Revenue Recognition - Schedule Of Revenue By Revenue Source (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2026 USD ($)	Sep. 30, 2025 USD ($)	Sep. 30, 2026 USD ($)	Sep. 30, 2025 USD ($)
Disaggregation of Revenue [Line Items]
Net sales	$ 4,353	$ 4,082	$ 12,778	$ 11,961
United States and Canada
Disaggregation of Revenue [Line Items]
Net sales	1,446	1,374	4,227	4,153
EMEA
Disaggregation of Revenue [Line Items]
Net sales	1,442	1,375	4,412	4,081
Asia Pacific
Disaggregation of Revenue [Line Items]
Net sales	846	768	2,364	2,142
Latin America
Disaggregation of Revenue [Line Items]
Net sales	619	565	1,775	1,585
Performance Coatings
Disaggregation of Revenue [Line Items]
Net sales	1,554	1,414	4,507	4,191
Performance Coatings \| United States and Canada
Disaggregation of Revenue [Line Items]
Net sales	875	812	2,517	2,472
Performance Coatings \| EMEA
Disaggregation of Revenue [Line Items]
Net sales	361	332	1,101	974
Performance Coatings \| Asia Pacific
Disaggregation of Revenue [Line Items]
Net sales	287	243	802	666
Performance Coatings \| Latin America
Disaggregation of Revenue [Line Items]
Net sales	31	27	87	79
Industrial Coatings
Disaggregation of Revenue [Line Items]
Net sales	1,744	1,656	5,153	4,883
Industrial Coatings \| United States and Canada
Disaggregation of Revenue [Line Items]
Net sales	571	562	1,710	1,681
Industrial Coatings \| EMEA
Disaggregation of Revenue [Line Items]
Net sales	458	417	1,426	1,282
Industrial Coatings \| Asia Pacific
Disaggregation of Revenue [Line Items]
Net sales	503	470	1,401	1,326
Industrial Coatings \| Latin America
Disaggregation of Revenue [Line Items]
Net sales	212	207	616	594
Global Architectural Coatings
Disaggregation of Revenue [Line Items]
Net sales	1,055	1,012	3,118	2,887
Global Architectural Coatings \| EMEA
Disaggregation of Revenue [Line Items]
Net sales	623	626	1,885	1,825
Global Architectural Coatings \| Asia Pacific
Disaggregation of Revenue [Line Items]
Net sales	56	55	161	150
Global Architectural Coatings \| Latin America
Disaggregation of Revenue [Line Items]
Net sales	$ 376	$ 331	$ 1,072	$ 912
Revenue from Contract with Customer \| Service \| Product Concentration Risk
Disaggregation of Revenue [Line Items]
Revenue, percentage of total revenue	0.05	0.05	0.05	0.05