Acquisitions (Additional Information) (Details) (USD $)	3 Months Ended	9 Months Ended			0 Months Ended	12 Months Ended		0 Months Ended	1 Months Ended
	Jun. 30, 2014	Sep. 30, 2014	Sep. 30, 2013	Jul. 31, 2014	Jun. 30, 2014 Comex [Member]	Dec. 31, 2013 Comex [Member]	Sep. 30, 2014 Comex [Member]	Apr. 02, 2013 AkzoNobel NA Architectural coatings acquisition [Member]	Sep. 30, 2014 Flat Glass Manufacturing Facility [Member]	Jul. 31, 2014 Pittsburgh Glass Works LLC [Member]	Sep. 30, 2014 Pittsburgh Glass Works LLC [Member]
Business Acquisition [Line Items]
Number of Stores							$ 0
Number of concessionaires							0
Number of employees							0
Manufacturing facilities							0
Number of distribution centers							0
Revenue reported for the last annual period of a business to be acquired.						1,000,000,000
Consideration transferred					2,300,000,000
Acquisition of noncontrolling interest	35,000,000	39,000,000	0
Business acquisitions, net of cash balances acquired		114,000,000	978,000,000					947,000,000
Acquired cash								14,000,000
Pre-tax gain on sale of substantially all of the assets of flat glass manufacturing facility									22,000,000
PPG percent ownership interest				40.00%							40.00%
Income from equity method investment										94,000,000
Cash distribution received from equity method investment										$ 38,000,000