Quarterly Financial Information - Quarterly Reportable Business Segment Information (As Restated) (Details) - USD ($) $ in Millions	3 Months Ended								6 Months Ended		9 Months Ended		12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Jun. 30, 2017	Jun. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Revenues		$ 3,776	$ 3,804	$ 3,486		$ 3,660	$ 3,782	$ 3,411	$ 7,290	$ 7,193	$ 11,066	$ 10,853
Segment income		589	673	557		617	720	544	1,230	1,264	1,819	1,881	$ 2,293	$ 2,356	$ 2,287
Corporate Expenditure		(45)	(32)	(56)		(43)	(60)	(63)	(88)	(123)	(133)	(166)	(181)	(220)	(225)
Interest expense, net of interest income		(22)	(22)	(21)		(28)	(24)	(24)	(43)	(48)	(65)	(76)	(85)	(99)	(86)
Segment Reporting Information Legacy Items		1	2	(8)		(4)	(10)	(11)	(6)	(21)	(5)	(25)	(2)	(114)	(51)
Asset write-down		0	0			0	(10)		0	(10)	0	(10)	(7)	(23)
Gain from the sale of an equity affiliate		0	0	0			20		25	20	25	20	25	39	0
Pension settlement charge	$ (38)	0	0	(22)	$ 0	(968)	0	0	(22)	0	(22)	(968)	(60)	(968)	0
Net gains on the divestitures of businesses		0	25			0	0		25	0	25	0	25	46	0
Income from a legal settlement		0	18			0	0		18	0	18	0	18	0	0
Transaction-related costs		0	(5)	(4)		0	(6)	(2)	(9)	(8)	(9)	(8)	(9)	(8)	(44)
Income before income taxes	$ 377	523	659	446	$ 131	(426)	630	444	1,105	1,074	1,628	648	2,005	779	1,745
Performance Coatings Segment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Revenues		2,290	2,299	2,017		2,223	2,338	2,039	4,316	4,377	6,606	6,600
Segment income		366	409	284		368	428	279	693	707	1,059	1,075	1,321	1,314	1,302
Industrial Coatings Segment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Revenues		1,486	1,505	1,469		1,437	1,444	1,372	2,974	2,816	4,460	4,253
Segment income		$ 223	$ 264	$ 273		$ 249	$ 292	$ 265	$ 537	$ 557	$ 760	$ 806	$ 972	$ 1,042	$ 985