SUPPLEMENTAL CASH FLOW DISCLOSURES (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Supplemental Cash Flow Elements [Abstract]
Interest paid during the year	$ 193.1	$ 81.8	$ 75.3
Income taxes paid during the year, net of amount refunded	99.5	83.9	89.4
Fair value of assets acquired	12,612.9	91.8	452.2
Liabilities assumed	2,466.3	32.9	207.8
Non-controlling interest (acquired) assumed	30.9	0.0	(761.8)
Stock and cash paid	10,115.7	58.9	1,006.2
Less: Cash acquired	179.6	7.7	35.4
Stock used for acquisition	6,939.7	0.0	25.5
Net cash paid	$ 2,996.4	$ 51.2	$ 945.3