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Revenue ASC 606 Cumulative Effect Adjustments (Details) - USD ($) $ in Millions | Mar. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Inventories | $ 64 | $ 65 |
Property, plant and equipment, net | 13,291 | 12,187 |
Long-term deferred revenue | 49 | 42 |
Common unitholders - public | 6,832 | 9,827 |
Cumulative Adjusted 606 Balance |  |  |
Inventories |  | 66 |
Property, plant and equipment, net |  | 12,184 |
Long-term deferred revenue |  | 39 |
ASC 606 |  |  |
Long-term deferred revenue | 8 | 7 | [1]
ASC 606 | Inventories |  |  |
Cumulative effect of new accounting principle in period of adoption |  | 1 |
ASC 606 | Property, plant and equipment |  |  |
Cumulative effect of new accounting principle in period of adoption |  | (3) |
ASC 606 | Long-term deferred revenue |  |  |
Cumulative effect of new accounting principle in period of adoption |  | (3) |
Limited Partners Common Units | Public |  |  |
Common unitholders - public | $ 8,385 | 8,379 |
Limited Partners Common Units | Public | Cumulative Adjusted 606 Balance |  |  |
Common unitholders - public |  | 8,380 |
Limited Partners Common Units | Public | ASC 606 | Equity |  |  |
Cumulative effect of new accounting principle in period of adoption |  | $ 1 |
[1] | Balance represents ASC 606 portion of each respective line items.

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