Reportable Business Segment Information (Segment Net Sales and Income) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	$ 4,575	$ 4,644	$ 13,680	$ 13,896
Segment income (loss)	712	698	2,192	2,120
Corporate	(72)	(88)	(224)	(240)
Interest expense, net of interest income	(19)	(25)	(49)	(94)
Business restructuring-related costs, net	0	(13)	(15)	(27)
Acquisition-related costs	(10)	(15)	(42)	(22)
Environmental remediation charges	0	0	(20)	0
Pension settlement charge	0	0	0	(190)
Insurance recovery of expenses incurred due to a natural disaster	0	0	0	9
Income before income taxes	611	557	1,842	1,556
Net loss attributable to noncontrolling interests	6	10	24	26	$ (2)
Performance Coatings
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	2,921	2,880	8,583	8,549
Segment income (loss)	513	452	1,485	1,384
Industrial Coatings
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	1,654	1,764	5,097	5,347
Segment income (loss)	$ 199	$ 246	$ 707	$ 736