Goodwill and Other Identifiable Intangible Assets (Carrying Amount of Goodwill Attributable to Each Reportable Segment) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Goodwill [Roll Forward]
Beginning Balance	$ 3,572	$ 3,625
Goodwill from acquisitions	112	174
Currency translation	258	(227)
Ending Balance	3,942	3,572
Performance Coatings Segment
Goodwill [Roll Forward]
Beginning Balance	2,870	3,073
Goodwill from acquisitions	23	6
Currency translation	211	(209)
Ending Balance	3,104	2,870
Industrial Coatings Segment
Goodwill [Roll Forward]
Beginning Balance	702	552
Goodwill from acquisitions	89	168
Currency translation	47	(18)
Ending Balance	$ 838	$ 702