INCOME TAXES (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Income Tax Disclosure [Abstract]
Effective income tax rate, excluding discrete items			23.80%	24.70%
Income taxes	$ 68.3	$ 36.1	$ 136.5	$ 99.5
Effective income tax rate	37.50%	75.20%	71.00%	341.90%
Accrual of tax benefits associated with changes in legislation	$ 14.0		$ 14.0
Tax contingency	3.1		10.9
Other net benefits	1.9		1.0
Recognition of deferred tax assets			4.1
Unrecognized tax benefits, increase	66.2
Increase in unrecognized tax benefits is reasonably possible	20.0		20.0
Unrecognized tax benefits	123.1		123.1
Unrecognized tax benefits, favorable impact	$ 120.7		$ 120.7