GOODWILL AND INTANGIBLE ASSETS (Components of identifiable intangible assets) (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross (Excluding Goodwill)	$ 5,953.1	$ 5,885.6
Accumulated Amortization	(2,032.6)	(1,851.1)
Intangible Assets, Net (Excluding Goodwill)	3,920.5	4,034.5
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross (Excluding Goodwill)	4,530.7	4,441.7
Accumulated Amortization	(1,473.1)	(1,329.5)
Intangible Assets, Net (Excluding Goodwill)	3,057.6	3,112.2
Patents, Licenses And Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross (Excluding Goodwill)	427.7	453.6
Accumulated Amortization	(245.3)	(235.7)
Intangible Assets, Net (Excluding Goodwill)	182.4	217.9
Noncompete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross (Excluding Goodwill)	105.3	90.9
Accumulated Amortization	(67.6)	(60.5)
Intangible Assets, Net (Excluding Goodwill)	37.7	30.4
Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross (Excluding Goodwill)	410.2	408.2
Accumulated Amortization	(240.1)	(219.9)
Intangible Assets, Net (Excluding Goodwill)	170.1	188.3
Use Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross (Excluding Goodwill)	10.8	10.9
Accumulated Amortization	(6.5)	(5.5)
Intangible Assets, Net (Excluding Goodwill)	4.3	5.4
Canadian licenses [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross (Excluding Goodwill)	468.4	480.3
Accumulated Amortization	0.0	0.0
Intangible Assets, Net (Excluding Goodwill)	$ 468.4	$ 480.3