COMPREHENSIVE INCOME - RECLASSIFICATION OUT OF ACCUMULATED OTHER COMPREHENSIVE INCOME (EXPENSE) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Interest expense	$ (29.4)	$ (37.3)	$ (38.3)
Cost of products sold	(1,864.1)	(1,918.5)	(1,804.9)
Net (loss) gain before tax	345.4	(958.4)	(1,603.5)
Provision (benefit) for income taxes	(82.3)	(52.5)	53.2
Other expense (income), net	11.5	34.9	(5.3)
Net gain after tax	263.1	(1,010.9)	(1,550.3)
Net of tax	(5.1)	30.2	(7.5)
(Loss) gain on derivative financial instruments: | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Net (loss) gain before tax	(1.4)	(11.2)	(5.3)
Provision (benefit) for income taxes	0.0	1.5	2.7
Net gain after tax	(1.4)	(9.7)	(2.6)
(Loss) gain on derivative financial instruments: | Reclassification out of Accumulated Other Comprehensive Income | Interest rate swaps
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Interest expense	(2.4)	(2.3)	(2.3)
(Loss) gain on derivative financial instruments: | Reclassification out of Accumulated Other Comprehensive Income | Foreign exchange forward contracts
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Cost of products sold	1.0	(8.9)	(3.0)
Realized gain on available-for-sale securities: | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Provision (benefit) for income taxes	0.0	(0.7)	0.0
Other expense (income), net	0.0	45.0	0.0
Net gain after tax	0.0	44.3	0.0
Pension Liability Gain (Loss)
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Amortization of defined benefit pension and other postemployment benefit items:	(5.1)	(6.1)	(6.8)
Provision (benefit) for income taxes	1.4	1.7	1.9
Net of tax	(3.7)	(4.4)	(4.9)
Amortization of prior service benefits
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Amortization of defined benefit pension and other postemployment benefit items:	0.5	0.2	0.2
Amortization of net actuarial losses
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Amortization of defined benefit pension and other postemployment benefit items:	$ 5.6	$ 6.3	$ 7.0