|
Pension Benefits Narrative (Details) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | |
|---|---|---|
|
Mar. 31, 2015
|
Dec. 31, 2014
|
|
| Compensation and Retirement Disclosure [Abstract] | ||
| Defined Benefit Pension Plan, Postemployment Benefit Period | 5 years | |
| Other Postretirement Benefits Payable | $ 3 | $ 3 |