Goodwill and Other Identifiable Intangible Assets (Carrying Amount of Goodwill) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Goodwill [Roll Forward]
Beginning Balance	$ 6,200
Acquisitions, including purchase accounting adjustments	3
Foreign currency impact	(63)
Ending Balance	6,140	$ 6,200
Traffic Solutions
Goodwill [Roll Forward]
Goodwill, impairment loss	158	158
Performance Coatings
Goodwill [Roll Forward]
Beginning Balance	4,994
Acquisitions, including purchase accounting adjustments	3
Foreign currency impact	(47)
Ending Balance	4,950	4,994
Industrial Coatings
Goodwill [Roll Forward]
Beginning Balance	1,206
Acquisitions, including purchase accounting adjustments	0
Foreign currency impact	(16)
Ending Balance	$ 1,190	$ 1,206