DISCONTINUED OPERATIONS AND OTHER DIVESTITURES - Additional Information (Details) $ / shares in Units, $ in Millions				1 Months Ended	3 Months Ended			12 Months Ended
	Feb. 22, 2019 USD ($)	Mar. 23, 2017 € / shares	Jan. 04, 2017 USD ($) shares	Dec. 31, 2016 USD ($)	Mar. 31, 2019 USD ($) $ / shares	Sep. 30, 2017 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (loss) on disposition of discontinued operations – net of tax								$ 2.4	$ 68.7	$ 3.5
Gain (loss) on long term contract									7.9
Transaction costs										14.2
Asset impairments										3.0
Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (loss) on disposition of discontinued operations – net of tax								2.4	68.7
Cranes
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Non-cash impairment charge				$ 1.6				1.8	6.7
Construction
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Non-cash impairment charge				$ 3.5
Materials Handling and Port Solutions Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Asset impairments										3.0
Materials Handling and Port Solutions Sale | Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Equity interest receivable (in shares) | shares			19,600,000.0
Proceeds from divestiture of businesses			$ 835.0
Gain (loss) on disposition of discontinued operations – net of tax								(3.1)	65.7
Cranes Manufacturing Facility | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (loss) on disposition of business						$ 5.7
Coventry | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (loss) on disposition of business									(1.2)
Indian | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (loss) on disposition of business									(1.6)
Construction Segment Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Non-cash impairment charge										8.1
Loss (gain) on write-down, net of tax										5.6
Construction Segment Sale | Cost of Sales
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Non-cash impairment charge										4.0
Construction Segment Sale | Selling, General and Administrative Expenses
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Non-cash impairment charge										4.1
Construction Segment Sale, Midi/Mini Excavators, Wheeled Excavators and Compact Wheel Loader Business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from divestiture of businesses										60.0
Non-cash impairment charge										7.2
Loss (gain) on write-down, net of tax										3.3
Germany Business | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Post-closing adjustment									5.8
Atlas Member | Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (loss) on disposition of discontinued operations – net of tax								$ 2.7	3.0	3.5
Konecranes Plc
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of available-for-sale securities, equity									770.0
Realized gain (loss) on disposal									42.0
Realized gain (loss) on disposal, attributable to foreign exchange rate changes									$ 41.6
Proceeds from equity method investment, dividends or distributions							$ 13.5
Konecranes Plc
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Common stock dividends declared (in dollars per share) | € / shares		€ 1.05
Merger
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Acquisition related costs										$ 14.0
Subsequent Event
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Common stock dividends declared (in dollars per share) | $ / shares					$ 0.11
Subsequent Event | Demag-Mobile Cranes Business | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from divestiture of businesses	$ 215.0
Scenario, Forecast | Subsequent Event | Demag-Mobile Cranes Business | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (loss) on disposal					$ (100.0)
Accumulated Other Comprehensive Income (Loss) | Scenario, Forecast | Subsequent Event | Demag-Mobile Cranes Business | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (loss) on disposal					$ (55.0)