VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2017		Dec. 31, 2016		Dec. 31, 2015
Allowance for Doubtful Accounts Receivable [Member]
Balance at Beginning of Period		$ 122.9		$ 77.6		$ 93.7
Charged to Costs and Expenses		221.9		190.5		144.1
Charged to Revenue		0.0		0.0		0.0
Deductions	[1]	(215.5)		(145.2)		(160.2)
Balance at End of Period		129.3		122.9		77.6
Allowance for Sales Returns [Member]
Balance at Beginning of Period		8.2		9.1		13.2
Charged to Costs and Expenses		0.0		0.0		0.0
Charged to Revenue		197.9		186.9		190.8
Deductions	[2]	(196.8)		(187.8)		(194.9)
Balance at End of Period		9.3		8.2		9.1
Inventory Valuation Reserve [Member]
Balance at Beginning of Period		58.4		71.3		98.9
Charged to Costs and Expenses		36.7		36.5		45.4
Charged to Revenue		0.0		0.0		0.0
Deductions	[3]	(33.8)		(49.4)		(73.0)
Balance at End of Period		61.3		58.4		71.3
Deferred Tax Asset Valuation Allowance [Member]
Balance at Beginning of Period		3,296.0		2,090.1		1,480.6
Charged to Costs and Expenses		(78.4)	[4]	1,205.9	[5]	609.5	[5]
Charged to Revenue		0.0		0.0		0.0
Deductions		0.0		0.0		0.0
Balance at End of Period		$ 3,217.6		$ 3,296.0		$ 2,090.1

[1] Accounts written off, net of recoveries and foreign currency translation adjustment.

[2] Returned product reused or destroyed and foreign currency translation adjustment.

[3] Obsolete inventory destroyed and foreign currency translation adjustment.

[4] Decrease in valuation allowance primarily related to a partial release of the U.S. valuation allowance as a result of the enactment of the Tax Cuts and Jobs Act in the U.S. and the impact of a

[5] Increase in valuation allowance primarily for deferred tax assets that are not more likely than not to be realized in the future.