REPORTABLE SEGMENT INFORMATION - Reportable Segment Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Segment Reporting Information [Line Items]
Net sales	$ 4,146.7	$ 4,040.9
Segment profit	585.5	517.7
Interest expense	(86.2)	(91.0)
Administrative expenses and other	(107.0)	(127.8)
Income before income taxes	392.3	298.9
Administrative
Segment Reporting Information [Line Items]
Net sales	1.3	0.7
Administrative and Eliminations
Segment Reporting Information [Line Items]
Net sales	(901.2)	(820.6)
Interest expense	(86.2)	(91.0)
Administrative expenses and other	(107.0)	(127.8)
Income before income taxes	(193.2)	(218.8)
Intersegment transfers
Segment Reporting Information [Line Items]
Net sales	(902.5)	(821.3)
The Americas Group
Segment Reporting Information [Line Items]
Net sales	2,305.5	2,154.9
The Americas Group | Operating Segments
Segment Reporting Information [Line Items]
Net sales	2,305.5	2,154.9
Segment profit	388.3	331.1
Income before income taxes	388.3	331.1
Consumer Brands Group
Segment Reporting Information [Line Items]
Net sales	622.3	654.5
Consumer Brands Group | Operating Segments
Segment Reporting Information [Line Items]
Net sales	1,492.8	1,447.3
Segment profit	83.5	87.9
Income before income taxes	83.5	87.9
Consumer Brands Group | Intersegment transfers
Segment Reporting Information [Line Items]
Net sales	(870.5)	(792.8)
Performance Coatings Group
Segment Reporting Information [Line Items]
Net sales	1,217.6	1,230.8
Performance Coatings Group | Operating Segments
Segment Reporting Information [Line Items]
Net sales	1,249.6	1,259.3
Segment profit	113.7	98.7
Income before income taxes	113.7	98.7
Performance Coatings Group | Intersegment transfers
Segment Reporting Information [Line Items]
Net sales	$ (32.0)	$ (28.5)