GOODWILL AND INTANGIBLE ASSETS - RECONCILIATION OF CHANGES IN GOODWILL (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Goodwill [Roll Forward]
Balance, beginning of the year			$ 3,396,500,000
Impairment	$ 0	$ 0	(156,600,000)	$ 0
Effects of exchange rate changes			42,800,000
Balance, end of the year	3,282,700,000		3,282,700,000
Technologies & Equipment
Goodwill [Roll Forward]
Balance, beginning of the year			2,515,700,000
Impairment			(156,600,000)
Effects of exchange rate changes			44,300,000
Balance, end of the year	2,403,400,000		2,403,400,000
Consumables
Goodwill [Roll Forward]
Balance, beginning of the year			880,800,000
Impairment			0
Effects of exchange rate changes			(1,500,000)
Balance, end of the year	$ 879,300,000		$ 879,300,000