DISCONTINUED OPERATIONS AND ASSETS AND LIABILITIES HELD FOR SALE - Supplemental Cash Flow Information Related to Discontinued Operations (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019	Dec. 31, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash and cash equivalents	$ 511.3		$ 535.1
Total cash and cash equivalents	515.0	$ 330.2	540.1	$ 372.1
Impairments	0.1	86.1
Demag-Mobile Cranes Business [Member] \| Discontinued Operations, Held-for-sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash and cash equivalents - held for sale	3.7		$ 5.0
Depreciation and amortization	0.0	2.2
Impairments	0.1	86.1
Deferred taxes	0.0	(3.3)
Capital expenditures	$ 0.0	$ (1.6)

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