REPORTABLE SEGMENT INFORMATION - Schedule of Reportable Segment Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Segment Reporting Information [Line Items]
Net sales	$ 5,305.7	$ 5,367.3
Cost of goods sold	2,746.6	2,836.3
Selling, general and administrative expenses	1,793.8	1,799.8
Interest expense	103.8	103.0
Other segment items	8.5	(11.8)
Income before income taxes	$ 653.0	$ 640.0
% to Net Sales	12.30%	11.90%
Capital expenditures	$ 189.3	$ 283.8
Depreciation	79.9	71.1
Amortization	81.0	82.1
Identifiable assets	24,636.1	23,428.1	$ 23,632.6
Administrative
Segment Reporting Information [Line Items]
Net sales	1.7	1.4
Intersegment transfers
Segment Reporting Information [Line Items]
Net sales	(1,226.3)	(1,248.9)
Administrative and Eliminations
Segment Reporting Information [Line Items]
Net sales	(1,224.6)	(1,247.5)
Cost of goods sold	(1,230.0)	(1,245.7)
Selling, general and administrative expenses	131.6	152.6
Interest expense	103.8	103.0
Other segment items	2.8	(13.1)
Income before income taxes	(232.8)	(244.3)
Capital expenditures	93.3	167.4
Depreciation	7.1	6.8
Amortization	0.3	0.5
Identifiable assets	3,264.4	2,423.7	3,052.5
Paint Stores Group
Segment Reporting Information [Line Items]
Net sales	2,939.8	2,873.0
Paint Stores Group | Operating Segments
Segment Reporting Information [Line Items]
Net sales	2,939.8	2,873.0
Cost of goods sold	1,307.9	1,320.9
Selling, general and administrative expenses	1,093.0	1,065.8
Interest expense	0.0	0.0
Other segment items	(2.3)	(6.9)
Income before income taxes	$ 541.2	$ 493.2
% to Net Sales	18.40%	17.20%
Capital expenditures	$ 26.7	$ 35.7
Depreciation	22.1	21.4
Amortization	0.4	0.8
Identifiable assets	6,143.8	5,936.5	5,878.0
Consumer Brands Group
Segment Reporting Information [Line Items]
Net sales	762.2	811.0
Consumer Brands Group | Intersegment transfers
Segment Reporting Information [Line Items]
Net sales	1,221.0	1,211.8
Consumer Brands Group | Operating Segments
Segment Reporting Information [Line Items]
Net sales	1,983.2	2,022.8
Cost of goods sold	1,632.7	1,639.6
Selling, general and administrative expenses	217.7	223.1
Interest expense	0.0	0.0
Other segment items	0.9	6.7
Income before income taxes	$ 131.9	$ 153.4
% to Net Sales	17.30%	18.90%
Capital expenditures	$ 56.9	$ 80.7
Depreciation	45.9	37.2
Amortization	16.8	17.0
Identifiable assets	7,156.8	6,850.6	6,854.7
Performance Coatings Group
Segment Reporting Information [Line Items]
Net sales	1,602.0	1,681.9
Performance Coatings Group | Intersegment transfers
Segment Reporting Information [Line Items]
Net sales	5.3	37.1
Performance Coatings Group | Operating Segments
Segment Reporting Information [Line Items]
Net sales	1,607.3	1,719.0
Cost of goods sold	1,036.0	1,121.5
Selling, general and administrative expenses	351.5	358.3
Interest expense	0.0	0.0
Other segment items	7.1	1.5
Income before income taxes	$ 212.7	$ 237.7
% to Net Sales	13.30%	14.10%
Capital expenditures	$ 12.4	$ 0.0
Depreciation	4.8	5.7
Amortization	63.5	63.8
Identifiable assets	$ 8,071.1	$ 8,217.3	$ 7,847.4