BUSINESS SEGMENT INFORMATION - Identifiable Assets by Segment (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Assets	$ 3,160.7	$ 3,485.9
Operating Segments | AWP
Segment Reporting Information [Line Items]
Assets	1,922.7	1,983.5
Operating Segments | MP
Segment Reporting Information [Line Items]
Assets	1,156.7	1,160.1
Corporate and Other / Eliminations
Segment Reporting Information [Line Items]
Assets	62.3	(185.6)
Discontinued Operations, Held-for-sale
Segment Reporting Information [Line Items]
Assets held for sale (2)	$ 19.0	$ 527.9