|
Commitments and Contingencies - Environmental Matters (Details) (USD $)
In Millions, unless otherwise specified |
3 Months Ended |
|---|---|
|
Mar. 31, 2015
Method
|
|
| Environmental Matters | |
| Accrued environmental remediation costs | $ 1 |
| Maximum exposure | 1 |
| Number of estimation methodologies | 2 |
| Climate Change and Other Emissions | |
| Environmental Matters | |
| Number of major sources of other "criteria" pollutant | 6 |
| Maximum | Comprehensive Environmental Response, Compensation and Liability Act (CERCLA) Matters | |
| Environmental Matters | |
| Accrued environmental remediation costs | $ 1 |