Stock-Based Compensation (Stock Grants) (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted from the PPG Omnibus Plan	357,781	497,711,000,000
Stock options granted from the PPG Omnibus Plan, weighted average fair value per share	$ 43.05	$ 27,370,000.00
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSUs granted	116,989	152,875,000,000
RSUs granted, weighted average fair value	$ 179,210,000	$ 124,800,000
Contingently Issuable Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSUs granted	38,756,000,000	45,388,000,000
RSUs granted, weighted average fair value	$ 187,060,000	$ 131,510,000