Reportable Segment Information (Segment Net Sales and Income) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	$ 4,131	$ 3,804	$ 7,912	$ 7,290
Segment income (loss)	651	669	1,170	1,229
Corporate	(23)	(27)	(66)	(88)
Interest expense, net of interest income	(24)	(22)	(45)	(43)
Legacy items	1	1	5	(5)
Business restructuring charge	(83)	0	(83)	0
Restructuring and related cost, accelerated depreciation	(5)	0	(5)	0
Legacy legal settlements	(10)	18	(10)	18
Accounting investigation costs	(9)	0	(9)	0
Impairment of a non-manufacturing asset	(9)	0	(9)	0
Costs related to customer assortment change	(10)	0	(14)	0
Environmental remediation charges	0	0	(34)	0
Gain from sale of a business		25	0	25
Transaction-related (costs) gain, net	0	(5)	0	(9)
Pension settlement charge	0	0	0	(22)
Income from continuing operations before income taxes	479	659	900	1,105
Performance Coatings [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	2,498	2,299	4,658	4,316
Segment income (loss)	428	405	708	689
Industrial Coatings [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	1,633	1,505	3,254	2,974
Segment income (loss)	223	$ 264	462	$ 540
Mexican Plaka Business [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Gain from sale of a business	$ 0		$ 0