BUSINESS SEGMENT INFORMATION - Net Sales by Region (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Segment Reporting Information [Line Items]
Net sales	$ 1,038.7	$ 690.5	$ 1,902.9	$ 1,524.1
UNITED STATES
Segment Reporting Information [Line Items]
Net sales	522.8	384.4	938.5	815.5
North America
Segment Reporting Information [Line Items]
Net sales	581.1	419.9	1,033.7	891.2
Western Europe
Segment Reporting Information [Line Items]
Net sales	233.4	112.1	446.1	306.7
Asia-Pacific
Segment Reporting Information [Line Items]
Net sales	171.2	123.1	324.0	233.4
Rest of World
Segment Reporting Information [Line Items]
Net sales	53.0	35.4	99.1	92.8
Corporate and Other / Eliminations
Segment Reporting Information [Line Items]
Net sales	2.7	13.0	12.0	19.3
Corporate and Other / Eliminations | North America
Segment Reporting Information [Line Items]
Net sales	5.2	19.3	15.4	33.7
Corporate and Other / Eliminations | Western Europe
Segment Reporting Information [Line Items]
Net sales	0.1	0.1	0.2	0.2
Corporate and Other / Eliminations | Asia-Pacific
Segment Reporting Information [Line Items]
Net sales	0.2	1.1	0.4	1.3
Corporate and Other / Eliminations | Rest of World
Segment Reporting Information [Line Items]
Net sales	(2.8)	(7.5)	(4.0)	(15.9)
AWP | Operating Segments
Segment Reporting Information [Line Items]
Net sales	595.2	413.9	1,071.9	925.6
AWP | Operating Segments | North America
Segment Reporting Information [Line Items]
Net sales	393.2	276.8	689.2	619.3
AWP | Operating Segments | Western Europe
Segment Reporting Information [Line Items]
Net sales	89.7	41.8	184.0	130.6
AWP | Operating Segments | Asia-Pacific
Segment Reporting Information [Line Items]
Net sales	90.8	75.4	161.1	126.5
AWP | Operating Segments | Rest of World
Segment Reporting Information [Line Items]
Net sales	21.5	19.9	37.6	49.2
MP | Operating Segments
Segment Reporting Information [Line Items]
Net sales	440.8	263.6	819.0	579.2
MP | Operating Segments | North America
Segment Reporting Information [Line Items]
Net sales	182.7	123.8	329.1	238.2
MP | Operating Segments | Western Europe
Segment Reporting Information [Line Items]
Net sales	143.6	70.2	261.9	175.9
MP | Operating Segments | Asia-Pacific
Segment Reporting Information [Line Items]
Net sales	80.2	46.6	162.5	105.6
MP | Operating Segments | Rest of World
Segment Reporting Information [Line Items]
Net sales	$ 34.3	$ 23.0	$ 65.5	$ 59.5