REVENUE (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2020	Jan. 01, 2020	Dec. 31, 2019	Mar. 31, 2019
Revenue from Contract with Customer [Abstract]
Accounts Receivable, Less Allowance		$ 2,291.5		$ 2,088.9	$ 2,339.6
Contract Assets (Current)		61.2		50.5
Contract Assets (Long-Term)		169.0		178.2
Contract Liabilities (Current)		175.6		242.8
Contract Liabilities (Long-Term)		10.6		10.4
Bad debt expense for incremental expected losses	$ 15.1
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	36.5
Adjustment upon adoption of ASU 2016-13	60.2	$ 60.2		$ 36.5
Bad debt expense	30.2
Uncollectible accounts written off, net of recoveries	(9.5)
Ending balance	$ 60.2
Adjustment upon adoption of ASU 2016-13
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Adjustment upon adoption of ASU 2016-13			$ 3.0