BUSINESS SEGMENT INFORMATION - Identifiable Assets by Segment (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Assets	$ 3,114.7	$ 3,195.6
Operating Segments | AWP
Segment Reporting Information [Line Items]
Assets	1,824.4	1,814.4
Operating Segments | MP
Segment Reporting Information [Line Items]
Assets	1,620.0	1,750.9
Corporate and Other / Eliminations
Segment Reporting Information [Line Items]
Assets	(335.0)	(379.5)
Discontinued Operations, Held-for-sale
Segment Reporting Information [Line Items]
Assets held for sale	$ 5.3	$ 9.8