Divestitures and Other Transactions - Performance Coatings (Summarized Financial Info) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013	Dec. 31, 2012
Income Statement Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income from discontinued operations after income taxes	$ 15		$ 1,999	$ 308
Performance Coatings [Member] | Discontinued Operations [Member]
Income Statement Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net sales	0		331	4,218
Income before income taxes	0		2,717	551
(Benefit from) provision for income taxes	(15)	[1]	718	243	[1]
Income from discontinued operations after income taxes	15		1,999	308
Tax expense on earnings of permanently invested foreign subsidiaries			$ 70

[1] The year ended December 31, 2014 includes a tax benefit of $(15) related to a change in estimate of income taxes resulting from the filing of various tax returns impacted by the sale of Performance Coatings. The year ended December 31, 2012 includes expense of $70 to accrue taxes associated with earnings of certain Performance Coatings subsidiaries that were previously considered permanently reinvested as these entities have been reclassified as held for sale.