Environmental Matters (Details) $ in Millions |
Mar. 31, 2016
USD ($)
Site
|
|---|---|
| Environmental Remediation Obligations [Abstract] | |
| Number of Sites Involved in Investigation | Site | 7 |
| Environmental Loss Contingency Number of Sites Where Reasonably Possible Future Costs is Insignificant | Site | 6 |
| Site contingency reasonably possible future costs | $ | $ 12 |
| Accrual for environmental loss contingencies | $ | $ 6 |