0	0.0
Employee contributions	0.0	0.0
Benefits paid	(2.9)	(3.5)
Settlements	0.0	0.0
Acquisition	0.0	0.0
Effect of currency rate changes	0.0	0.0
Fair value of plan assets at end of year	34.3	31.9	37.4
Fair value of plan assets	34.3	31.9	37.4	34.3	31.9
Benefit obligations	(41.1)	(44.2)	(44.2)	(41.1)	(39.4)
Funded status				(6.8)	(7.5)
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)	(7.5)
Net amount recognized				(6.9)	(7.5)
Amounts recognized in accumulated other comprehensive income (loss) consist of:
Prior service cost				0.0	0.0
Net actuarial loss				(18.8)	(20.3)
Net amount recognized				(18.8)	(20.3)
Foreign Plan | Defined Benefit Pension Plans
Change in projected benefit obligation
Obligation at beginning of year	(309.2)	(353.0)
Service cost	(2.7)	(2.6)	(2.7)
Interest cost	(7.0)	(7.0)	(7.3)
Employee contributions	(0.5)	(0.4)
Plan settlements and amendments	4.4	15.2
Benefits paid	13.1	13.5
Acquisition	(5.0)	(0.9)
Actuarial gain (loss)	(32.4)	6.7
Effect of currency rate changes	(8.0)	19.3
Obligation at end of year	(347.3)	(309.2)	(353.0)
Change in plan assets
Fair value of plan assets at beginning of year	239.4	281.6
Actual return on plan assets	23.9	(6.9)
Employer contributions	9.4	10.8
Employee contributions	0.5	0.4
Benefits paid	(13.1)	(13.5)
Settlements	(0.4)	(16.6)
Acquisition	1.2	0.0
Effect of currency rate changes	8.9	(16.4)
Fair value of plan assets at end of year	269.8	239.4	281.6
Fair value of plan assets	269.8	281.6	281.6	269.8	239.4
Benefit obligations	$ (309.2)	$ (309.2)	$ (353.0)	(347.3)	(309.2)
Funded status				(77.5)	(69.8)
Amounts recognized in the statement of financial position consist of:
Noncurrent assets				11.8	8.9
Current liabilities				(2.4)	(2.1)
Noncurrent liabilities				(86.9)	(76.6)
Net amount recognized				(77.5)	(69.8)
Amounts recognized in accumulated other comprehensive income (loss) consist of:
Prior service cost				(1.4)	(1.4)
Net actuarial loss				(78.3)	(58.7)
Net amount recognized				$ (79.7)	$ (60.1)