Reportable Segment Information (Segment Net Sales and Income) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	$ 3,817	$ 3,776	$ 11,729	$ 11,066
Segment income (loss)	500	590	1,670	1,819
Corporate	(26)	(46)	(92)	(134)
Interest expense, net of interest income	(25)	(22)	(70)	(65)
Legacy items	0	1	5	(4)
Business restructuring charge	12	0	(71)	0
Restructuring and related cost, accelerated depreciation	(4)	0	(9)	0
Legacy legal settlements	0	0	(10)	18
Accounting investigation costs	(2)	0	(11)	0
Impairment of a non-manufacturing asset	0	0	(9)	0
Costs related to customer assortment change	(4)	0	(18)	0
Environmental remediation charges	0	0	(34)	0
Gain from sale of a business		0	0	25
Transaction-related (costs) gain, net	0	0	0	(9)
Pension settlement charge	0	0	0	(22)
Income from continuing operations before income taxes	451	523	1,351	1,628
Performance Coatings [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	2,289	2,290	6,947	6,606
Segment income (loss)	331	365	1,039	1,054
Industrial Coatings [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	1,528	1,486	4,782	4,460
Segment income (loss)	169	$ 225	631	$ 765
Mexican Plaka Business [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Gain from sale of a business	$ 0		$ 0