BUSINESS SEGMENT INFORMATION - Net Sales by Region (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Segment Reporting Information [Line Items]
Net sales	$ 993.8	$ 765.6	$ 2,896.7	$ 2,289.7
UNITED STATES
Segment Reporting Information [Line Items]
Net sales	490.3	386.2	1,400.0	1,200.0
North America
Segment Reporting Information [Line Items]
Net sales	545.6	417.7	1,579.3	1,308.9
Western Europe
Segment Reporting Information [Line Items]
Net sales	199.9	150.2	646.0	456.9
Asia-Pacific
Segment Reporting Information [Line Items]
Net sales	176.5	153.8	500.5	387.2
Rest of World
Segment Reporting Information [Line Items]
Net sales	71.8	43.9	170.9	136.7
Corporate and Other / Eliminations
Segment Reporting Information [Line Items]
Net sales	2.6	9.3	14.6	28.6
Corporate and Other / Eliminations | North America
Segment Reporting Information [Line Items]
Net sales	8.3	16.0	23.7	49.7
Corporate and Other / Eliminations | Western Europe
Segment Reporting Information [Line Items]
Net sales	0.2	0.0	0.4	0.2
Corporate and Other / Eliminations | Asia-Pacific
Segment Reporting Information [Line Items]
Net sales	0.5	0.2	0.9	1.5
Corporate and Other / Eliminations | Rest of World
Segment Reporting Information [Line Items]
Net sales	(6.4)	(6.9)	(10.4)	(22.8)
AWP | Operating Segments
Segment Reporting Information [Line Items]
Net sales	572.5	445.0	1,644.4	1,370.6
AWP | Operating Segments | North America
Segment Reporting Information [Line Items]
Net sales	377.5	278.4	1,066.7	897.7
AWP | Operating Segments | Western Europe
Segment Reporting Information [Line Items]
Net sales	81.8	55.6	265.8	186.2
AWP | Operating Segments | Asia-Pacific
Segment Reporting Information [Line Items]
Net sales	80.5	89.3	241.6	215.8
AWP | Operating Segments | Rest of World
Segment Reporting Information [Line Items]
Net sales	32.7	21.7	70.3	70.9
MP | Operating Segments
Segment Reporting Information [Line Items]
Net sales	418.7	311.3	1,237.7	890.5
MP | Operating Segments | North America
Segment Reporting Information [Line Items]
Net sales	159.8	123.3	488.9	361.5
MP | Operating Segments | Western Europe
Segment Reporting Information [Line Items]
Net sales	117.9	94.6	379.8	270.5
MP | Operating Segments | Asia-Pacific
Segment Reporting Information [Line Items]
Net sales	95.5	64.3	258.0	169.9
MP | Operating Segments | Rest of World
Segment Reporting Information [Line Items]
Net sales	$ 45.5	$ 29.1	$ 111.0	$ 88.6