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ACQUISITIONS AND DIVESTITURES - Narrative (Details) - USD ($) $ in Millions	1 Months Ended					3 Months Ended		12 Months Ended
	Oct. 31, 2025	Mar. 31, 2025	Oct. 31, 2024	Oct. 31, 2023	Apr. 30, 2023	Sep. 30, 2023	Jun. 30, 2023	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Business Combination [Line Items]
Goodwill								$ 8,036.6	$ 7,580.1	$ 7,626.0	$ 7,583.2
Gain on disposition of business								0.0	0.0	20.1
Impairment charge								17.8	0.0	57.9
Consumer Brands Group
Business Combination [Line Items]
Goodwill								2,032.8	1,792.5	$ 1,792.8	$ 1,801.9
China Architectural Business | Consumer Brands Group
Business Combination [Line Items]
Impairment charge						$ 6.9
Administrative | Non-core Domestic Aerosol Business
Business Combination [Line Items]
Gain on disposition of business					$ 20.1
Administrative | China Architectural Business
Business Combination [Line Items]
Impairment charge							$ 27.1
Suvinil
Business Combination [Line Items]
Payments to acquire businesses	$ 1,150.0
Finite lived assets acquired								608.7
Goodwill								247.8
Liabilities recognized								$ 173.5
European Coil And Industrial Coatings Company
Business Combination [Line Items]
Payments to acquire businesses		$ 80.0
Metal Packaging Coating Business
Business Combination [Line Items]
Payments to acquire businesses			$ 80.0
Finite lived assets acquired									27.9
2023 Acquisitions
Business Combination [Line Items]
Purchase price				$ 290.0
Finite lived assets acquired									110.8
Goodwill									181.3
Other assets									46.0
Liabilities recognized									$ 47.5

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