Goodwill and Other Identifiable Intangible Assets (Carrying Amount of Goodwill Attributable to Each Reportable Segment) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Goodwill [Roll Forward]
Beginning Balance	$ 5,690	$ 6,115
Acquisitions, including purchase accounting adjustments		2
Divestitures		2
Foreign currency impact and other	459	(425)
Ending Balance	6,149	5,690	$ 6,115
Traffic Solutions
Goodwill [Roll Forward]
Goodwill impairment			(158)
Performance Coatings Segment
Goodwill [Roll Forward]
Beginning Balance	1,854	1,913
Acquisitions, including purchase accounting adjustments		2
Divestitures		0
Foreign currency impact and other	60	(61)
Ending Balance	1,914	1,854	1,913
Industrial Coatings Segment
Goodwill [Roll Forward]
Beginning Balance	1,148	1,206
Divestitures		2
Foreign currency impact and other	79	(56)
Ending Balance	1,227	1,148	1,206
Global Architectural Coatings
Goodwill [Roll Forward]
Beginning Balance	2,688	2,996
Divestitures		0
Foreign currency impact and other	320	(308)
Ending Balance	$ 3,008	$ 2,688	$ 2,996