|
Commitments And Contingencies Environmental Matters (Details) (USD $)
In Millions, unless otherwise specified |
Mar. 31, 2015
|
Dec. 31, 2014
|
|---|---|---|
| Environmental Exit Cost [Line Items] | ||
| Accrual for Environmental Loss Contingencies | $ 5 | $ 5 |
| Accrued Environmental Loss Contingencies, Noncurrent | 4 | 4 |
| Accrued Liabilities | ||
| Environmental Exit Cost [Line Items] | ||
| Accrued Environmental Loss Contingencies, Current | 1 | 1 |
| Other Long-Term Liabilities | ||
| Environmental Exit Cost [Line Items] | ||
| Accrued Environmental Loss Contingencies, Noncurrent | 4 | 4 |
| Discontinued Operations | Liabilities Held for Sale | ||
| Environmental Exit Cost [Line Items] | ||
| Accrual for Environmental Loss Contingencies | $ 16 | $ 16 |