Goodwill and Other Identifiable Intangible Assets (Carrying Amount of Goodwill) (Details) $ in Millions	9 Months Ended
Sep. 30, 2019 USD ($)
Goodwill [Roll Forward]
Beginning Balance	$ 4,070
Acquisitions	359
Currency	(94)
Ending Balance	4,335
Performance Coatings [Member]
Goodwill [Roll Forward]
Beginning Balance	3,266
Acquisitions	130
Currency	(71)
Ending Balance	3,325
Industrial Coatings [Member]
Goodwill [Roll Forward]
Beginning Balance	804
Acquisitions	229
Currency	(23)
Ending Balance	$ 1,010

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of increase (decrease) from adjustments after acquisition date under purchase accounting of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of increase (decrease) from foreign currency translation adjustments and purchase accounting adjustments of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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