Property, Plant and Equipment (Details) - USD ($) $ in Millions |
12 Months Ended | ||||||
|---|---|---|---|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
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| Property, Plant and Equipment | |||||||
| Property, Plant and Equipment, Net | $ 3,444 | $ 3,681 | |||||
| Property, Plant and Equipment, Transfers and Changes | 363 | ||||||
| Gathering | |||||||
| Property, Plant and Equipment | |||||||
| Property, Plant and Equipment, at Cost | [1] | 1,406 | 1,700 | ||||
| Processing | |||||||
| Property, Plant and Equipment | |||||||
| Property, Plant and Equipment, at Cost | 577 | 565 | |||||
| Terminalling and Transportation | |||||||
| Property, Plant and Equipment | |||||||
| Property, Plant and Equipment, at Cost | [2] | 2,076 | 1,897 | ||||
| Property Subject to or Available for Operating Lease, Gross | 385 | 252 | |||||
| Property Subject to or Available for Operating Lease, Accumulated Depreciation | [1],[2] | (111) | (41) | ||||
| Pipelines | |||||||
| Property, Plant and Equipment | |||||||
| Property, Plant and Equipment, at Cost | 4,059 | 4,162 | |||||
| Accumulated depreciation (a) (b) | [1],[2] | $ (615) | $ (481) | ||||
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