ACQUISITIONS - Summary of Estimated Fair Value of Assets Acquired and Liabilities Assumed for Annax (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018	Mar. 22, 2018
Business Acquisition [Line Items]
Goodwill	$ 8,360.6	$ 2,396.5
Annax GmbH
Business Acquisition [Line Items]
Current assets, net of cash acquired			$ 32.8
Property, plant & equipment			0.7
Goodwill			38.5
Other intangible assets			11.7
Total assets acquired			83.7
Total liabilities assumed			(55.1)
Net assets acquired			$ 28.6