Goodwill and Other Identifiable Intangible Assets (Carrying Amount of Goodwill) (Details) - USD ($) $ in Millions	9 Months Ended
Sep. 30, 2026	Dec. 31, 2025
Goodwill [Roll Forward]
Beginning Balance	$ 6,149
Acquisitions, including purchase accounting adjustments	89
Foreign currency impact	(90)
Ending Balance	6,147
Divestitures	(1)
Traffic Solutions
Goodwill [Roll Forward]
Goodwill, accumulated impairment loss	158	$ 158
Global Architectural Coatings
Goodwill [Roll Forward]
Beginning Balance	3,008
Acquisitions, including purchase accounting adjustments	0
Foreign currency impact	(61)
Ending Balance	2,947
Divestitures	0
Performance Coatings
Goodwill [Roll Forward]
Beginning Balance	1,914
Acquisitions, including purchase accounting adjustments	86
Foreign currency impact	(10)
Ending Balance	1,989
Divestitures	(1)
Industrial Coatings
Goodwill [Roll Forward]
Beginning Balance	1,227
Acquisitions, including purchase accounting adjustments	3
Foreign currency impact	(19)
Ending Balance	1,211
Divestitures	$ 0

Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

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