Borrowings (Details) € in Millions, $ in Millions |
3 Months Ended | |||
|---|---|---|---|---|
|
Mar. 31, 2016
USD ($)
|
Mar. 31, 2016
EUR (€)
|
Mar. 31, 2015
USD ($)
|
Mar. 31, 2015
EUR (€)
|
|
| Schedule of Held-to-maturity Securities [Line Items] | ||||
| Repayments of Debt | $ | $ 251 | $ 1 | ||
| Debt Instrument, Face Amount | 1,260 | € 1,200 | ||
| Proceeds from Notes Payable | $ | $ 1,240 | |||
| Notes 1.900 Percent Due 2016 [Member] | ||||
| Schedule of Held-to-maturity Securities [Line Items] | ||||
| Euro-denominated borrowings hedging a portion of PPG's net investment in European operations | € 250 | |||
| Stated interest rate | 1.90% | 1.90% | ||
| Seven-year Fixed Rate Euro Bank Loan Due 2022 [Member] | ||||
| Schedule of Held-to-maturity Securities [Line Items] | ||||
| Debt Instrument, Face Amount | € 600 | |||
| Stated interest rate | 0.875% | 0.875% | ||
| Twelve-year Fixed Rate Euro Bank Loan Due 2027 [Member] [Member] | ||||
| Schedule of Held-to-maturity Securities [Line Items] | ||||
| Debt Instrument, Face Amount | € 600 | |||
| Stated interest rate | 1.40% | 1.40% | ||