Commitments and Contingent Liabilities (Accretion Of Future Funding Obligation) (Details) - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Mar. 31, 2016 |
Dec. 31, 2015 |
|
| Commitments and Contingencies Disclosure [Line Items] | ||
| Total obligation | $ 1,100 | |
| Asbestos litigation reserve current | 831 | $ 796 |
| Asbestos litigation reserve noncurrent | 255 | $ 252 |
| Total | 64 | |
| Asbestos Litigation Reserve Noncurrent [Member] | ||
| Commitments and Contingencies Disclosure [Line Items] | ||
| Future PPG cash payments to the Trust | 505 | |
| Estimated Litigation Liability | 325 | |
| Future Cash Payments to the Trust 2016-2023 | 320 | |
| Asbestos Issue [Member] | ||
| Commitments and Contingencies Disclosure [Line Items] | ||
| Remainder of 2016 | 11 | |
| 2015 | 13 | |
| 2016-2023 | 40 | |
| Total | $ 64 |