ACCUMULATED OTHER COMPREHENSIVE LOSS - Schedule of Amounts Reclassified from Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019
Affected Line on Consolidated Condensed Statements of Operations
Other income, net	$ 5.7			$ 4.6			$ 7.3	$ 7.8
Provision for income taxes	(39.1)			(27.0)			(46.7)	(84.3)
Net income	325.2	$ (121.9)	$ 310.6	274.7	$ 242.3	$ 249.7	513.9	766.7
Cost of sales	(281.0)			(292.4)			(784.3)	(828.2)
Selling, general, and administrative expenses	(307.2)			(306.2)			(889.9)	(895.0)
Total before tax	364.3			301.7			560.6	851.0
Amount Reclassified from Accumulated Other Comprehensive Loss | Foreign Currency Translation Adjustments
Affected Line on Consolidated Condensed Statements of Operations
Other income, net	1.6			1.7			4.9	5.0
Provision for income taxes	(0.4)			(0.4)			(1.2)	(1.2)
Net income	1.2			1.3			3.7	3.8
Amount Reclassified from Accumulated Other Comprehensive Loss | Unrealized Gain (Loss) on Hedges
Affected Line on Consolidated Condensed Statements of Operations
Provision for income taxes	(1.4)			(3.5)			(5.4)	(8.3)
Net income	4.1			12.0			15.9	22.7
Cost of sales	5.9			12.8			19.7	31.7
Selling, general, and administrative expenses	0.3			0.6			2.0	1.4
Other income, net	(0.7)			2.1			(0.4)	(2.1)
Total before tax	5.5			15.5			21.3	31.0
Amount Reclassified from Accumulated Other Comprehensive Loss | Gain (loss) on available-for-sale investments
Affected Line on Consolidated Condensed Statements of Operations
Other income, net	(0.1)			0.0			(0.2)	(0.3)
Provision for income taxes	0.0			0.0			(0.3)	0.0
Net income	$ (0.1)			$ 0.0			$ (0.5)	$ (0.3)