STOCKHOLDERS’ EQUITY (Reclassification out of Other Comprehensive Income) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Reclassification out of Accumulated Other Comprehensive Income
Revenue	$ (1,632.0)	$ (1,582.6)
Selling, general and administrative expense	(147.6)	(195.3)
Other income (expense), net	35.6	(7.9)
Income (loss) before income taxes	456.6	(3,251.1)
Provision for income taxes	24.5	(23.2)
Net income (loss)	371.9	(3,245.7)
Amount Reclassified out of Accumulated Other Comprehensive Loss
Reclassification out of Accumulated Other Comprehensive Income
Income (loss) before income taxes	(7.0)	(3.1)
Provision for income taxes	(2.1)	(0.6)
Net income (loss)	(4.9)	(2.5)
Amount Reclassified out of Accumulated Other Comprehensive Loss | Accumulated Defined Benefit Plans Adjustment Attributable to Parent
Reclassification out of Accumulated Other Comprehensive Income
Amortization of prior service credit (cost)	(0.1)	(0.3)
Amortization of net actuarial loss	(6.9)	(2.8)
Foreign exchange contracts | Cash Flow Hedging | Amount Reclassified out of Accumulated Other Comprehensive Loss | Hedging
Reclassification out of Accumulated Other Comprehensive Income
Revenue	10.4	11.1
Cost of sales	8.3	9.8
Selling, general and administrative expense	0.1	0.0
Other income (expense), net	4.0	1.0
Income (loss) before income taxes	2.0	(0.3)
Provision for income taxes	(0.7)	(0.2)
Net income (loss)	$ 2.7	$ (0.1)