Property, Plant and Equipment (Details) - USD ($) $ in Millions |
9 Months Ended | ||||||||
|---|---|---|---|---|---|---|---|---|---|
Sep. 30, 2016 |
Dec. 31, 2015 |
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| Property, Plant and Equipment | |||||||||
| Property, Plant and Equipment, Transfers and Changes | $ 363 | ||||||||
| Property, Plant and Equipment, at Cost | 3,642 | $ 3,894 | |||||||
| Accumulated depreciation (a) (b) | [1],[2] | (513) | (427) | ||||||
| Property, Plant and Equipment, Net | [3] | 3,129 | 3,467 | ||||||
| Gathering (a) | |||||||||
| Property, Plant and Equipment | |||||||||
| Property, Plant and Equipment, at Cost | [2] | 1,379 | 1,700 | ||||||
| Processing | |||||||||
| Property, Plant and Equipment | |||||||||
| Property, Plant and Equipment, at Cost | 573 | 565 | |||||||
| Terminalling and Transportation (b) | |||||||||
| Property, Plant and Equipment | |||||||||
| Property, Plant and Equipment, at Cost | [1] | 1,690 | 1,629 | ||||||
| Alaska Logistics Assets | |||||||||
| Property, Plant and Equipment | |||||||||
| Accumulated depreciation (a) (b) | (30) | (30) | |||||||
| Business combination, Property, Plant and Equipment recorded | $ 77 | $ 47 | |||||||
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