Reportable Segment Information (Segment Net Sales and Income) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	$ 4,024	$ 4,131	$ 7,648	$ 7,912
Segment income (loss)	660	651	1,175	1,170
Corporate	(45)	(23)	(90)	(66)
Interest expense, net of interest income	(28)	(24)	(53)	(45)
Legacy items	1	1	(1)	5
Business restructuring charge	(176)	(83)	(173)	(83)
Restructuring and related cost, accelerated depreciation	(6)	(5)	(12)	(5)
Costs associated with accounting investigations	(3)	(9)	(7)	(9)
Impairment of a non-manufacturing asset	0	9	0	9
Litigation Settlement, Expense	0	10	0	10
Costs related to customer assortment change	0	(10)	0	(14)
Environmental remediation charges	(30)	0	(40)	(34)
Transaction-related (costs) gain, net	(10)	0	(17)	0
Income before income taxes	363	479	782	900
Performance Coatings [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	2,430	2,498	4,538	4,658
Segment income (loss)	425	428	722	708
Industrial Coatings [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	1,594	1,633	3,110	3,254
Segment income (loss)	$ 235	$ 223	$ 453	$ 462