BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Changes in Allowances) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance as of January 1,	$ 282.4	$ 131.0	$ 45.9
Current year increases	104.3	157.8	87.2
Write-offs, recoveries and other	(223.4)	(6.4)	(2.1)
Balance as of December 31,	$ 163.3	$ 282.4	$ 131.0