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Revenue Disaggregation of Revenue (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2018 | Mar. 31, 2017
Disaggregation of Revenue [Line Items] |  |  |
Service revenue |  | $ 382 | $ 260
Service revenue - related parties |  | 471 | 255
Service revenue - product related |  | 44 | 0
Product sales | [1] | 206 |
Product sales - related parties |  | 4 | 2
Total revenues from contracts with customers |  | 1,107 |
Other income |  | 4 | 3
Total segment revenues and other income |  | 1,420 | 886
Income from equity method investments | [2] | (61) | (5)
Other income - related parties |  | (23) | (22)
L&S |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Service revenue |  | 28 |
Service revenue - related parties |  | 471 |
Service revenue - product related |  | 0 |
Product sales | [1] | 1 |
Product sales - related parties |  | 1 |
Total revenues from contracts with customers |  | 501 |
G&P |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Service revenue |  | 354 |
Service revenue - related parties |  | 0 |
Service revenue - product related |  | 44 |
Product sales | [1] | 205 |
Product sales - related parties |  | 3 |
Total revenues from contracts with customers |  | 606 |
Segment Reconciling Items |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue adjustment from unconsolidated affiliates |  | 137 | 92
Income from equity method investments |  | (61) | (5)
Other income - related parties |  | (13) | (11)
Unrealized derivative gains related to product sales | [3] | (1) | (7)
Operating Segments |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Service revenue |  | 1,215 | 746
Other income |  | 18 | 13
Total segment revenues and other income |  | 1,482 | 955
Operating Segments | L&S |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Service revenue |  | 646 | 345
Other income |  | 12 | 12
Total segment revenues and other income |  | 658 | 357
Operating Segments | G&P |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Service revenue |  | 569 | 401
Other income |  | 6 | 1
Total segment revenues and other income |  | 824 | 598
Product sales |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Unrealized gain (loss) |  | 1 | $ 7
Other Income [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Other income | [4] | $ 313 |
[1] | G&P “Product sales” exclude approximately $1 million of revenue related to derivative gains/losses and mark-to-market adjustments.
[2] | “Income (loss) from equity method investments” includes the impact of any basis differential amortization or accretion.
[3] | The Partnership makes a distinction between realized or unrealized gains and losses on derivatives. During the period when a derivative contract is outstanding, changes in the fair value of the derivative are recorded as an unrealized gain or loss. When a derivative contract matures or is settled, the previously recorded unrealized gain or loss is reversed and the realized gain or loss of the contract is recorded
[4] | Non-ASC 606 Revenue includes rental income, income from equity method investments, derivative gains/losses, mark-to-market adjustments, and other income.

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