|
Other Income (Details) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | 6 Months Ended | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
|
Jun. 30, 2014
|
Jun. 30, 2013
|
Jun. 30, 2014
|
Jun. 30, 2013
|
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| Other Income Details [Abstract] | ||||||||||
| Rental income | $ 23 | $ 21 | $ 47 | $ 58 | [1] | |||||
| Net gain on non-operating asset dispositions | 7 | 0 | 11 | 4 | ||||||
| Interest Income | 1 | 1 | 2 | 2 | ||||||
| Non-operating environmental costs and other | (9) | 1 | 0 | [2] | (1) | |||||
| Total | 22 | 23 | 60 | 63 | ||||||
| Land lease contract settlement | 17 | |||||||||
| Permanent easement sale | $ 14 | |||||||||
|
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