RESTRUCTURING AND OTHER COSTS - RESTRUCTURING ACCURALS (Details) $ in Millions	6 Months Ended
	Jun. 30, 2017 USD ($)
Restructuring Reserve [Roll Forward]
Beginning Balance	$ 32.5
Provisions	4.0
Amounts applied	(11.6)
Change in estimates	(0.3)
Ending Balance	24.6
Severance
Restructuring Reserve [Roll Forward]
Beginning Balance	28.8
Provisions	1.6
Amounts applied	(8.5)
Change in estimates	(0.7)
Ending Balance	21.2
Severance | 2015 and Prior Plans
Restructuring Reserve [Roll Forward]
Beginning Balance	20.6
Provisions	0.4
Amounts applied	(4.8)
Change in estimates	(0.6)
Ending Balance	15.6
Severance | 2016 Plans
Restructuring Reserve [Roll Forward]
Beginning Balance	8.2
Provisions	(0.2)
Amounts applied	(3.1)
Change in estimates	(0.1)
Ending Balance	4.8
Severance | 2017 Plans
Restructuring Reserve [Roll Forward]
Beginning Balance	0.0
Provisions	1.4
Amounts applied	(0.6)
Change in estimates	0.0
Ending Balance	0.8
Lease/Contract Terminations
Restructuring Reserve [Roll Forward]
Beginning Balance	3.0
Provisions	0.5
Amounts applied	(1.3)
Change in estimates	(0.1)
Ending Balance	2.1
Lease/Contract Terminations | 2015 and Prior Plans
Restructuring Reserve [Roll Forward]
Beginning Balance	2.7
Provisions	0.4
Amounts applied	(1.1)
Change in estimates	(0.1)
Ending Balance	1.9
Lease/Contract Terminations | 2016 Plans
Restructuring Reserve [Roll Forward]
Beginning Balance	0.3
Provisions	0.0
Amounts applied	(0.1)
Change in estimates	0.0
Ending Balance	0.2
Lease/Contract Terminations | 2017 Plans
Restructuring Reserve [Roll Forward]
Beginning Balance	0.0
Provisions	0.1
Amounts applied	(0.1)
Change in estimates	0.0
Ending Balance	0.0
Other Restructuring Costs
Restructuring Reserve [Roll Forward]
Beginning Balance	0.7
Provisions	1.9
Amounts applied	(1.8)
Change in estimates	0.5
Ending Balance	1.3
Other Restructuring Costs | 2015 and Prior Plans
Restructuring Reserve [Roll Forward]
Beginning Balance	0.5
Provisions	0.7
Amounts applied	(0.7)
Change in estimates	0.5
Ending Balance	1.0
Other Restructuring Costs | 2016 Plans
Restructuring Reserve [Roll Forward]
Beginning Balance	0.2
Provisions	0.9
Amounts applied	(0.9)
Change in estimates	0.0
Ending Balance	0.2
Other Restructuring Costs | 2017 Plans
Restructuring Reserve [Roll Forward]
Beginning Balance	0.0
Provisions	0.3
Amounts applied	(0.2)
Change in estimates	0.0
Ending Balance	$ 0.1