RESTRUCTURING AND OTHER COSTS - RESTRUCTURING ACCURALS (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Restructuring Reserve [Roll Forward]
Restructuring and other costs	$ 18.7	$ 5.2	$ 62.5	$ 68.1
2020 Plans
Restructuring Reserve [Roll Forward]
Beginning Balance			30.0
Restructuring and other costs			23.5
Amounts applied			13.5
Change in estimates			(4.2)
Ending Balance	35.8		35.8
Severance
Restructuring Reserve [Roll Forward]
Beginning Balance			27.0
Restructuring and other costs			21.9
Amounts applied			12.4
Change in estimates			(4.1)
Ending Balance	32.4		32.4
Severance | 2018 and Prior Plans
Restructuring Reserve [Roll Forward]
Beginning Balance			7.2
Restructuring and other costs			1.1
Amounts applied			3.2
Change in estimates			(0.5)
Ending Balance	4.6		4.6
Severance | 2019 Plans
Restructuring Reserve [Roll Forward]
Beginning Balance			19.8
Restructuring and other costs			1.5
Amounts applied			7.4
Change in estimates			(3.6)
Ending Balance	10.3		10.3
Severance | 2020 Plans
Restructuring Reserve [Roll Forward]
Beginning Balance			0.0
Restructuring and other costs			19.3
Amounts applied			1.8
Change in estimates			0.0
Ending Balance	17.5		17.5
Lease/Contract Terminations
Restructuring Reserve [Roll Forward]
Beginning Balance			0.5
Restructuring and other costs			0.7
Amounts applied			0.5
Ending Balance	0.7		0.7
Lease/Contract Terminations | 2018 and Prior Plans
Restructuring Reserve [Roll Forward]
Beginning Balance			0.5
Restructuring and other costs			0.4
Amounts applied			0.4
Ending Balance	0.5		0.5
Lease/Contract Terminations | 2020 Plans
Restructuring Reserve [Roll Forward]
Beginning Balance			0.0
Restructuring and other costs			0.3
Amounts applied			0.1
Ending Balance	0.2		0.2
Other Restructuring Costs
Restructuring Reserve [Roll Forward]
Beginning Balance			2.5
Restructuring and other costs			0.9
Amounts applied			0.6
Change in estimates			(0.1)
Ending Balance	2.7		2.7
Other Restructuring Costs | 2018 and Prior Plans
Restructuring Reserve [Roll Forward]
Beginning Balance			2.2
Restructuring and other costs			0.0
Amounts applied			0.0
Change in estimates			0.0
Ending Balance	2.2		2.2
Other Restructuring Costs | 2019 Plans
Restructuring Reserve [Roll Forward]
Beginning Balance			0.3
Restructuring and other costs			0.5
Amounts applied			0.7
Change in estimates			(0.1)
Ending Balance	0.0		0.0
Other Restructuring Costs | 2020 Plans
Restructuring Reserve [Roll Forward]
Beginning Balance			0.0
Restructuring and other costs			0.4
Amounts applied			0.1
Change in estimates			0.0
Ending Balance	$ 0.5		$ 0.5