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Reportable Segment Information (Segment Net Sales and Income) (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Mar. 31, 2014
Performance Coatings Segment [Member]
Mar. 31, 2013
Performance Coatings Segment [Member]
Mar. 31, 2014
Industrial Coatings Segment [Member]
Mar. 31, 2013
Industrial Coatings Segment [Member]
Mar. 31, 2013
Commodity Chemicals Segment [Member]
Mar. 31, 2014
Glass Segment [Member]
Mar. 31, 2013
Glass Segment [Member]
Mar. 31, 2013
Segment, Discontinued Operations [Member]
Sep. 30, 2013
Jersey City Manufacturing Plant [Member]
Sep. 30, 2006
Jersey City Manufacturing Plant [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]                        
Net sales $ 3,636 $ 3,108 $ 2,007 $ 1,578 $ 1,363 $ 1,274   $ 266 $ 256      
Segment income (loss) 483 395 248 192 231 198   4 5      
Legacy items (10) (46)                    
Business Combination, Acquisition Related Costs 3 6                    
Transaction expenses related to Separation and merger transaction             (14)          
Interest expense, net of interest income (35) (43)                    
Other unallocated corporate expense - net (63) (59)                    
Income before income taxes 372 241                    
PPG percent ownership interest                   40.00%    
Environmental remediation charge $ 0 $ 12                 $ 89 $ 165