RESTRUCTURING CHARGES (Details 2) - USD ($) $ in Millions	3 Months Ended		60 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Restructuring Cost and Reserve [Line Items]
Accrued restructuring costs	$ 7.6	$ 3.0	$ 7.6	$ 3.5	$ 3.1
Restructuring charges	6.9	1.7	250.3
Amounts utilized	(2.8)	(1.8)
Employee severance and related benefit costs
Restructuring Cost and Reserve [Line Items]
Accrued restructuring costs	1.4	0.0	1.4	1.8	0.0
Restructuring charges	0.0	0.1	8.8
Amounts utilized	(0.4)	(0.1)
Lease and other contract termination costs
Restructuring Cost and Reserve [Line Items]
Accrued restructuring costs	6.2	3.0	6.2	1.7	3.1
Restructuring charges	4.6	0.1	46.8
Amounts utilized	(0.1)	(0.2)
Facility exit costs
Restructuring Cost and Reserve [Line Items]
Accrued restructuring costs	0.0	0.0	0.0	$ 0.0	$ 0.0
Restructuring charges	2.3	1.5	$ 56.0
Amounts utilized	$ (2.3)	$ (1.5)